Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Debt Securities Investment, Policy [Policy Text Block] First Company Statutory Trust 2003 First Company Statutory Trust 2003 [Member] First Company Statutory Trust 2003 Award Timing Predetermined Award Timing Predetermined [Flag] FHLB Advances Advance from Federal Home Loan Bank, Fiscal Year Maturity [Abstract] Amortization expense Investment Program, Proportional Amortization Method, Applied, Amortization Expense Entity File Number Entity File Number Paid-in Capital Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] Accounting Guidance Adopted in 2024 and Accounting Guidance Pending Adoption at December 31, 2024 New Accounting Pronouncements, Policy [Policy Text Block] Finance Lease, Liability [Abstract] Finance lease cost Finance Lease, Liability [Abstract] Carrying amounts and estimated fair values of financial instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Impairment losses Investment Program, Proportional Amortization Method, Elected, Impairment Loss Available-for-sale debt securities Debt Securities [Member] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Measurement Basis [Axis] Measurement Basis [Axis] Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year One Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year One 2027 Other Commitment, to be Paid, Year Two Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Reclassification adjustment for securities transferred from available-for-sale to held-to-maturity OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), before Tax Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Held-to-Maturity Debt Securities, Held-to-Maturity, Maturity [Abstract] Business Combination, Consideration Transferred [Abstract] Business Combination, Consideration Transferred [Abstract] Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Changes in fair value, gains Fair Value, Option, Changes in Fair Value, Gain (Loss) Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Stock issuances under stock incentive plans (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Derivative, average interest rate cap Derivative, Average Cap Interest Rate Interest rate cap agreements Interest rate caps Interest Rate Cap [Member] Total current income tax expense Current Income Tax Expense (Benefit) Adjustment to Compensation, Amount Adjustment to Compensation Amount Percentage of bonuses and directors fees for deferral of cash payments Percentage of Bonuses and Directors Fees for Deferral of Cash Payments Percentage of bonuses and directors fees for deferral of cash payments. Net decrease in short-term Federal Home Loan Bank advances Proceeds from (Repayments of) Short-Term Debt, Maturing in Three Months or Less Net (increase) decrease in other assets Increase (Decrease) in Other Operating Assets Principles of Consolidation Consolidation, Policy [Policy Text Block] Stock-based compensation, net of tax benefits Stock-based compensation, net of tax benefits Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Guaranty (TX) Capital Trust III Guaranty (TX) Capital Trust III [Member] Guaranty (TX) Capital Trust III Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Cash, Cash Equivalents and Interest Bearing Cash Deposits Cash and Cash Equivalents, Policy [Policy Text Block] Gain on sale of securities Debt and Equity Securities, Realized Gain (Loss) Cash paid during the period for income taxes Income Taxes Paid Effective income tax rate reconciliation Effective Income Tax Rate Reconciliation, Percent [Abstract] Cash dividends declared Dividends, Common Stock, Cash Total stockholders’ equity Balance Balance Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Total before mortgage-backed securities Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date Premises and equipment, net of accumulated depreciation Property, Plant and Equipment [Table Text Block] Common stock, authorized (in shares) Common Stock, Shares Authorized Financial assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Recurring measurements Fair Value, Recurring [Member] Fair value liability Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Amortized Cost Debt Securities, Amortized Cost Basis This item represents the cost of available-for-sale and held-to-maturity debt securities, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Derivatives Deferred Tax Liabilities, Derivatives Well capitalized requirement, Amount Banking Regulation, Tier 1 Leverage Capital, Well Capitalized, Minimum State and Local Jurisdiction State and Local Jurisdiction [Member] Well capitalized requirement, Amount Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Well Capitalized, Minimum Cash flow hedge designation Cash Flow Hedge Derivative Instrument Assets at Fair Value Cover [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Minimum age required to be considered eligible for plan Minimum Age Required to be Considered Eligible for Plan Minimum age required to be considered eligible for plan. Maximum Maximum [Member] Transfer of loans to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Mortgage-backed securities Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date Whole sale deposits Deposits, Wholesale DCB Financial Trust I DCB Financial Trust I [Member] DCB Financial Trust I Total, Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Intangibles, net Net carrying value Finite-Lived Intangible Assets, Net Restricted Stock Units Restricted Stock [Member] Well capitalized requirement, Amount Banking Regulation, Tier 1 Risk-Based Capital, Well Capitalized, Minimum Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Activity for restricted stock units Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Internal Investment Grade Internal Investment Grade [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] External Credit Rating, Standard & Poor's [Domain] External Credit Rating, Standard & Poor's [Domain] Number of credit rating categories, highest Number of credit rating categories, highest Number of credit rating categories, highest Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Weighted Average Term Extension Financing Receivable, Modified, Weighted Average Term Increase from Modification Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Wheatland Community Financial Group, Inc., Wheatland [Member] Community Financial Group, Inc., Wheatland Actual, Ratio Banking Regulation, Tier 1 Leverage Capital Ratio, Actual Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Proceeds from sale of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Mortgage-backed securities Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Schedule of Income Taxes Paid (Net of Refunds) Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Available-for-sale debt securities Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss Total interest expense Interest Expense, Operating Short-term Operating Lease, Liability, Current Bank Of Idaho Holding Co 2021 Bank Of Idaho Holding Co 2021 [Member] Bank Of Idaho Holding Co 2021 Interest on lease liabilities Finance Lease, Interest Expense Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Non-Accrual Financing Receivable, Excluding Accrued Interest, Nonaccrual Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Furniture, fixtures and equipment Furniture and Fixtures [Member] Award Type [Axis] Award Type [Axis] Parent Company Parent Company [Member] Unaudited pro forma summary of the acquisitions Business Combination, Pro Forma Information [Table Text Block] Other real estate owned and foreclosed assets Foreclosed Real Estate Expense Mortgage Banking [Abstract] Stock-based Compensation Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol Combined Approach Combined Approach Valuation Technique [Member] Combined Approach [Member] Aggregate intrinsic value of non-vested units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Business Combinations Business Combination [Policy Text Block] Reclassifications adjustments for amortization included in net income for transferred securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale, Amortization Included In Net Income, Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale, Amortization Included In Net Income, Parent Low-income tax credits (net) Effective Income Tax Rate Reconciliation, Tax Credit, Low-Income Tax Credits, Net, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Low-Income Tax Credits, Net, Percent Deferred Compensation Plan Deferred Compensation Plan [Member] deferred compensation plan. Entity Address, City or Town Entity Address, City or Town Utah UTAH Maturing four years through five years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Five Finance Leases, Weighted-average discount rate Finance Lease, Weighted Average Discount Rate, Percent Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Five Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Five Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Allowance for Credit Losses - Available-for-Sale Debt Securities, Held-to-Maturity Debt Securities and Loans Receivable Credit Loss, Financial Instrument [Policy Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Credit quality indictors for HTM debt securities Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block] Fair value of consideration transferred Total fair value of consideration transferred Business Combination, Consideration Transferred Interest receivable, held-to-maturity debt securities Interest Receivable, Held-To-Maturity Debt Securities Carrying amount as of the balance sheet date of interest earned but not received on held-to-maturity debt securities. Maturities of Time Deposits Maturities of Time Deposits [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Actual, Ratio Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual Finance Leases, Weighted-average remaining lease term Finance Lease, Weighted Average Remaining Lease Term Options outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Parent Holding Company Information (Condensed) Condensed Financial Information of Parent Company Only Disclosure [Text Block] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] 2028 Other Commitment, to be Paid, Year Three Deferred loan costs Deferred Tax Liabilities, Tax Deferred Income Total non-interest income Noninterest Income Difference between lease payments and present value of lease payments Finance Lease, Liability, Undiscounted Excess Amount Number of common stock shares outstanding (in shares) Balance (in shares) Balance (in shares) Common Stock, Shares, Outstanding Gain on sale of loans Gain on sale of loans Gain (Loss) on Sales of Loans, Net Amortized cost, gross unrealized gains and losses and the fair value of debt securities Marketable Securities [Table Text Block] Gross Unrealized Losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Equity investments obtained in exchange or delayed equity contributions Equity Investment Obtained In Exchange For Delayed Equity Contributions Equity Investment Obtained In Exchange For Delayed Equity Contributions Non-Interest Expense Noninterest Expense [Abstract] Guaranty Bancshares, Inc Guaranty Bancshares, Inc [Member] Guaranty Bancshares, Inc Cash on hand and in banks Cash and Due from Banks Legal fees Legal Fees Tax credits and other tax benefits recognized Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense Fair value measurement transfers from one level to another Fair Value Measurement Transfers From One Level To Another Fair Value Measurement Transfers From One Level To Another Federal Internal Revenue Service (IRS) [Member] Current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Total amount deferred Deferred Compensation Arrangement with Individual, Compensation Expense Tax benefit of units that vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Tax Benefit Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Tax Benefit Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Repurchase agreements Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] Operating lease liabilities Deferred Tax Assets Operating Lease Liabilities Amount of deferred tax asset attributable to deductible temporary differences from operating