Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Satisfactory Satisfactory [Member] Satisfactory [Member] Federal funds purchased Federal Funds Purchased Statistical Measurement [Domain] Statistical Measurement [Domain] Carrying amount of available-for-sale securities and approximate fair values and realized gains and losses Debt Securities, Available-for-Sale [Table Text Block] Underlying Asset Class [Axis] Underlying Asset Class [Axis] Forfeiture of common stock Forfeiture of common stock Value of stock related to Restricted Stock Awards forfeited during the period. Award Timing Predetermined Award Timing Predetermined [Flag] 2026 (excluding the three months ended March 31, 2026) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Other short-term borrowings, including FHLB daily reset advances Short-Term Debt And Federal Funds Purchased Short-Term Debt And Federal Funds Purchased Amortization of tax credit real estate investments Investment Program, Proportional Amortization Method, Applied, Amortization Expense Entity File Number Entity File Number Paid in Capital Additional Paid-in Capital [Member] Interest rate swap Interest Rate Swap [Member] Loss from equity method investments Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Total Financing Receivable, Allowance for Credit Loss, Writeoff, Net Financing Receivable, Allowance for Credit Loss, Writeoff, Net Leases [Abstract] Leases [Abstract] Earnings per share: Earnings Per Share, Basic [Abstract] 2025 Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year Effect of New Financial Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Charge-offs Total Financing Receivable, Allowance for Credit Loss, Writeoff Cash payments for: Cash Payments For [Abstract] Cash Payments For [Abstract] Carrying value and estimated fair values of entity's financial instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Federal Funds Purchased Federal Funds Purchased [Member] Gross Unrealized (Losses) Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Fair Value By Balance Sheet Grouping Disclosure Item Amounts [Axis] Measurement Basis [Axis] Basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Percent Available for sale, securities percentage of total securities This item represents the available for sale percentage of total securities. Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Commercial and financial Commercial And Financial Loans Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents commercial and financial loans held as presented on the statement of financial position which are due the Company as of the balance sheet date. Letters of credit Letters Of Credit Fair Value Disclosure Offbalance Sheet Risks Amount Liability The fair value of letters of credit financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. Number of period within which average appraisals obtained Period within which average appraisals obtained Represents period within which average appraisals obtained. Discount Rate Measurement Input, Discount Rate [Member] Other comprehensive income (loss), net of tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Other short-term borrowings Short-Term Debt Increase in accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Measurement Input Type [Domain] Measurement Input Type [Domain] Carrying values of investment securities Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Schedule of assets measured at fair value on a nonrecurring basis Fair Value Measurements, Nonrecurring [Table Text Block] (Increase) decrease in other assets Increase (Decrease) in Other Operating Assets Interest paid on other obligations Interest paid on other obligations Cash payments of interest on short-term borrowings and long term borrowings associated with Federal Home Loan Bank advances. Mortgage, farmland Farmland Mortgage Loans Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents mortgage loans on farmland held as presented on the statement of financial position which are due the Company as of the balance sheet date. Share-based compensation Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Loans, net of allowance for credit losses March 31, 2026 $56,601; December 31, 2025 $58,204 Loans and receivable, net Financing Receivable, after Allowance for Credit Loss Income taxes paid Income Taxes Paid Excise tax on shares repurchased Share Repurchase Program, Excise Tax Taxable Interest Income, Securities, Operating, Taxable Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Total Stockholders' Equity Less Maximum Cash Obligation Related to ESOP Shares Beginning Balance Ending Balance Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Common stock, authorized (in shares) Common Stock, Shares Authorized Hedging Designation [Domain] Hedging Designation [Domain] Mortgage, commercial Commercial Mortgage Loan Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents commercial mortgage loans held as presented on the statement of financial position which are due the Company as of the balance sheet date. Financial instrument assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Mortgage, multi-family Real estate mortgage multi family [Member] Refers to financing receivables related to real state mortgage, multi-family consumer. Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues Total Liabilities & Stockholders' Equity Liabilities and Equity Recurring Basis Fair Value, Recurring [Member] Financing Receivable, Allowance For Credit Loss, Writeoff, By Origination Year [Abstract] Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] FHLB borrowings Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-Term Federal funds purchased, interest rate Federal Funds Purchased, Average Rate Paid LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Transfers to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Federal funds sold Interest Income, Federal Funds Sold Accounting Policies [Abstract] Accounting Policies [Abstract] Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Net decrease in other short-term borrowings Increase (Decrease) In Short-Term Borrowings Increase (Decrease) In Short-Term Borrowings Due over ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Maturities of lease liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Limited partnership, capital contribution Limited Partners' Contributed Capital Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Treasury Stock Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Total operating lease liabilities Operating Lease, Liability Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount 90 Days or More Past Due 90+ Days Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] 2023 Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Liabilities Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Deferral period Financial effect, weighted average years 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 Investment securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] (Increase) decrease in accrued interest payable and other liabilities Increase (Decrease) in Other Accounts Payable and Accrued Liabilities % of Total Class of Financing Receivable Financing Receivable, Excluding Accrued Interest, Modified In Period, To Total Financing Receivables, Percentage Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Derivatives used in cash flow hedging relationships: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Total interest expense Interest Expense, Operating Each Limited Partnership Each Limited Partnership [Member] Each Limited Partnership Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Schedule of impaired loan information Schedule of impaired loan information [Table Text Block] Tabular disclosure of impaired loan information during the period. Net increase in deposits Increase (Decrease) in Deposits Proceeds from maturities of investment securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Available-for-sale Securities Reconciliation [Abstract] Available for sale Securities Reconciliation [Abstract] Available for sale Securities Reconciliation [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Increase in unrecognized tax benefits is reasonably possible Increase in Unrecognized Tax Benefits is Reasonably Possible Less maximum cash obligation related to ESOP shares Unearned ESOP Shares Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Award Timing Method Award Timing Method [Text Block] Operating lease, option to termination term Lessee, Operating Lease, Option To Termination Term Lessee, Operating Lease, Option To Termination Term Award Type Award Type [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Available-for-sale securities, debt maturities [Abstract] Available-for-Sale Securities, Debt Maturities [Abstract] Total Assets Assets 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Mortgage, commercial Real Estate Mortgage Commercial [Member] Refers to financing receivables related to commercial real estate mortgages. Collateralized Securities Collateralized Securities [Member] Nontaxable Interest Income, Securities, Operating, Tax Exempt Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Entity Address, City or Town Entity Address, City or Town Cash Flows from Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Change related to ESOP shares Change Related To Esop Shares Change in value of stock related to the Employee Stock Ownership Plan. Collateral loans Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged Entity Emerging Growth Company Entity Emerging Growth Company Cash dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] 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] Recognized in Income on Derivatives Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax Number of assisted living rental properties Number of assisted living rental properties Number of assisted living rental properties Observable Market Prices Fair Value, Inputs, Level 2 [Member] Off-balance sheet liability [Line Items] Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Loans held for sale Financing Receivable, Held-For-Sale Financing Receivable, Held-For-Sale Noninterest income Noninterest Income Common shares outstanding at the beginning of the period (in shares) Common Stock, Shares, Outstanding Net gain on sale of loans Net gain on sales of loans Gain (Loss) on Sales of Loans, Net PEO PEO [Member] Loans and Allowance for Credit Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Noninterest expenses: Noninterest Expense [Abstract] Available-for-sale securities classified as per contractual maturities Investments Classified by Contractual Maturity Date [Table Text Block] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Net unamortized fees and costs Finance Receivable, Unamortized Loan Fee (Cost) Finance Receivable, Unamortized Loan Fee (Cost) Less than 12 months Less than Twelve Months [Abstract] Less than Twelve Months [Abstract] Noncash activities: Noncash Investing and Financing Items [Abstract] Total Fair Value, Net Asset (Liability) 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] Financial instrument with off-balance sheet risk: Financial instrument with off balance sheet risk [Abstract] Financial instrument with off balance sheet risk [Abstract] 2026 Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Outside services Outside services Amount of expense that may include items, such as courier services, data processing, ATM fees, OREO expense, telephone expense, credit card processing, debit card processing, and merchant card processing expense. Weighted average number of net shares redeemed (in shares) Weighted Average Number of Shares Issued (Redeemed), Basic Weighted Average Number of Shares Issued (Redeemed), Basic Retained Earnings Retained Earnings [Member] Interest rate concession Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Beginning of period End of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Income taxes Income Tax Expense (Benefit) Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Good Good [Member] Good [Member] Percentage Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Percentage, Unrealized Loss Refers to percentage of unrealized loss. Property acquired through extinguishment of loan receivable Property Acquired Through Extinguishment Of Loan Receivable Property Acquired Through Extinguishment Of Loan Receivable Interest Expense Interest Expense [Member] Other assets Other Assets Nonrecurring Basis Fair Value, Nonrecurring [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Modified [Table] Other noninterest income Noninterest Income, Other Credit loss (benefit) expense Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Commercial and financial Commercial And Financial [Member] Refers to financing receivables related to commercial and financial loans. Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Securities available for sale Debt Securities, Available-for-Sale [Abstract] Hedging Relationship [Axis] Hedging Relationship [Axis] Purchases of stock of Federal Home Loan Bank Payments to Acquire Federal Home Loan Bank Stock Office supplies and postage Supplies and Postage Expense Loan commitments Loan Commitments Fair Value Disclosure Offbalance Sheet Risks Amount Liability The fair value of loan commitment financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total financial instrument liabilities Liabilities, Fair Value Disclosure Tax credit real estate Tax Credit Real Estate, Policy [Policy Text Block] Tax Credit Real Estate, Policy Mortgage, 1 to 4 family junior liens Mortgage1 To4 Family Residential Junior Liens Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents mortgage loans on 1 to 4 family residential real estate with a junior lien position held as presented on the statement of financial position which are due the Company as of the balance sheet date. Amortization of operating lease right of use assets Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Income taxes Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent Issuance of common stock purchased under the employee stock purchase plan (in shares) Stock Issued During Period Shares Employee Stock Purchase Plan Number of shares issued during the period as a result of an employee stock purchase plan. City Area Code City Area Code Schedule of changes in allowance for loan losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] 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] Maximum Cash Obligation Related to ESOP Shares Deferred Compensation, Share-Based Payments [Member] Monitor Monitor [Member] Monitor rated loans are supported by adequate payment capacity, are adequately collateralized and are performing according to the established terms and conditions. However, the loan requires more than average monitoring due to a potential weakness. Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Cash Flows from Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash and cash equivalents provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accrued interest receivable Interest Receivable Principal payments on short-term FHLB borrowings Repayments of Short-Term Debt Proceeds from sales of investment securities available for sale Sale proceeds Proceeds from Sale of Debt Securities, Available-for-Sale Proceeds on sale of other real estate owned Proceeds from Sale of Other Real Estate Cash Flow Hedging Cash Flow Hedging [Member] Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Net interest income Interest Income (Expense), Operating Other liabilities Other Liabilities Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Accrued interest receivable Accrued Interest Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This element represents the fair value of accrued interest receivable. Depreciation Depreciation Statement, Equity Components [Axis] Equity Components [Axis] Equity Components [Axis] Outstanding letters of credit Standby Letters of Credit [Member] Occupancy Occupancy Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, building and equipment rent, utilities, and property taxes. Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Percentage Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less Than Twelve Months, Percentage, Unrealized Loss Refers to percentage of unrealized loss for less than twelve months. Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value, Total Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Equipment Equipment [Member] Reportable segments Number of Reportable Segments Loans Held For Investment Loans Held For Investment [Member] Loans Held For Investment Supplemental Disclosures Supplemental Cash Flow Information [Abstract] Investment securities available for sale, amortized cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Other Performance Measure, Amount Other Performance Measure, Amount Entity Address, State or Province Entity Address, State or Province Substandard Substandard [Member] Unearned restricted stock compensation APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Special Mention Special Mention [Member] Available-for-sale debt securities and the allowance for credit losses on available-for-sale debt securities Marketable Securities, Policy [Policy Text Block] Debt, unused borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Cash dividends Dividends Commercial, real estate and home construction Commercial Real Estate and Home Construction Loan Commitment [Member] Commitment to extend credit for commercial, real estate and home construction purposes. Real Estate Real Estate [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Financial instrument liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Summary of computation of basic and diluted earnings per share [Abstract] Earnings Per Share Reconciliation [Abstract] Paid in capital Additional Paid in Capital, Common Stock Net cash and cash equivalents 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] Accrued interest payable Accrued Interest Payable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This element represents the fair value of accrued interest payable. Document Fiscal Year Focus Document Fiscal Year Focus Mortgage-backed securities and collateralized mortgage obligations Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Operating lease, right-of-use asset Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Prior period within which impairment is being measured Prior period within which impairment is being measured Represents prior period within which impairment is being measured. 