lease liabilities. Weighted Average Interest Rate Reduction Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Restricted Stock Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Rate Debt Instrument, Interest Rate, Effective Percentage Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Investment securities Interest and Dividend Income, Securities, Operating Pro Forma Information Business Combination, Pro Forma Information [Abstract] Federal and state income tax expense Total income tax expense Income tax benefit Income Tax Expense (Benefit) Rate Structure Debt Instrument, Basis Spread on Variable Rate FNB (UT) Statutory Trust II FNBUTStatutoryTrustII [Member] FNB (UT) Statutory Trust II Other assets Other Assets Credit Rating, Standard & Poor's [Axis] Credit Rating, Standard & Poor's [Axis] Thereafter Time Deposit Maturities, after Year Five Preferred shares, issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Period past due to consider loans as non accrual Period Past Due to Consider Loans as Non Accrual Period Past Due to Consider Loans as Non Accrual Right-of-use assets, net Finance Lease And Operating Lease, Right-Of-Use-Assets , Net Finance Lease And Operating Lease, Right-Of-Use-Assets , Net Premises and equipment, gross Property, Plant and Equipment, Gross Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Company's contribution to the plan Defined Contribution Plan, Employer Discretionary Contribution Amount Other Expenses Other Income and Expenses [Abstract] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Tier 1 capital (to risk-weighted assets) Banking Regulation, Tier 1 Risk-Based Capital [Abstract] Acquisitions and adjustments Goodwill, Acquired During Period Proceeds from stock option exercises Proceeds from Stock Options Exercised Net of tax amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent Time deposits that meet or exceed FDIC Insurance limit Time Deposits That Meet Or Exceed FDIC Insurance Limit The aggregate amount of domestic time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations that meet or exceed the FDIC Insurance limit. Federal Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Maturing two years through three years Finance Lease, Liability, to be Paid, Rolling Year Three Regulatory Capital Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Tax-exempt interest income Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Thereafter Other Commitment, to be Paid, after Year Five Deferred tax liabilities Deferred Tax Liabilities, Gross [Abstract] Other income Noninterest Income, Other Operating Income Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Unrecognized compensation costs Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Loan expenses Loan-Related Expenses Loan-related expenses. Repayments of short-term Federal Reserve Bank Term Funding Repayments of Short-Term Debt Acquisitions (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Acquisitions in Period, Weighted Average Exercise Price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Acquisitions in Period, Weighted Average Exercise Price Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Sales of debt securities, available-for-sale Proceeds from Sale of Debt Securities, Available-for-Sale Debt securities, available-for-sale Fair Value Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Leasehold improvements Building Improvements [Member] Useful life of premises and equipment Property, Plant and Equipment, Useful Life Preferred shares, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Net Interest Income Interest Income (Expense), Operating Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Actual, Amount Banking Regulation, Tier 1 Risk-Based Capital, Actual Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Maximum period of original maturity to be included in cash and cash equivalents Maximum Period Of Original Maturity To Be Included In Cash And Cash Equivalents Maximum Period Of Original Maturity To Be Included In Cash And Cash Equivalents Federal Home Loan Bank, Advance, Maturity, Year Four Federal Home Loan Bank, Advance, Maturity, Year Four Premises and Equipment, Net of Accumulated Depreciation Property, Plant and Equipment, Net, by Type [Abstract] Operating Leases Lessee, Operating Lease, Liability, to be Paid, Rolling Maturity [Abstract] Identifiable assets acquired Business Combination, Recognized Asset Acquired, Asset [Abstract] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Available-for-Sale, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Rolling Maturity [Abstract] Equity Components [Axis] Equity Components [Axis] Term loans originated fiscal year three before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Property, Plant and Equipment Property, Plant and Equipment [Line Items] Sublease income Sublease Income Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] 2026 Other Commitment, to be Paid, Year One Number of reportable segments Number of Reportable Segments Deferred tax assets Components of Deferred Tax Assets [Abstract] Glacier Capital Trust II Glacier Capital Trust II [Member] Glacier Capital Trust II Advertising and Promotion Advertising Cost [Policy Text Block] Proceeds from sale of other real estate owned Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Entity Address, State or Province Entity Address, State or Province Substandard Substandard [Member] Period past due to consider loan as purchased credit-deteriorated loan Period Past Due to Consider Loan As Purchased Credit-Deteriorated Loan Period Past Due to Consider Loan As Purchased Credit-Deteriorated Loan Principal payments on finance lease liabilities Finance Leases, Financing cash flows Finance Lease, Principal Payments Stock-based compensation and related taxes APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Total interest income Interest and Dividend Income, Operating Special Mention Special Mention [Member] Financing Receivables, Period Past Due [Domain] Financial Asset, Aging [Domain] Principal balances of loans serviced for others Servicing Asset Loans receivable, net of ACL Loans Receivable, Fair Value Disclosure Individual: Individual [Axis] Cost of plan Defined Contribution Plan, Cost Audit Information [Abstract] Audit Information [Abstract] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Cash dividends paid Payments of Ordinary Dividends, Common Stock Document Annual Report Document Annual Report Loan portfolio modified aging analysis Financing Receivable, Modified, Past Due [Table Text Block] Collateral-dependent impaired loans, net of ACL Collateral Dependent Impaired Loans Owned Fair Value Disclosure Collateral dependent impaired loans owned fair value disclosure. Carrying value at beginning of period Carrying value at end of period Servicing Asset at Amortized Cost Mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Principal Forgiveness Principal Forgiveness [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Minimum capital requirement, Amount Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum Entity Interactive Data Current Entity Interactive Data Current Restricted Stock Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Gross Charge-Offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] Condensed Income Statement [Table] Condensed Income Statement [Table] Financing Receivable, Modifications [Line Items] Financing Receivable, Modified [Line Items] Loss (gain) on sale and write-downs of other real estate owned, net Gains (Losses) on Sales of Other Real Estate Interest Income Interest and Dividend Income, Operating [Abstract] Loan Servicing Rights Transfers and Servicing of Financial Assets, Servicing of Financial Assets, Policy [Policy Text Block] Credit earning rate as a percentage of return on equity Credit Earning Rate as Percentage of Return on Equity Credit earning rate as a percentage of return on equity. Finance Leases Finance Lease, Liability, to be Paid, Rolling Maturity [Abstract] Total non-interest expense Noninterest Expense 2029 Other Commitment, to be Paid, Year Four Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Payment Deferral Payment Deferral [Member] Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) [Abstract] Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) [Abstract] Deposits Interest Expense, Deposits Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Unused lines of credit Commitment to Extend Credit [Member] Commitment to Extend Credit [Member] Non-Interest Income Noninterest Income [Abstract] Accumulated depreciation Finance Lease, Right-of-Use Asset, Accumulated Amortization Percentage of salary for deferral of cash payments Percentage of Salary for Deferral of Cash Payments Percentage of salary for deferral of cash payments. Entity Central Index Key Entity Central Index Key PEO Name PEO Name Total income Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Credit quality indicators for commercial loans Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Other Comprehensive Income, Net of Tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Minimum capital requirement, Amount Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum Total Investment Program, Proportional Amortization Method, Elected, Commitment Due after one year through five years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after One through Five Years Non-interest bearing deposits Noninterest-Bearing Deposit Liabilities Maximum period up to which purchase price of business is allocated to assets acquired and liabilities assumed Maximum Period up to Which Purchase Price of Business is Allocated to Assets Acquired and Liabilities Assumed Maximum Period up to Which Purchase Price of Business is Allocated to Assets Acquired and Liabilities Assumed. Schedule of other expenses Schedule of Other Operating Cost and Expense, by Component [Table Text Block] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Minimum capital requirement, Ratio Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum Sale and refinancing of other real estate owned Real Estate Owned, Transfer from Real Estate Owned Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Acquisition fair market value adjustments Deferred Tax Assets, Equity Method Investments Amortized Cost of Fair Value Hedging Included in the Carrying Amount of the Hedged Assets Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] (Losses) Gains on Derivatives Used for Fair Value Hedges Accumulated Gain (Loss), Net, Fair Value Hedge, Parent [Member] Accumulated Gain (Loss), Net, Fair Value Hedge, Parent 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three Reclassification adjustment for losses included in net income Other Comprehensive Income (Loss), Cash Flow Hedge, Reclassification for Discontinuance, before Tax Gross carrying value Finite-Lived Intangible Assets, Gross Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Additions Servicing Asset at Amortized Cost, Additions Size of company eligible for Tier 1 grandfather provision Size Of Company Eligible For Tier 1 Grandfather Provision Size of company eligible for Tier 1 grandfather provision. Entity Address, Address Line One Entity Address, Address Line One Accrued income and other assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Income And Other Assets Amount of other assets acquired at the acquisition date. Glacier Capital Trust III Glacier Capital Trust III [Member] Glacier Capital Trust III Loans Held for Sale Financing Receivable, Held-for-Sale [Policy Text Block] Accumulated Other Comp-rehensive (Loss) Income Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Number of branch locations acquired Business Combination, Number Of Branch Locations Acquired Business Combination, Number Of Branch Locations Acquired Federal Home Loan Bank, Advance, Maturity, Year Three Federal Home Loan Bank, Advance, Maturity, Year Three Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Fair value of common stock shares issued Stock Issued Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Summary of subordinated debentures Terms of Subordinated Debentures [Table Text Block] Terms of subordinated debentures. Checking and operating expenses Deposit-Related Expenses Deposit related