2023 Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year Purchase of state tax credits Income Tax Credits and Adjustments Entity Interactive Data Current Entity Interactive Data Current Operating lease cost Operating Lease, Cost Number of additional share authorized to repurchase under the program (in shares) Stock Repurchase Program, Number Of Additional Shares Authorized To Be Repurchased Stock Repurchase Program, Number Of Additional Shares Authorized To Be Repurchased 2024 Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Carrying Amount Reported Value Measurement [Member] Real estate: Real Estate [Abstract] Home equity loans Home Equity Line of Credit [Member] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Modified [Line Items] Loans to individuals Loans to individuals [Member] Refers to financing receivables related to individual consumer loans. Trust fees Fiduciary and Trust [Member] Equity [Abstract] Equity [Abstract] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Total Non-accrual loans Financing Receivable, Nonaccrual Interest income: Interest and Dividend Income, Operating [Abstract] Noninterest expenses Noninterest Expense Segment Reporting Segment Reporting Disclosure [Text Block] U.S. Treasury US Treasury Securities [Member] Fair Value, Assets and Liabilities Measured on Recurring [Line Items] Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Deposits Interest Expense, Deposits New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Deposits Deposits, Interest-Bearing and Noninterest-Bearing, Alternative [Abstract] 2026 Financing Receivable, Year One, Originated, Current Fiscal Year Noninterest income: Noninterest Income [Abstract] Revolving Loans Amortized Cost Basis Financing Receivable, Revolving Construction, 1 to 4 family residential Construction 1 To 4 Family Residential Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents construction, 1 to 4 family residential loans held as presented on the statement of financial position which are due the Company as of the balance sheet date. Ownership [Domain] Ownership [Domain] U.S. Government Agency and GSE securities Other Debt Obligations [Member] Other comprehensive income on cash flow hedges 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] Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Maximum number of share authorized to repurchase under the program (in shares) Share Repurchase Program, Authorized, Number of Shares Weighted Average Weighted Average [Member] AOCI before tax AOCI before Tax, Attributable to Parent Deferred income taxes, net Deferred Income Tax Assets, Net Components of accumulated other comprehensive loss (AOCI) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Net loss on sale of other real estate owned and other repossessed assets Net (gain) loss on sale of other real estate owned and other repossessed assets The net (gain) loss resulting from sales and other disposals of other real estate owned, (increases) decreases in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession. Entity Central Index Key Entity Central Index Key PEO Name PEO Name 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] Schedule of credit quality indicators by type of loans Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loans originated for sale Payment for Origination, Loan, Mortgage, Held-for-Sale Noninterest-bearing deposits Noninterest-Bearing Deposit Liabilities Arrangement Duration Trading Arrangement Duration Mortgage-backed securities and collateralized mortgage obligations Mortgage-Backed Securities, Other [Member] Mortgage, 1 to 4 family first liens Mortgage, 1 to 4 family first liens Mortgage 1 To 4 Family Residential First Liens Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents mortgage loans on 1 to 4 family residential real estate with a first lien position held as presented on the statement of financial position which are due the Company as of the balance sheet date. Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Obligations of state and political subdivisions Obligations State And Political Subdivisions Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents debt issued by US states and political subdivisions. Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Common stock, par value (in dollars per share) Common Stock, No Par Value Available-for-sale securities, continuous unrealized loss position [Abstract] Available-for-Sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract] Allowance for credit losses on off-balance sheet credit exposures Beginning balance Ending balance Impact of adopting ASC 326 Off-Balance-Sheet, Credit Loss, Liability Compensation expensed through issuance of common stock Compensation expensed through issuance of common stock This element represents the amount of recognized share-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). ASSETS Assets [Abstract] Additional limited partnership capital contribution due, if circumstances met Additional Limited Partners' Contributed Capital Due, If Circumstances Met Additional Limited Partners' Contributed Capital Due, If Circumstances Met Underlying Security Market Price Change Underlying Security Market Price Change, Percent Total Amortized cost basis of collateral dependent loans Financing Receivable, before Allowance for Credit Loss Debt Instrument [Axis] Debt Instrument [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] STOCKHOLDERS' EQUITY Equity, Attributable to Parent [Abstract] 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] Proceeds from the issuance of short-term FHLB borrowings Proceeds from Short-Term Debt Entity Address, Address Line One Entity Address, Address Line One Schedule of information for modified loans Financing Receivable, Modified [Table Text Block] Proceeds from sale of stock of Federal Home Loan Bank Proceeds from Sale of Federal Home Loan Bank Stock Purchase of shares of common stock Treasury Stock, Value, Acquired, Cost Method Accumulated Other Comprehensive (Loss) AOCI Attributable to Parent [Member] Bank Term Funding Program, interest rate Debt Instrument, Interest Rate, Stated Percentage 30 - 59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] Tax credit real estate Tax credit real estate The Bank has a 99% limited partnership interest in various limited partnerships that hold tax credit real estate rental properties for persons with disabilities, all of which are affordable housing projects. The properties are recorded at cost less accumulated depreciation. Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Mortgage, farmland Real Estate Mortgage Commercial Two [Member] Real Estate Mortgage Commercial Two Off-Balance Sheet, Credit Loss, Liability [Roll Forward] Off-Balance-Sheet, Credit Loss, Liability [Roll Forward] Foreclosed assets Other Real Estate Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This element represents the fair value of other real estate owned by bank. Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Ownership [Axis] Ownership [Axis] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Sales Proceeds and Gross Realized Gains and Losses Debt Securities, Available-for-Sale, Realized Gain (Loss) [Abstract] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Mortgage, farmland Real Estate Mortgage Farmland [Member] Refers to financing receivables related to farmland real estate mortgage. Credit cards Credit Card Commitment [Member] Commitments to extend credit via a credit card for a specified period of time. Salaries and employee benefits Labor and Related Expense Weighted average of potential dilutive shares attributable to stock options granted, computed under the treasury stock method (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Document Quarterly Report Document Quarterly Report Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Total financial instrument assets Assets, Fair Value Disclosure Credit loss expense (benefit) Provision for Loan, Lease, and Other Losses Number of securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Schedule of Fair Value Level 3 Quantitative Information Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Total Past Due Financial Asset, Past Due [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Summary of classes of loans (abstract) Loans, net Loans Loans and Leases Receivable, Net Amount [Abstract] Other Income Other Income [Member] Net accretion of discount on investment securities Accretion (Amortization) of Discounts and Premiums, Investments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Construction, land development and commercial Construction, land development and commercial Construction Land Development And Commercial Loans Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents construction, land development and commercial loans held as presented on the statement of financial position which are due the Company as of the balance sheet date. Schedule of information for borrowings Schedule of Debt [Table Text Block] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Schedule of past due loans [Abstract] Financing Receivable, after Allowance for Credit Loss [Abstract] Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Allowance for Credit Losses Debt Securities, Available-for-Sale, Allowance for Credit Loss Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Issuance of shares of common stock under the employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Federal Home Loan Bank borrowings Advance from Federal Home Loan Bank Interest-bearing deposits Deposits Interest Bearing Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure. This item represents the aggregate of all interest bearing deposit liabilities held by the entity. Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Name Trading Arrangement, Individual Name Summary of assets measured at fair value on a nonrecurring basis [Abstract] Summary of assets measured at fair value on a nonrecurring basis [Abstract] Summary of assets measured at fair value on a nonrecurring basis [Abstract] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Loans, allowance for credit losses Less allowance for credit losses Beginning balance Ending balance ACL Allocation Financing Receivable, Allowance for Credit Loss All Award Types Award Type [Domain] Commercial lines and real estate purchase loans Commercial Lines And Real Estate Purchase Loan Commitment [Member] Commitment to extend credit for commercial lines and real estate purchase purposes. 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Net change in unrealized gain on derivatives Recognized in Other Comprehensive Income (Loss), Amount of Gain Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Short-Term Debt [Table] Short-Term Debt [Table] Prior Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff Equity Awards Adjustments Equity Awards Adjustments [Member] Loans held for sale Loan, Held-for-Sale, Fair Value Disclosure Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Compensation Amount Outstanding Recovery Compensation Amount Contributions payable for investment in tax credit real estate included in other liabilities Contributions For Investment Incurred but Not yet Paid Contributions For Investment Incurred but Not yet Paid Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Estimated Fair Value Estimate of Fair Value Measurement [Member] Certain Significant Estimates Certain Significant Estimates [Policy Text Block] Certain Significant Estimates MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Name Awards Close in Time to MNPI Disclosures, Individual Name Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Reclassification adjustment for net losses realized in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Duration of tax credit of each property Duration of tax credit of each property Duration of tax credit of each property Service charges and fees Deposit Account [Member] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury stock at cost (March 31, 2026 1,590,991 shares; December 31, 2025 1,556,890 shares) Treasury Stock, Value Income taxes OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Appraisal Discount Measurement Input, Appraised Value [Member] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Financial Instruments [Domain] Financial Instruments [Domain] Identification of the gains and losses recognized on the derivative instruments designated as cash flow hedges Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Agricultural Agricultural Loans receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents agricultural loans held as presented on the statement of financial position which are due the Company as of the balance sheet date. Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Minimum Minimum [Member] Net interest income after credit loss expense Interest Income (Expense), after Provision for Loan Loss Summary of carrying value and estimated fair values of entity's financial instruments [Abstract] Summary of carrying value and estimated fair values of entitys financial instruments [Abstract] Summary of carrying value and estimated fair values of entitys financial instruments [Abstract] Net unrealized (loss) on available-for-sale securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Interest expense: Interest Expense, Operating and Nonoperating [Abstract] (Charge-offs), net recoveries Off-Balance Sheet, Allowance For Credit Loss, (Charge-Offs) Net Recoveries Off-Balance Sheet, Allowance For Credit Loss, (Charge-Offs) Net Recoveries Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Schedule of banks commitments Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block] Purchases of investment securities available for sale Payments to Acquire Debt Securities, Available-for-Sale Borrowings Debt Disclosure [Text Block] Loss on sale of investment securities available for sale Gain (Loss) on Sale of Investments Forfeiture of shares of common stock Forfeiture of shares of common stock Value of stock related to Restricted Stock Awards and stock options forfeited during the period. Aggregate Available Trading Arrangement, Securities Aggregate Available Amount State and political subdivisions Obligations of state and political subdivisions US States and Political Subdivisions Debt Securities [Member] Operating lease payments Operating Lease, Payments Accrued interest payable Interest Payable Proceeds from the issuance of common stock through the employee stock purchase plan Proceeds from Stock Plans Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Collateral [Domain] Collateral Held [Domain] Construction, 1 to 4 family residential Real Estate Construction 1 To 4 Family Residential Loans Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents real estate construction of 1 to 4 family residential loans held as presented on the statement of financial position which are due the Company as of the balance sheet date. Accruing Loans Past Due 90 Days or More Financing Receivable, 90 Days or More Past Due, Still Accruing Loans, including fees Interest and Fee Income, Loans and Leases Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Weighted average number of shares (diluted) (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Fair Value Measurements, Recurring [Table] Fair Value Assets And Liabilities Measured On Recurring Basis [Table] Schedule of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a recurring basis in periods after initial recognition (for example, impaired assets). The disclosures that may be required or desired may include, but are not limited to: (a) the fair value measurements recorded during the period and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (level 1, 2, 3) and transfers between levels 1 and 2. Entity Smaller Reporting Company Entity Small Business Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Table] Schedule of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). The disclosures that may be required or desired may include, but are not limited to: (a) the fair value measurements recorded during the period and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (level 1, 2, 3) and transfers between levels 1 and 2. New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Document Transition Report Document Transition Report Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Underlying Securities Award Underlying Securities Amount Short-Term Debt [Line Items] Short-Term Debt [Line Items] Revolving Loans Amortized Cost Basis Financing Receivable, Revolving, Writeoff Gross realized gains Debt Securities, Available-for-Sale, Realized Gain Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Due over ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Income Taxes Income Tax Disclosure [Text Block] Investment securities Investment Securities Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] 60 - 89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] Hedging Designation [Axis] Hedging Designation [Axis] Short-term lease cost Short-Term Lease, Cost Other short-term borrowings Interest Expense, Other Short-Term Borrowings Federal Home Loan Bank Advances, Due 2030 Federal Home Loan Bank Advances, Due 2030 [Member] Federal Home Loan Bank Advances, Due 2030 Firm loan commitments and unused portion of lines of credit [Abstract] Firm loan commitments and unused portion of lines of credit [Abstract] Firm loan commitments and unused portion of lines of credit [Abstract] Document Type Document Type Company Determined Market Prices Fair Value, Inputs, Level 3 [Member] Earnings Per Share Earnings Per Share [Text Block] Cash and cash equivalents: Cash and Cash Equivalent [Abstract] Name Outstanding Recovery, Individual Name Product and Service [Axis] Product and Service [Axis] Federal Home Loan Bank borrowings Long-Term Federal Home Loan Bank Advances Reclassified from AOCI into Income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Number of interest rate swaps held Derivative, Number of Instruments Held Derivative Contract [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Variable lease cost Variable Lease, Cost Fee income Revenue from Contract with Customer, Excluding Assessed Tax Gross realized losses Debt Securities, Available-for-Sale, Realized