expenses other than interest expense. Fair Value as of Grant Date Award Grant Date Fair Value Available-for-sale Debt Securities, Available-for-Sale, Realized Gain (Loss) [Abstract] Disposal Group, Held-for-Sale, Not Discontinued Operations Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] Due within one year Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling within One Year Operating loss carryforwards, amount Operating Loss Carryforwards Term loans originated fiscal year four years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Compensation and employee benefits Labor and Related Expense Add: dilutive restricted stock units and stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Minimum capital requirement, Ratio Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Miscellaneous loan fees and charges Miscellaneous Loan Fees And Charges Miscellaneous loan fees and charges on residential real estate, commercial, agriculture, and consumer loans. Fair value hedge designation Fair Value Hedge Assets Less than 12 Months, Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Actual, Ratio Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual Deposits Deposit Liabilities Disclosures [Text Block] Quantitative information about assets measured at fair value on a non-recurring basis for which Level 3 inputs were used Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] New market tax credits Effective Income Tax Rate Reconciliation, Tax Credit, New Market, Percenatge Effective Income Tax Rate Reconciliation, Tax Credit, New Market, Percenatge U.S. government sponsored enterprises U.S. government sponsored enterprises US Government-sponsored Enterprises Debt Securities [Member] Condensed Financial Information Disclosure [Abstract] Condensed Financial Information Disclosure [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock options outstanding, weighted average remaining contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Federal reserve balance or cash on hand required Federal Reserve Balance or Cash on Hand Required Federal Reserve balance or cash on hand required. Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent Lease liabilities location Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Summary of Loans Receivable Loan portfolio aging analysis Financing Receivable, after Allowance for Credit Loss [Abstract] Equity in undistributed (distributed) net income of subsidiaries Subsidiary income (in excess of) less than dividends distributed Subsidiary Income (in Excess of ) Less than Dividends Distributed Subsidiary Income (in Excess of ) Less than Dividends Distributed Income before equity in undistributed net income of subsidiaries Income Before Equity in Undistributed Earnings of subsidiaries Income before equity in undistributed earnings of subsidiaries. Age 50 and Over Employee Age 50 and Over [Member] Employee age of 50 and over for determination of maximum annual contributions per employee. Commercial loans Interest and Fee Income, Loans, Commercial Cash paid for acquisition Cash consideration or deposit premium paid Payments to Acquire Businesses, Gross Intercompany charges for services Intercompany Charges for Services Intercompany charges for services. Non-PEO NEO Non-PEO NEO [Member] Stock options outstanding, intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Federal Home Loan Bank advances Advances from Federal Home Loan Banks, Total Advance from Federal Home Loan Bank Maturing three years through four years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Four Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) [Line Items] Operating lease ROU assets Deferred Tax Liabilities Operating Lease ROU Assets Amount of deferred tax liability attributable to taxable temporary differences from operating lease ROU assets. Land Land [Member] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Equity Award [Domain] Award Type [Domain] Moody's: Aaa Rating Moody's, Aaa Rating [Member] Unrealized (losses) gains on derivatives used for cash flow hedges Amount of (loss) gain recognized in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Net change in loans Payments for (Proceeds from) Loans Receivable Operating Loss and Tax Credit Carryforwards [Table] Operating Loss and Tax Credit Carryforwards [Table] Operating Loss and Tax Credit Carryforwards [Table] Equity Awards Adjustments Equity Awards Adjustments [Member] Advertising and promotions Advertising Expense FHLB Scheduled Maturities Federal Home Loan Bank, Advance, Branch of FHLBank [Table Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Other income Other Income Compensation Amount Outstanding Recovery Compensation Amount Deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Well capitalized requirement, Amount Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Reclassification adjustments for losses and transfers included in net income AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale, Gains And Transfers Included In Net Income, Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale, Gains And Transfers Included In Net Income, Parent Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Estimated Fair Value Estimate of Fair Value Measurement [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Reclassification adjustment for (losses) gains included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Number of years for home equity loan origination term Number Of Years For Home Equity Loan Origination Term Number Of Years For Home Equity Loan Origination Term Income Revenues [Abstract] FHLB, FRB, securities sold under agreements to repurchase, and deposits Federal Home Loan Bank And Federal Reserve Bank Advances, Repurchase Agreements And Deposits [Member] Federal Home Loan Bank And Federal Reserve Bank Advances, Repurchase Agreements And Deposits 2029 Time Deposit Maturities, Year Four Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Summary of repayment through operation or sale of collateral Financing Receivable Repayment Through Operation Or Sale Of Collateral [Table Text Block] Tabular Disclosure of Financing Receivable Repayment Through Operation Or Sale Of Collateral. Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Glacier Bank Glacier Bank [Member] Glacier Bank Carrying value of equity investments in LIHTCs Investment, Proportional Amortization Method, Elected, Amount Accumulated other comprehensive loss Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Financial Instruments [Domain] Financial Instruments [Domain] CDE Certified Development Entities [Member] Certified development entities. Total gross deferred tax liabilities Deferred Tax Liabilities, Gross Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Tax credit compliance period Tax Credit Compliance Period The period in which a tax credit project must stay in compliance for the investor to keep the tax credits. Bank of Idaho And Guaranty Bancshares, Inc Bank of Idaho And Guaranty Bancshares, Inc [Member] Bank of Idaho And Guaranty Bancshares, Inc Other, net Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Pledging Purpose [Domain] Pledging Purpose [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Minimum Minimum [Member] Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Total financial assets Financial Assets Fair Value Disclosure Financial assets fair value disclosure. Period of employment required to be eligible for plan Period Of Employment Required To Be Eligible For Plan Period Of Employment Required To Be Eligible For Plan Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Net income Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Fair Value Measurement [Domain] Fair Value Measurement [Domain] Minimum capital requirement, Amount Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum Borrowings Debt Disclosure [Text Block] Gain on sale of securities Gain (Loss) on Sale of Investments Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Operating Leases, Operating cash flows Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Dividends declared during the period but not paid Dividends payable Dividends Payable FDIC Insurance limit Cash, FDIC Insured Amount Net income available to common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted 2030 Other Commitment, to be Paid, Year Five Collateral Held [Domain] Collateral Held [Domain] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Gains and Transfers Included in Net Income, and Accumulated Gain (Loss), Net, Cash Flow Hedge AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale, Gains And Transfers Included In Net Income, And Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale, Gains And Transfers Included In Net Income, And Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent Goodwill Roll Forward Goodwill [Roll Forward] Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] Due after five years through ten years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years Average outstanding shares - diluted (in shares) Average outstanding shares - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Deferred Compensation Plan Acquired Deferred Compensation Plan Acquired [Member] Deferred Compensation Plan Acquired [Member] Segment Reporting Segment Reporting, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Average remaining contractual term on non-vested units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Derivative [Table] Derivative [Table] Proceeds from bank-owned life insurance Proceeds from Life Insurance Policy Entity Small Business Entity Small Business Percentage of outstanding common stock acquired Business Combination, Voting Equity Interest Acquired, Percentage Minimum number of quarters required to be eligible for employer discretionary contribution Minimum number of quarters required to be eligible for employer discretionary contribution Minimum number of quarters required to be eligible for employer discretionary contribution of the profit sharing plan. Due within one year Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Other Other Cost and Expense, Operating Held-to-Maturity, Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Average Maturity Derivative, Average Remaining Maturity Preferred shares, outstanding (in shares) Preferred Stock, Shares Outstanding State Current State and Local Tax Expense (Benefit) Document Transition Report Document Transition Report Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Outstanding commitments Other Commitments [Abstract] Total lease payments Finance Lease, Liability, to be Paid Underlying Securities Award Underlying Securities Amount Gross realized gains Debt Securities, Available-for-Sale, Realized Gain Equity Component [Domain] Equity Component [Domain] Maturing one year through two years Finance Lease, Liability, to be Paid, Rolling Year Two Document Period End Date Document Period End Date Gross Unrealized Losses Securities, Gross Unrealized Loss Accumulated In Investments Amount of accumulated unrealized loss before deducting unrealized gain on investments in available-for-sale and held-to-maturity securities impacting investments. Federal and State Income Taxes Income Tax Disclosure [Text Block] Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Short-term lease cost Short-Term Lease, Cost Total debt securities Debt Securities, Available-for-Sale and Held-to-Maturity, after Allowance for Credit Loss [Abstract] Net decrease in operating lease liabilities Increase (Decrease) in Operating Lease Liability Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Revolving loans Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Variable lease cost Variable Lease, Cost Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Federal Home Loan Bank, Advance, Maturity, after Year Five Federal Home Loan Bank, Advance, Maturity, after Year Five Assets and Liabilities Assets and Liabilities, Lessee [Abstract] Range [Axis] Statistical Measurement [Axis] Gross Charge-Offs, originated fiscal year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate The weighted average interest rate applicable to the Federal Home Loan Bank advances. Quantitative Information About Level 3 Fair Value Measurements Fair Value Measurement Inputs and Valuation Techniques [Line Items] Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Options, exercised in period, intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Tax withholding payments for stock-based compensation Tax withholding payments for stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Proceeds from long-term Federal Home Loan Bank advances Proceeds from FHLBank Borrowings, Financing Activities Net income available to common stockholders, basic Net Income (Loss) Available to Common Stockholders, Basic PCD loans acquired Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value Other comprehensive income (loss) Net current period other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Options [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Other Expenses [Abstract] Other Expenses [Abstract] Combination - Term Extension and Interest Rate Reduction Extended Maturity and Interest Rate Reduction [Member] Net amortization of purchase accounting adjustments and deferred loan fees and costs Accretion (Amortization) Of Discounts And Premiums, Business Combinations The sum of the periodic adjustments of the differences between business combination asset and liability fair values and carrying values that are charged against earnings. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method. Effect of Fair Value Hedge on OCI Derivative Instruments, Gain (Loss) [Table Text Block] Total Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Level 1 Fair Value, Inputs, Level 1 [Member] Loss (gain) on dispositions of premises and equipment Loss (gain) on dispositions of premises and equipment Gain (Loss) on Disposition of Assets S&P: AAA Rating Standard & Poor's, AAA Rating [Member] Repayments of long-term Federal Home Loan Bank advances Payments of FHLBank Borrowings, Financing Activities Repayment of notes receivable from related parties Repayment of Notes Receivable from Related Parties Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Other tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount Deposits with related parties Related Party Deposit Liabilities AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Amortized Cost Basis Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Overnight and Continuous Maturity Overnight and on Demand [Member] State and local Income Tax Paid, State and Local, after Refund Received Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Auditor Location Auditor Location Core Deposits Intangibles Core Deposits [Member] LIHTC Variable Interest Entity, Not Primary Beneficiary [Member] Transferred debt securities Deferred Tax Liabilities, Transfers From Available-For-Sale To Held-To-Maturity Debt Securities Deferred Tax Liabilities, Transfers From Available-For-Sale To Held-To-Maturity Debt Securities Accrued expenses and other liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Expenses And Other Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Expenses And Other Liabilities Extended Maturity Extended Maturity [Member] FHLB advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Comprehensive Income Comprehensive Income, Policy [Policy Text Block] 30-89 Days Past Due Financial Asset, 30 To 89 Days Past Due [Member] Financial Asset, 30 To 89 Days Past Due Summary of debt securities Gain (Loss) on Securities [Line Items] Difference between lease payments and present value of lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total taxes paid Total taxes paid Income Taxes Paid, Net Other, net Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent 2026 Time Deposit Maturities, Year One Corporate bonds Corporate Bond Securities [Member] Number of stock-based compensation plans Number of Share-Based Compensation Plans Number of Share-Based Compensation Plans 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Premises and Equipment Property, Plant and Equipment Disclosure [Text Block] Total lease payments Lessee, Operating Lease, Liability, to be Paid Securities Sold Under Agreements to Repurchase Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Capital adequacy guidelines and compliance Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Loans receivable Loans receivable Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Percentage of likelihood for term more likely than not as it relates to income taxes Percentage of Likelihood for Term More Likely Than Not Percentage of likelihood for term more likely than not. Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase Summary of debt securities with an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Other Commitments [Domain] Other Commitments [Domain] Net increase (decrease) in other liabilities Increase (Decrease) in Other Operating Liabilities 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Five Net (decrease) increase in other borrowed funds Proceeds from (Repayments of) Other Debt Debit card expenses Debit Card Expense Debit card expense. Net premises and equipment Property, Plant and Equipment, Net Amortization expense and tax credits and other tax benefits recognized for qualified affordable housing project investments Equity Method Investments [Table Text Block] Net of tax amount Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Receivables [Abstract] Net additions of premises and equipment Payments for (Proceeds from) Productive Assets Interest rate swap derivative financial instruments Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Financing Receivable, before Allowance for Credit Loss, by Origination Year Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] Collateral Held [Axis] Collateral Held [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Gross realized losses Held-To-Maturity Securities, Sold Security, Realized Loss This item represents the loss realized on the sale of held-to-maturity securities disposed of during the period. Additionally, this item may include, if not separately presented, any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt securities which are being or have been recognized in earnings during the period. Financing receivable, allowance for credit losses, number of components Financing Receivable, Allowance for Credit Losses, Number of Components Financing Receivable, Allowance for Credit Losses, Number of Components Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Condensed Statements of Financial Condition Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] 12 Months or More, Unrealized Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Loans Receivable and Allowance for Credit Losses Financing Receivable [Policy Text Block] State taxes, net of federal income tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Short-term Finance Lease, Liability, Current Sales Comparison Approach Valuation, Market Approach [Member] Current Fiscal Year End Date Current Fiscal Year End Date Deposits Deposits (Textual) [Abstract] Deposits textual. Less than 12 Months, Unrealized Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Summary of loans receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Equity Securities Equity Securities without Readily Determinable Fair Value [Policy Text Block] Weighted- Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Shares available to grant to employees and directors (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Federal Home Loan Bank stock, at cost Federal Home Loan Bank Stock Fair value asset Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Gain (Loss) on Sale of Loans Gain (Loss) on Sale of Loans [Member] Primary financial statement caption encompassing gain (loss) on sale of loans. Other expenses Total other expenses Other operating expenses Other Noninterest Expense Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Maturing four years through five years Finance Lease, Liability, to be Paid, Rolling Year Five Pass Pass [Member] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Principal Forgiveness Financing Receivable, Excluding Accrued Interest, Modified, Increase (Decrease) from Modification Total, Unrealized Loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Fair value measurement of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Stock issued in connection with acquisitions Stock Issued During Period, Value, Acquisitions Financing receivable, allowance for credit losses, forecasting period Financing Receivable, Allowance for Credit Losses, Forecasting Period Financing Receivable, Allowance for Credit Losses, Forecasting Period Total identifiable net assets (liabilities) Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Unrecognized tax benefits Unrecognized Tax Benefits Restricted stock units and stock options excluded from the diluted average outstanding share calculation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Termination of interest rate swaps Termination of interest rate swaps Payments for Derivative Instrument, Investing Activities Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Liability related to obligations of deferred compensation plans Deferred Compensation Arrangement with Individual, Recorded Liability Liabilities assumed Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Federal Home Loan Bank, Advance, Maturity, Year One Federal Home Loan Bank, Advance, Maturity, Year One Collateral Pledged Collateral Pledged [Member] Loan portfolio aging analysis Financing Receivable, Past Due [Table Text Block] Number of bank divisions Number of Bank Divisions Number of Bank Divisions Interest bearing deposits Interest-Bearing Deposit Liabilities Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Four Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Four Other Commitments [Table] Other Commitments [Table] Leases Lessee, Operating Leases [Text Block] Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Credit Rating, Moody's [Axis] Credit Rating, Moody's [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Due after five years through ten years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Tier 1 capital (to average assets) Banking Regulation, Tier 1 Leverage Capital [Abstract] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Stock issuances under stock incentive plans Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Borrowings Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Borrowings Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Borrowings. Disposal Group Classification [Domain] Disposal Group Classification [Domain] Held-to-maturity Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Other Consumer Consumer Portfolio Segment [Member] Origination of notes receivable from related parties Origination of Notes Receivable from Related Parties Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Total capital (to risk-weighted assets) Banking Regulation, Total Capital [Abstract] Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Supplemental Disclosure of Non-Cash Investing Activities Other Noncash Investing and Financing Items [Abstract] Entity Tax Identification Number Entity Tax Identification Number Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Gross Charge-Offs, originated three years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Carrying amounts of consolidated VIEs' assets and liabilities Schedule of Variable Interest Entities [Table Text Block] Wheatland and RMB Wheatland and RMB [Member] Wheatland and RMB Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Loans Receivable Loans and Leases Receivable Disclosure [Abstract] Number of common stock shares issued (in shares) Common Stock, Shares, Issued Debt securities, period increase (decrease) Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) Operating Leases, Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Commercial mortgage-backed securities Commercial Mortgage-Backed Securities [Member] Other Intangible Assets and Goodwill Goodwill and Intangible Assets Disclosure [Text Block] Consumer and other loans Interest and Fee Income, Loans, Other Consumer Impaired loans, measurement input Impaired Loans, Measurement Input Value of input used to measure impaired loans. Entity Public Float Entity Public Float Schedule of changes in goodwill Schedule of Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Security Exchange Name Security Exchange Name Loans Receivable, Net Financing Receivables [Text Block] Lines of credit Line of Credit Facility, Maximum Borrowing Capacity Pledging Purpose [Axis] Pledging Purpose [Axis] Interest earned on interest bearing cash deposits Interest and Dividend Income, Securities, Operating, Other Statement [Line Items] Statement [Line Items] Age Under 50 Employee Age Under 50 [Member] Employee age of under 50 for determination of maximum annual contributions per employee. Amortized cost of the Hedged Assets Hedged Asset, Fair Value Hedge Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Transferred debt securities Deferred Tax Asset, Debt Securities, Available For Sale, Transferred Deferred Tax Asset, Debt Securities, Available For Sale, Transferred Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Present value of lease payments Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Rocky Mountain Bank Rocky Mountain Bank Division Of HTLF Bank [Member] Rocky Mountain Bank Division Of HTLF Bank Consulting and outside services Consulting Fees Consulting fees other than legal and accounting fees. Loans Held For Sale Loans Held For Sale [Member] This item represents loans held-for-sale including, but not limited to, mortgage loans and finance receivables. Retirement Plan Employee Age [Axis] Retirement Plan Employee Age [Axis] Information about age of employee for determination of maximum annual contributions per employee. Range [Domain] Statistical Measurement [Domain] Business Combination [Abstract] Condensed statements of financial condition Condensed Balance Sheet [Table Text Block] Scheduled maturities of time deposits Scheduled Maturities of Certificates of Deposit [Table Text Block] Scheduled maturities of certificates of deposit. Minimum period past due to consider loans as non accrual Minimum Period Past Due To Consider Loans As Non Accrual Minimum Period Past Due To Consider Loans As Non Accrual FRB Bank Term Funding Interest Expense, Federal Reserve Bank Funding, Short-Term Interest Expense, Federal Reserve Bank Funding, Short-Term Property, plant and equipment held for sale Disposal Group, Including Discontinued Operation, Property, Plant and Equipment Unrealized losses on derivatives used for fair value hedges Other Comprehensive Income (Loss), Derivative Fair Value Hedge Component, Gain (Loss), before Reclassification and Tax Other Comprehensive Income (Loss), Derivative Fair Value Hedge Component, Gain (Loss), before Reclassification and Tax Goodwill, expected tax deductible amount Business Combination, Goodwill, Expected Tax Deductible, Amount Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Interest rate swap agreements Interest rate Swap Interest Rate Swap [Member] Long-lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Bank-owned life insurance Bank Owned Life Insurance Leases [Abstract] Number of shares issued for acquisition (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Maximum term leases will be considered short-term Maximum Term Leases Will Be Considered Short-term Maximum Term Leases Will Be Considered Short-term Pledged Status [Axis] Pledged Status [Axis] Retirement Plan Name [Axis] Retirement Plan Name [Axis] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic earnings per share (in dollars per share) Earnings Per Share, Basic Employee expenses Miscellaneous Employee Expenses Miscellaneous employee expenses other than compensation and benefits. Printing and supplies Supplies Expense Total gross deferred tax assets Deferred Tax Assets, Gross S&P: A+, A or A- Ratings Standard & Poor's, A+, A or A- Ratings [Member] A+, A or A- credit ratings as defined by the external credit rating agency, Standard & Poor's. Gain or loss on sale of investments Gain (Loss) on Investments [Abstract] Minimum number of days delinquent to charge off loans Financing Receivable, Threshold Period Past Due, Writeoff Exercise of option, tax benefit Share-Based Payment Arrangement, Exercise of Option, Tax Benefit 2030 Time Deposit Maturities, Year Five Net (increase) decrease in accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Term deposits Deposits, Fair Value Disclosure Gross Unrealized Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Measurement Input Type [Domain] Measurement Input Type [Domain] Accounting and audit fees Accounting Fees Accounting Fees Fair value measurement of assets measured at fair value on a non-recurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Glacier Capital Trust IV Glacier Capital Trust IV [Member] Glacier Capital Trust IV Other Other [Member] Other Charge-offs Gross Charge-Offs Total Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Amortization of investments in variable interest entities Variable Interest Entities Investment Amortization Amount of amortization expense of investment in variable interest entities. Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Consolidated VIEs Variable Interest Entity, Primary Beneficiary [Member] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Schedule of Marketable Securities [Table] Schedule of Marketable Securities [Table] Schedule of Marketable Securities [Table] Investment, Proportional Amortization Method, Elected, Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Investment, Proportional Amortization Method, Elected, Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Investment, Proportional Amortization Method, Elected, Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Other comprehensive (loss) income before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Pre-Tax Gains or Losses Derivative Instruments, Gain (Loss) [Line Items] Compensation expense related to stock-based compensation plans Share-Based Payment Arrangement, Expense Hedging Designation [Domain] Hedging Designation [Domain] Accrued interest receivable on loans Financing Receivable, Accrued Interest, after Allowance for Credit Loss Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Loans held for sale, at fair value Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance Telephone Telephone Expenses Telephone expenses Total liabilities and stockholders’ equity Liabilities and Equity Stock issued in connection with acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Servicing asset at amortized cost Servicing Asset at Amortized Cost [Table Text Block] Reclassification adjustments Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Other Deferred Tax Assets, Other Debt Securities, Held-to-maturity, Credit Quality Indicator [Table] Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table] Accounting Policies [Abstract] Operating lease liability maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Investments in variable interest entities Payments to Acquire Other Investments Proceeds from sales and calls of debt securities Proceeds From Sales And Calls Of Debt Securities, Available-For-sale Proceeds From Sales And Calls Of Debt Securities, Available-For-sale Fair value of units that vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Term loans originated fiscal year current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Pay vs Performance Disclosure [Line Items] Well capitalized requirement, Ratio Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum U.S. government and federal agency US Government Agencies Debt Securities [Member] Operating lease liabilities Total present value of lease payments Operating Lease, Liability Accruing loans 90 days or more past due 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Liabilities Liabilities Liabilities [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Rolling Year Five Mergers & Acquisitions Business Combination [Text Block] Total financial liabilities Financial Liabilities Fair Value Disclosure Amortization of ROU assets Finance Lease, Right-of-Use Asset, Amortization Well capitalized requirement, Ratio Tier One Common Capital Required To Be Well Capitalized To Risk Weighted Assets The Tier 1 common capital ratio (Tier 1 common capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. Period past due to consider loans as delinquent Financing Receivable, Threshold Period Past Due Regulatory Capital Regulatory Capital Requirements under Banking Regulations [Text Block] Percentage of employee's contribution required to determine the matched amount under the plan Percentage of Employees Contribution Required to Determine Matched Amount Under Plan Percentage of employee's contribution required to determine matched amount under plan. Variable Interest Entity [Table] Variable Interest Entity [Table] Term loans originated fiscal year two years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Condensed Statements of Cash Flows Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Cash Flow Hedge: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Well capitalized requirement, Ratio Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Total Comprehensive Income Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Minimum period past due to consider loans as delinquent Minimum Period Past Due To Consider Loans As Delinquent Minimum Period Past Due To Consider Loans As Delinquent Net increase (decrease) in deposits Increase (Decrease) in Deposits Maturities, prepayments and calls of available-for-sale debt securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Cumulative basis adjustments for fair value hedges Summary of Derivative Instruments by Hedge Designation [Abstract] Maturing one year through two years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Two Summary of leases Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Available-for-Sale Available-for-Sale Securities, Debt Maturities [Abstract] Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Condensed statements of cash flows Condensed Cash Flow Statement [Table Text Block] Allowance for credit losses Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Financing Receivable, Allowance for Credit Loss 2026 Finite-Lived Intangible Asset, Expected Amortization, Year One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Cash, Cash Equivalents and Interest Bearing Cash Deposits Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Amount of (loss) gain recognized in OCI Other Comprehensive Income (Loss), Fair Value Hedge Component , Gain (Loss), before Reclassification and Tax Other Comprehensive Income (Loss), Fair Value Hedge Component , Gain (Loss), before Reclassification and Tax Income Taxes Income Tax, Policy [Policy Text Block] Tax benefit of operating loss carryforwards Other Tax Expense (Benefit) Allowance for loan and lease losses Financing Receivable, Allowance for Credit Loss [Roll Forward] Summary of net deferred tax asset Components of Deferred Tax Assets and Liabilities [Abstract] Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Nature of Operations and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Core deposit intangible, weighted average useful life (in years) Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Overdraft demand deposits reclassified as loans Overdraft Demand Deposits Reclassified as Loans Overdraft demand deposits reclassified as loans. Financial Assets Assets, Fair Value Disclosure [Abstract] Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost 2027 Time Deposit Maturities, Year Two Variable Interest Entities Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four Minimum capital requirement, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum Fair Value Fair Value Debt securities, held-to-maturity Debt Securities, Held-to-Maturity, Fair Value Other Borrowings Consolidation, Variable Interest Entity, Policy [Policy Text Block] Dividends declared per share (in dollars per share) Cash dividends declared per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Right-of-use assets obtained in exchange for new lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Lease Expense Lease, Cost [Abstract] Total identifiable assets acquired Business Combination, Recognized Asset Acquired, Asset Proceeds from calls of debt securities Held-To-Maturity Securities, Gross Realized Gains (Losses), Sale Proceeds The total amount of proceeds received for the sale of securities categorized as held-to-maturity during the reporting period. The sale of held-to-maturity securities includes proceeds from maturities, prepayments and calls. Level 2 Fair Value, Inputs, Level 2 [Member] Document Financial Statement Error Correction Document Financial Statement Error Correction [Flag] State taxes, net of federal income tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Present value of lease payments Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Related Party Related Party [Member] Asset Pledged as Collateral Asset Pledged as Collateral [Member] Summary of consolidated income tax expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Premises and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Fair value of assets acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired PEO PEO [Member] Actual, Amount Banking Regulation, Tier 1 Leverage Capital, Actual Amortized cost and fair value of debt securities by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Postage Postage Expense Intangibles Deferred Tax Liabilities, Intangible Assets Operating Loss and Tax Credit Carryforwards Operating Loss and Tax Credit Carryforwards [Line Items] [Line Items] for Operating Loss and Tax Credit Carryforwards [Table] Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Paid, by Individual Jurisdiction [Line Items] Due within one year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Other Real Estate Owned Financing Receivable, Held-for-Investment, Foreclosed Asset [Policy Text Block] Actual, Amount Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual Common Equity Tier 1 (to risk-weighted assets) Banking Regulation, Common Equity Tier 1 Risk-Based Capital [Abstract] Depreciation of premises and equipment Deferred Tax Liabilities, Property, Plant and Equipment Total Time Deposits Retained Earnings- Substantially Restricted Retained Earnings [Member] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Gross realized gains Held-To-Maturity Securities, Sold Security, Realized Gain This item represents the gain realized on the sale of held-to-maturity securities disposed of during the period. Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Payment Arrangement [Abstract] Cash, cash equivalents at beginning of period Cash, cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Derivative asset Derivative Asset 12 Months or More, Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Nonrecurring Measurements Fair Value, Nonrecurring [Member] Net (decrease) increase in accrued interest payable Increase (Decrease) in Interest Payable, Net Minimum capital requirement, Amount Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum Financing Receivable, Modified [Table] Financing Receivable, Modified [Table] Non-Accrual and 90 Days or More Past Due Financial Asset, Equal To Or Greater Than 90 Days Past Due And Nonaccruals [Member] Financial Asset, Equal To Or Greater Than 90 Days Past Due And Nonaccruals Provision for credit loss unfunded Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Retirement Plan Employee Age [Domain] Retirement Plan Employee Age [Domain] [Domain] for Information about age of employee for determination of maximum annual contributions per employee. Available-for-sale Debt Securities, Available-for-Sale [Abstract] Purchases of equity securities Payments to Acquire Federal Home Loan Bank Stock Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] 2019 Heritage Bank 2019 Heritage Bank [Member] 2019 Heritage Bank Notional Amount Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Loans acquired Loans receivable, net of ACL Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Gross Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Gross Income before income tax benefit and equity in undistributed net income of subsidiaries Earnings Before Income Tax Benefit and Equity in Undistributed Earnings of Subsidiaries Earnings before income tax benefit and equity in undistributed earnings of subsidiaries. Tax-exempt interest income Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Income Tax Paid, by Individual Jurisdiction [Table] Income Tax Paid, by Individual Jurisdiction [Table] Revolving loans Financing Receivable, Excluding Accrued Interest, Revolving Consideration transferred, identifiable net assets acquired and resulting goodwill Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] OREO secured by residential real estate Other Real Estate Subordinated debentures Interest Expense, Junior Subordinated Debentures City Area Code City Area Code Financing receivable, allowance for credit loss Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Interest costs capitalized Interest Costs Capitalized Moody's: Not Rated Moody's, Not Rated [Member] Not rated by the external credit rating agency, Moody's. Minimum capital requirement, Ratio Tier One Common Capital Required For Capital Adequacy To Risk Weighted Assets The minimum Tier One Common Capital Ratio (Tier one common capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Lease liabilities location Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Accrued interest receivable Interest Receivable Percentage of amount out of first specific percent of employee's contribution matched under plan Defined Contribution Plan, Employer Matching Contribution, Percent of Match Changes in shares granted for stock options Schedule of Stock Options Roll Forward [Table Text Block] Investment Program Proportional Amortization Method Applied Income Tax Credit And Other Tax Benefit Amortization State Of Cash Flows Extensible Enumeration Not Disclosed Flag Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration] Total lease expense Lease, Cost Other liabilities Other Liabilities Goodwill Net carrying value at beginning of period Net carrying value at end of period Goodwill recognized Goodwill Components of lease expense and supplemental cash flow information Lease, Cost [Table Text Block] Loans modified in period Financing Receivable, Modified in Period, Amount Federal Deferred Federal Income Tax Expense (Benefit) Premises and equipment, net Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization Auditor Name Auditor Name Investment in subsidiaries Investments In Subsidiaries Investments In Subsidiaries Total before mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Loan Servicing Transfers and Servicing of Financial Assets [Text Block] Supplemental Disclosure of Cash Flow Information Supplemental Cash Flow Information [Abstract] Accumulated impairment charge Goodwill, Impaired, Accumulated Impairment Loss Other Performance Measure, Amount Other Performance Measure, Amount Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Bank of the San Juans Bancorporation Trust I Bank of the San Juans Bancorporation Trust I [Member] Bank of the San Juans Bancorporation Trust I U.S. government and federal agency US Treasury and Government [Member] Marketable Securities Marketable Securities, Policy [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Other real estate Real Estate [Member] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Equity contributed to subsidiaries Proceeds From Subsidiaries (Payments To Acquire Additional Interest In Subsidiaries) Proceeds From Subsidiaries (Payments To Acquire Additional Interest In Subsidiaries) Derivative Instrument [Axis] Derivative Instrument [Axis] Restricted cash Restricted Cash Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Financial liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Basic and Diluted Earnings Per Share Earnings Per Share Reconciliation [Abstract] Commercial Real Estate Commercial Real Estate Portfolio Segment [Member] Leases Lessee, Finance Leases [Text Block] S&P: Not Rated Standard & Poor's, Not Rated [Member] Not rated by the external credit rating agency, Standard & Poor's. Paid-in capital Additional Paid in Capital, Common Stock Entity [Domain] Entity [Domain] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Low-income tax credits (net) Effective Income Tax Rate Reconciliation, Tax Credit, Low-Income Tax Credits, Net, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Low-Income Tax Credits, Net, Amount Cash paid during the period for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Bank-Owned Life Insurance Bank-Owned Life Insurance Policy [Policy Text Block] Bank-Owned Life Insurance Policy TBA commitments TBA Commitments [Member] TBA Commitments Right-of-use assets, net Operating Lease, Right-of-Use Asset Net purchase accounting (discounts) premiums included in loans receivable Financing Receivable, Unamortized Purchase Premium (Discount) Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Effective income tax Effective Income Tax Rate Reconciliation, Percent Selling costs Measurement Input, Cost to Sell [Member] Operating lease cost Operating Lease, Cost Carrying Amount Reported Value Measurement [Member] Plan Name [Domain] Plan Name [Domain] Acquisition related costs Business Combination, Acquisition-Related Cost, Expense Tax effect Other Comprehensive Income (Loss), Derivative Fair Value Hedge Component, Gain (Loss), After Reclassification,Tax Other Comprehensive Income (Loss), Derivative Fair Value Hedge Component, Gain (Loss), After Reclassification,Tax Unrecognized compensation expense, recognized over weighted-average period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Deferred tax assets, valuation allowance Deferred Tax Assets, Valuation Allowance Equity [Abstract] Equity [Abstract] Acquisitions Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Office Buildings Buildings and construction in progress Building [Member] Qualified Affordable Housing Project Investments Qualified Affordable Housing Project Investments [Member] Qualified Affordable Housing Project Investments [Member] Derivatives and Hedging Activities Derivatives, Policy [Policy Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Bank of Idaho Bank of Idaho [Member] Bank of Idaho Federal Current Federal Tax Expense (Benefit) Net of tax amount Other Comprehensive Income (Loss), Derivative Fair Value Hedge Component, Gain (Loss), After Reclassification And Tax Other Comprehensive Income (Loss), Derivative Fair Value Hedge Component, Gain (Loss), After Reclassification And Tax Outstanding Commitments Other Commitments [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Data processing Information Technology and Data Processing Finite-Lived Intangible Assets Finite-Lived Intangible Assets [Line Items] Doubtful/ Loss Doubtful [Member] Future unfunded contingent commitments Outstanding commitments Other Commitments [Table Text Block] Tax effect Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Held-to-Maturity, Fair Value Debt Securities, Held-to-Maturity, Fair Value, Rolling Maturity [Abstract] Accumulated Other Comprehensive (Loss) Income Comprehensive Income (Loss) Note [Text Block] Weighted Average Range Weighted Average [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Net deferred origination (fees) costs included in loans receivable Financing Receivable, Unamortized Loan Cost (Fee) Lessee Leases Lessee, Leases [Policy Text Block] Amortization of core deposit and other intangibles Aggregate amortization expense Amortization of Intangible Assets Carrying value of repurchase agreements by maturity and category of collateral Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] Federal Home Loan Bank, Advances, Weighted Average Interest Rate [Abstract] Federal Home Loan Bank, Advances, Weighted Average Interest Rate [Abstract] Deferred tax asset, net Deferred Income Tax Assets, Net Activity within accumulated other comprehensive income (loss), net of tax Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Supplemental Employee Retirement Plan Supplemental Employee Retirement Plans [Member] Supplemental Employee Retirement Plans [Member] First Company Statutory Trust 2001 First Company Statutory Trust 2001 [Member] First Company Statutory Trust 2001 Due after ten years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Residential mortgage-backed securities Residential Mortgage-Backed Securities [Member] Finance lease liabilities Total present value of lease payments Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Net income Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Derivatives Deferred Tax Assets, Derivative Instruments Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Nonaccrual interest income reversed Financing Receivable, Accrued Interest, Writeoff Minimum number of hours required to be considered eligible for employer discretionary contribution Minimum Number Of Hours Required To Be Considered Eligible For Employer Discretionary Contribution Minimum Number of Hours Required to be Considered Eligible for Employer Discretionary Contribution of the Profit Sharing Plan. Stock-based Compensation Plan Share-Based Payment Arrangement [Text Block] Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Three Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Three Cash received from acquisition Cash and cash equivalents Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Allowance for credit loss, off-balance sheet credit exposure Off-Balance-Sheet, Credit Loss, Liability Maturing three years through four years Finance Lease, Liability, to be Paid, Rolling Year Four Assets Assets Assets [Abstract] Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Two Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year Two Underlying Security Market Price Change Underlying Security Market Price Change, Percent Other Commitments [Axis] Other Commitments [Axis] Debt Instrument [Axis] Debt Instrument [Axis] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Due after one year through five years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Fair Value of Assets and Liabilities Fair Value Disclosures [Text Block] Employee Benefit Plans Retirement Benefits [Text Block] Business Combination Business Combination [Line Items] Stockholders’ Equity Equity, Attributable to Parent [Abstract] Proceeds from short-term Federal Reserve Bank Term Funding Proceeds from Short-Term Debt Summary of loan modifications Financing Receivable, Modified [Table Text Block] Proceeds from redemption of equity securities Proceeds from Sale of Federal Home Loan Bank Stock Fair value hedge relationships on the income statement Effect of Fair Value Hedges on Results of Operations [Abstract] Total debt securities Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value Accruing loans 30-59 days past due Financial Asset, 30 to 59 Days Past Due [Member] Long-term Operating Lease, Liability, Noncurrent Entity Voluntary Filers Entity Voluntary Filers Wheatland and Rocky Mountain Bank Community Financial Group, Inc. And Rocky Mountain Bank Division Of HTLF Bank [Member] Community Financial Group, Inc. And Rocky Mountain Bank Division Of HTLF Bank Maturing two years through three years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Three Financing receivable, modified, commitment to lend Financing Receivable, Modified, Commitment to Lend Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Retirement Plan Name [Domain] Retirement Plan Name [Domain] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Well capitalized requirement, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum Municipal Bonds Municipal Bonds [Member] Maturing within one year Lessee, Operating Lease, Liability, to be Paid, Next Rolling 12 Months Debt securities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Marketable Securities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Marketable Securities Other borrowed funds Interest Expense, Other Depreciation and amortization Depreciation, Nonproduction FNB (UT) Statutory Trust I FNBUTStatutoryTrustIMember [Member] FNB (UT) Statutory Trust I All other states State and Local Tax Jurisdiction, Other [Member] Impairment losses on receivables related to contracts with customers Capitalized Contract Cost, Accumulated Impairment Total assets measured at fair value on a recurring basis Assets, Fair Value Disclosure Capital conservation buffer Capital Conservation Buffer To Risk Weighted Assets Current Year Capital Conservation Buffer as a percentage of risk-weighted assets required for the current year. Provision for credit losses Total provision for credit losses Provision for Loan, Lease, and Other Losses Acquisitions Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) [Abstract] Number of Securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Deposits [Abstract] Deposits [Abstract] Financial Asset, Past Due Financial Asset, Past Due [Member] Finance Leases, ROU assets Finance Lease, Right-of-Use Asset, before Accumulated Amortization Number of operating segments Number of Operating Segments 401(k) and Profit Sharing Plan Defined Contribution Plan [Member] Defined Contribution Plan [Member] Fair value of servicing rights Servicing Asset at Fair Value, Amount Net amortization of debt securities Accretion (Amortization) of Discounts and Premiums, Investments Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Summary of core deposit intangibles Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] 401(k) and Profit Sharing Plans Defined Benefit Plan, Expected Future Employer Contributions [Abstract] Accumulated Other Comprehensive Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Number of reporting units subsequent to aggregation for goodwill assessment Number of Reporting Units Summary of consolidated income tax expense Income Tax Expense (Benefit), Continuing Operations [Abstract] Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Business Combination, Recognized Liability Assumed, Liability [Abstract] Business Combination, Recognized Liability Assumed, Liability [Abstract] Origination of loans held for sale Payment for Origination and Purchase, Loan, Held-for-Sale Name Trading Arrangement, Individual Name Loans held for sale, at fair value Loan, Held-for-Sale, Fair Value Disclosure Other Expenses Other Operating Income and Expense [Text Block] Business development Business Development Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Condensed Statements of Operations and Comprehensive Income Statement of Operations [Abstract] Statement of operations. Fair value of Company shares issued Business Combination, Consideration Transferred, Equity Interest Banking and Thrift, Interest [Abstract] Name Awards Close in Time to MNPI Disclosures, Individual Name Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Outstanding commitments Other Commitment ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Percent rate for non-elective safe harbor contribution as component of profit sharing plan Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Stifel Nicolaus And Co 2022 Stifel Nicolaus And Co 2022 [Member] Stifel Nicolaus And Co 2022 Available-for-Sale, Fair Value Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Finance lease liability maturity Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Employee Benefit Plans Defined Contribution Plan Disclosure [Line Items] Condensed statements of operations and comprehensive income Condensed Income Statement [Table Text Block] Due after ten years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years Auditor Firm ID Auditor Firm ID Investment Program, Proportional Amortization Method, Applied, Income Tax Credit And Other Tax Benefit Amortization, Statement Of Income Or Comprehensive Income ExtensibleEnumeration NotDisclosedFlag Investment Program, Proportional Amortization Method, Applied, Income Tax Credit And Other Tax Benefit Amortization, Statement Of Income Or Comprehensive Income ExtensibleEnumeration NotDisclosedFlag Investment Program, Proportional Amortization Method, Applied, Income Tax Credit And Other Tax Benefit Amortization, Statement Of Income Or Comprehensive Income ExtensibleEnumeration NotDisclosedFlag Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Debt Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] (Losses) Gains on Available-For-Sale and Transferred Debt Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Other tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent Interest Expense Interest Expense, Operating and Nonoperating [Abstract] Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Revenue Recognition Revenue [Policy Text Block] Purchases of available-for-sale debt securities Payments to Acquire Debt Securities, Available-for-Sale Preferred shares, $0.01 par value per share, 1,000,000 shares authorized, none issued or outstanding Preferred Stock, Value, Issued State and local governments US States and Political Subdivisions Debt Securities [Member] Service charges and other fees Service Charges And Other Fees Service Charges and Other Fees on Deposit Accounts. Defined Contribution Plan [Table] Defined Contribution Plan [Table] Accrued interest payable Accrued interest payable Interest Payable Subordinated debentures Balance Subordinated Debt Term loans originated fiscal year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Total liabilities assumed Business Combination, Recognized Liability Assumed, Liability Servicing Asset at Amortized Cost, Balance [Roll Forward] Servicing Asset at Amortized Cost, Balance [Roll Forward] Financing Receivables, Period Past Due [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Moody's: A1, A2 or A3 Ratings Moody's, A1, A2 or A3 Ratings [Member] A1, A2 or A3 credit ratings as defined by the external credit rating agency, Moody's. Summary of net deferred tax asset Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Advances from Federal Home Loan Banks [Abstract] Advance from Federal Home Loan Bank [Abstract] Finance Leases, Net ROU assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Business assets Business Assets [Member] Business Assets Residential real estate loans Interest and Fee Income, Loans, Consumer, Real Estate Subordinated Debentures Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Text Block] Junior subordinated debenture owed to unconsolidated subsidiary trust. Mergers and acquisition expenses Business Combination, Integration-Related Cost, Expense Home Equity Home Equity Portfolio Segment [Member] Portfolio segment of the company's total financing receivables related to home equity loans. Repurchase agreements and other borrowed funds Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Commitments and Contingent Liabilities Commitments and Contingencies Gross Charge-Offs, originated current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Net cash received from acquisitions Cash Acquired from Acquisition Core deposit intangible Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Terms of Subordinated Debentures Terms of Subordinated Debentures Abstract Terms of subordinated debentures. 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Interest income on investment securities Interest Income [Member] Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process Mortgage Loans in Process of Foreclosure, Amount Net deferred tax asset Deferred Tax Assets, Net PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Accruing loans 60-89 days past due Financial Asset, 60 to 89 Days Past Due [Member] Hedging Designation [Axis] Hedging Designation [Axis] Federal Home Loan Bank, Advance, Maturity, Year Five Federal Home Loan Bank, Advance, Maturity, Year Five Maximum number of consecutive quarters for deferral of interest payments on trust preferred securities Maximum Number Of Consecutive Quarters For Deferral Of Interest Payments On Trust Preferred Securities Maximum Number Of Consecutive Quarters For Deferral Of Interest Payments On Trust Preferred Securities ACL on held-to-maturity debt securities Debt Securities, Held-to-Maturity, Allowance for Credit Loss Amount of gain reclassified from OCI to interest expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Derivative Contract [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Gross realized losses Debt Securities, Available-for-Sale, Realized Loss Debt Instruments [Abstract] Debt Instruments [Abstract] Federal Home Loan Bank, Advance, Maturity, Year Two Federal Home Loan Bank, Advance, Maturity, Year Two All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Residential Real Estate Residential Real Estate [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Net additions to premises and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Term Extension and Payment Deferral Payment Deferral And Extended Maturity [Member] Payment Deferral And Extended Maturity Disposal Group Classification [Axis] Disposal Group Classification [Axis] Repurchase agreements Securities Sold under Agreements to Repurchase [Member] Non-accrual loans with no ACL Financing Receivable, Nonaccrual, No Allowance Federal Home Loan Bank advances Interest Expense Federal Home Loan Bank Advance Interest expense federal home loan bank advance. Gross Charge-Offs, originated four years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Letters of credit Letters of Credit [Member] An irrevocable undertaking (typically by a financial institution) to guarantee payment of a specified financial obligation. Summary of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Debt Securities Schedule of Marketable Securities [Line Items] [Line Items] for Schedule of Marketable Securities [Table] [Table] Other borrowed funds Other borrowings Other Borrowings Other Commercial Commercial Portfolio Segment [Member] Net change in other assets and other liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Net interest income and non-interest income Business Combination, Pro Forma Information, Pro Forma Revenue Colorado COLORADO Other Comprehensive Income (Loss),Fair Value Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Other Comprehensive Income (Loss),Fair Value Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Other Comprehensive Income (Loss),Fair Value Hedge, Gain (Loss), after Reclassification and Tax Age of employee Defined Contribution Plan Age Of Employee Employee age threshold for determination of maximum annual contributions per employee. Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Percentage of consolidated stockholders equity exceeding which no borrower had outstanding loans or commitments Percentage of Consolidated Stockholders Equity Exceeding Which no Borrower had Outstanding Loans or Commitments Percentage of consolidated stockholders equity exceeding which no borrower had outstanding loans or commitments. Provision for credit losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Deposits acquired Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deposits Amount of deposits assumed at the acquisition date Due within one year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Idaho IDAHO Earnings Per Share [Abstract] Earnings Per Share [Abstract] Mortgage servicing rights Deferred Tax Liabilities, Mortgage Servicing Rights Securities sold under agreements to repurchase Interest Expense, Securities Sold under Agreements to Repurchase Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, after Year Five Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, after Year Five Gross Charge-Offs, originated two years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Gain (loss) on fair value hedges recognized in earnings Gain (Loss) on Fair Value Hedges Recognized in Earnings Thereafter Finance Lease, Liability, to be Paid, after Rolling Year Five Non-accrual loans with ACL Financing Receivable Nonaccrual With Allowance Amount of financing receivable on nonaccrual status with allowance for credit loss. Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Award Timing Disclosures [Line Items] New market tax credits Effective Income Tax Rate Reconciliation, Tax Credit, New Market, Amount Effective Income Tax Rate Reconciliation, Tax Credit, New Market, Amount Proceeds from sales and calls of debt securities and associated gains and losses Gain (Loss) on Securities [Table Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Assets with a recorded change from re-measuring at fair value on a non-recurring basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Amortization Servicing Asset at Amortized Cost, Amortization Net increase in securities sold under agreements to repurchase Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase State Deferred State and Local Income Tax Expense (Benefit) Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Gross Unrealized Gains Securities, Gross Unrealized Gain Accumulated In Investments Amount of accumulated unrealized gain before deducting unrealized loss on investments in available-for-sale and held-to-maturity securities impacting investments. Loans receivable, net Loans receivable, net Loans receivable Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Proceeds from loans held for sale Proceeds from Sale, Loan, Mortgage, Held-for-Sale Net Income Net Income Net income Net Income (Loss) Attributable to Parent Operating Leases Operating Lease, Liability [Abstract] Actual, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Actual Lease income Operating Lease, Lease Income, Lease Payments Income tax return jurisdictions and years subject to examination Summary of Income Tax Examinations [Table Text Block] Summary of effective tax rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Preferred shares, authorized (in shares) Preferred Stock, Shares Authorized Adoption Date Trading Arrangement Adoption Date Subordinated debentures owed to trust subsidiaries Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Member] Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Member] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Hedged Asset, Statement of Financial Position [Extensible Enumeration] Hedged Asset, Statement of Financial Position [Extensible Enumeration] Prepaid assets Deferred Tax Liabilities, Prepaid Expenses Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Acquisitions (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Acquisitions During Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Acquisitions During Period Retained earnings - substantially restricted Retained earnings Retained Earnings (Accumulated Deficit) Residential Real Estate Residential Portfolio Segment [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Held-to-maturity Debt Securities, Held-to-Maturity, Sale or Transfer of Investment [Abstract] Purchases of held-to-maturity debt securities Payments to Acquire Held-to-Maturity Securities Bank-owned life insurance income, net Life Insurance, Corporate or Bank Owned, Change in Value (Losses) Gains on Derivatives Used for Cash Flow Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Maximum percentage of annual compensation allowable for contribution by eligible employees Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Dividends from subsidiaries Investment Income, Dividend Net Core Deposit Intangibles and Aggregate Amortization Expense Finite-Lived Intangible Assets, Net [Abstract] Credit quality indicators for RRE and consumer loans Financing Receivable Credit Quality Indicators 2 [Table Text Block] Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other Deferred Tax Liabilities, Other Statement [Table] Statement [Table] Deferred tax (benefit) expense Total deferred income tax (benefit) expense Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] External Credit Rating, Moody's [Domain] External Credit Rating, Moody's [Domain] Variable Rate [Domain] Variable Rate [Domain] S&P: AA+, AA or AA- Ratings Standard & Poor's, AA+, AA or AA- Ratings [Member] AA+, AA or AA- credit ratings as defined by the external credit rating agency, Standard & Poor's. Long-term Finance Lease, Liability, Noncurrent Lessor Leases Lessor, Leases [Policy Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Cost Approach Valuation, Cost Approach [Member] Contractual Interest Rate Reduction Contractual Interest Rate Reduction [Member] Total before mortgage-backed securities Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value Amendment Flag Amendment Flag Income tax benefit related to compensation expense Share-Based Payment Arrangement, Expense, Tax Benefit Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Fair Value Debt Securities, Fair Value Fair value of investments in debt securities classified as available-for sale and held-to-maturity. Loans receivable acquired, gross principal and contractual interest due Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Gross Contractual Amount Termination Date Trading Arrangement Termination Date Interest bearing cash deposits Interest-Bearing Deposits in Banks and Other Financial Institutions Cash consideration Cash Consideration For Outstanding Shares Cash Consideration For Outstanding Shares Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] 2028 Time Deposit Maturities, Year Three Allowance for credit losses Balance at beginning of period Balance at end of period Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Subordinated debentures Subordinated Debt Obligations, Fair Value Disclosure Operating Leases, Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Net interest income and non-interest income Business Combination, Acquiree's Revenue since Acquisition Date, Actual Income tax penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Average outstanding shares - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Variable interest entities amortization and other expenses VIE Write-Downs, Losses And Other Expenses Write-downs, Losses and Other Expenses related to Variable Interest Entities. Basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] PCD loans acquired, allowance for credit loss Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Estimated Amortization Expense Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Available-For-Sale and Transferred Securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Expenses Costs and Expenses [Abstract] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Montana MONTANA Unrealized gains on available-for-sale securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Stock-based Compensation Plans Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Proceeds from sale of marketable equity securities Payments for Proceeds from Non Marketable Equity Securities Payments for proceeds from non-marketable equity securities. Maturing within one year Finance Lease, Liability, to be Paid, Next Rolling 12 Months Equity securities, realized gain (loss) Equity Securities, FV-NI, Realized Gain (Loss) Options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Use of Estimates Use of Estimates, Policy [Policy Text Block] Actual, Amount Banking Regulation, Total Capital, Actual Finance Leases, Operating cash flows Finance Lease, Interest Payment on Liability Occupancy and equipment Occupancy, Net Insider Trading Arrangements [Line Items] Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Current Performing Financial Asset, Not Past Due [Member] Moody's: Aa1, Aa2 or Aa3 Ratings Moody's, Aa1, Aa2 or Aa3 Ratings [Member] Aa1, Aa2 or Aa3 credit rating as defined by the external credit rating agency, Moody's. ACL on available-for-sale debt securities Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Total liabilities Total liabilities Liabilities Regulatory assessments and insurance General Insurance And Federal Deposit Insurance Corporation Premium Expense The expense in the period incurred with respect to protection provided by insurance entities against risks other than risks associated with production, including the amount of expense for Federal Deposit Insurance Corporation (FDIC) insurance. Interest rate locks Interest Rate Lock Commitments [Member] Total before mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost % of Total Class of Financing Receivable Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Common stock, $0.01 par value per share, 234,000,000 shares authorized Common stock Common Stock, Value, Outstanding Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Tax credit period Tax Credit Period The period in which an investor receives tax credits from a tax credit project. Other real estate owned and foreclosed assets Other Real Estate, Foreclosed Assets, and Repossessed Assets Variable Rate [Axis] Variable Rate [Axis] Citizens (ID) Statutory Trust I Citizens (ID) Statutory Trust I [Member] Citizens (ID) Statutory Trust I Maturities, prepayments and calls of held-to-maturity debt securities Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Debt securities, held-to-maturity Amortized Cost Total municipal bonds held-to-maturity Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]