Loss All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name U.S. Government Agency and GSE securities Other securities [Member] Represents other securities separately not disclosed including FHLB, FHLMC and FNMA. Proceeds on sales of loans Proceeds from Sale, Loan, Held-for-Sale Statistical Measurement [Axis] Statistical Measurement [Axis] 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] Individually assessed loans Financing Receivable, Individually Evaluated for Credit Loss Mortgage, multi-family Mortgage Multi Family Loan Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents multi-family mortgage loans held as presented on the statement of financial position which are due the Company as of the balance sheet date. Nonaccrual with no ACL Financing Receivable, Nonaccrual, No Allowance Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Prior Financing Receivable, Originated, More than Five Years before Current Fiscal Year Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Federal reserve bank discount window federal reserve bank discount window [Member] federal reserve bank discount window Tax effect AOCI Tax, Attributable to Parent Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Total Loans Modified in Last 12 Months Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Readily Available Market Prices Fair Value, Inputs, Level 1 [Member] Principal payments on long-term FHLB borrowings Payments of FHLBank Borrowings, Financing Activities Diluted (in dollars per share) Earnings Per Share, Diluted Percentage Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Twelve Months Or Longer, Percentage, Unrealized Loss Refers to percentage of unrealized loss for twelve months or longer . FDIC insurance assessment Federal Deposit Insurance Corporation Premium Expense Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] 30-89 Days Past Due Financial Asset, 30 to 89 Days Past Due [Member] Financial Asset, 30 to 89 Days Past Due Total interest income Interest Income, Operating Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Schedule of Sales Proceeds and Gross Realized Gains and Losses Schedule of Realized Gain (Loss) [Table Text Block] Schedule of allowance for credit losses for off-balance sheet credit exposure Financing Receivable, Off-Balance Sheet, Allowance For Credit Losses [Table Text Block] Financing Receivable, Off-Balance Sheet, Allowance For Credit Losses [Table Text Block] Furniture, equipment and software Equipment Expense 12 months or more Twelve Months or Longer [Abstract] Twelve Months or Longer [Abstract] Treasury stock at cost (in shares) Treasury Stock, Common, Shares Earnings per share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Agricultural Agricultural [Member] Refers to financing receivables related to agriculture. Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Federal Home Loan Bank borrowings Federal Home Loan Bank Borrowings, Fair Value Disclosure Mortgage, 1 to 4 family junior liens Real estate mortgage one to four family junior liens [Member] Refers to financing receivable related to real estate mortgage, 1 to 4 family junior liens portion of consumer real estate portfolio. Total Loans Receivable Total Loans Receivable Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Average price per share (in dollars per share) Stock Repurchased During Period Price Per Share The average price per share for the period at which the common stock of an entity was repurchased by entity. Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Purchase of common stock (in shares) Common stock purchased during the period (in shares) Treasury Stock, Shares, Acquired Award Timing Disclosures [Line Items] Noninterest-bearing deposits Deposits Non Interest Bearing Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure. This item represents the aggregate of all non-interest bearing deposit liabilities held by the entity. Measurement Frequency [Domain] Measurement Frequency [Domain] Total lease payments Lessee, Operating Lease, Liability, to be Paid Operating lease, renewal term Lessee, Operating Lease, Renewal Term Percentages of impaired loans to loans held for investment (in hundredths) Loans and Leases Receivable, Ratio of Nonperforming Loans to All Loans Stock Repurchase Program Equity [Text Block] Amortized Cost Basis Financing Receivable, Excluding Accrued Interest, Modified In Period, Amount Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. 2022 Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Off-Balance Sheet Risk [Table] Fair Value, off-Balance-Sheet Risk [Table] 2024 Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year Net income Net income (In thousands) Net income Net Income (Loss) Attributable to Parent Available-for-sale securities, continuous unrealized loss position, fair value Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date 2025 Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Construction, land development and commercial Real Estate Construction land development and commercial [Member] Refers to financing receivables related to construction, land development and commercial real estate loans. Other comprehensive income (loss) on securities available for sale Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Property and equipment, net Property, Plant and Equipment, Net Number of multi family rental properties Number of multi family rental properties Number of multi family rental properties Purchase of common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Entity Current Reporting Status Entity Current Reporting Status Operating lease, term Lessee, Operating Lease, Term of Contract Receivables [Abstract] Receivables [Abstract] Federal home loan bank advances, due 2027 Federal Home Loan Bank Advances, Due 2027 [Member] Federal Home Loan Bank Advances, Due 2027 Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Collateral [Axis] Collateral Held [Axis] Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Retained earnings Retained Earnings (Accumulated Deficit) Net loss on the disposal of property Gain (Loss) on Disposition of Property Plant Equipment Financial Instrument [Axis] Financial Instrument [Axis] Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Unrealized Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Loans Financing Receivable [Policy Text Block] Total Real Estate, Accounts Receivable, Equipment, And Other Collateral [Member] Real Estate, Accounts Receivable, Equipment, And Other Collateral [Member] Number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Ownership interest in each limited partnership (or greater) Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Proceeds from the issuance of long-term FHLB borrowings Proceeds from Issuance of Long-Term Debt Current Fiscal Year End Date Current Fiscal Year End Date Interest paid to depositors Interest paid to depositors Cash payment of interest expense on all deposits. Unrealized Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Total deposits Deposits 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] Schedule of classes of loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Statement [Table] Statement [Table] Stock of Federal Home Loan Bank Federal Home Loan Bank Stock (Provision) benefit for deferred income taxes Deferred Income Tax Expense (Benefit) 2022 Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year Cash Flows from Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Other noninterest expense Other Noninterest Expense Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Summary of credit quality indicators by type of loans [Abstract] Summary of credit quality indicators by type of loans [Abstract] Summary of credit quality indicators by type of loans [Abstract] Loans to individuals Loans Receivable Individual Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loans to individuals held as presented on the statement of financial position which are due the Company as of the balance sheet date. Unrealized Loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Schedule 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] Mortgage, 1 to 4 family first liens Real estate mortgage one to four family first liens [Member] Refers to financing receivable related to real estate mortgage, 1 to 4 family first liens portion of consumer real estate portfolio. Investment in securities issued by state and political subdivisions within the state of Iowa Investment in securities issued by state and political subdivisions within Iowa Amount of investment in State of Iowa state and political subdivisions debt and equity securities categorized neither as held-to-maturity nor trading. Unrecognized tax benefits Unrecognized Tax Benefits All Adjustments to Compensation All Adjustments to Compensation [Member] Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Amendment Flag Amendment Flag Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Federal Home Loan Bank borrowings Federal Home Loan Bank, Advance, Maturity, Year One Collateral Pledged Collateral Pledged [Member] Accrued interest receivable on AFS debt securities Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Schedule of past due loans Financing Receivable, Past Due [Table Text Block] Interest-bearing deposits Interest-Bearing Deposit Liabilities Leases Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Net cash and cash equivalents provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Credit loss expense (benefit) Credit loss expense (benefit) Financing Receivable, Credit Loss, Expense (Reversal) Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Individually assessed loans measurement input Financing Receivable, Individually Evaluated for Credit Loss, Measurement Input Financing Receivable, Individually Evaluated for Credit Loss, Measurement Input Weighted average shares outstanding (basic) (in shares) Weighted Average Number of Shares Outstanding, Basic Tax credits acquired through extinguishment of loan receivable Property Acquired Through Extinguishment Of Loan Receivable, Tax Credit Property Acquired Through Extinguishment Of Loan Receivable, Tax Credit Schedule of computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Total Stockholders' Equity Total stockholders' equity Total of all Stockholders' Equity items. Segment Reporting [Abstract] Securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Operating lease expense Operating Lease, Expense Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Entity Tax Identification Number Entity Tax Identification Number Mortgage-backed securities and collateralized mortgage obligations Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Redeemable Common Stock Held by Employee Stock Ownership Plan (ESOP) Temporary Equity, Redeemable Stock Held By Employee Stock Ownership Plan (ESOP) Temporary Equity, Redeemable Stock Held By Employee Stock Ownership Plan (ESOP) Loss on sale of investment securities Debt Securities, Available-for-Sale, Realized Gain (Loss) Net change in unrealized gain (loss) on securities available for sale 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 Total Total unrealized loss position [Abstract] Total unrealized loss position [Abstract] Common stock, issued (in shares) Common Stock, Shares, Issued Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Forfeiture of shares of common stock (in shares) Forfeiture Of Shares Of Common Stock Shares Number of shares related to Restricted Stock Awards and stock options forfeited during the period. Accounting Estimates Use of Estimates, Policy [Policy Text Block] Dividends paid Payments of Dividends Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Advertising and business development Advertising and business development Amount of expense that may include items, such as business and office promotions, advertising expense, shareholder relations, and expense relating to credit card reward points. Insider Trading Arrangements [Line Items] Current Current Financial Asset, Not Past Due [Member] Excellent Excellent [Member] Excellent [Member] Total Liabilities Liabilities Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost, Total Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Common stock, no par value; authorized 20,000,000 shares; issued March 31, 2026 10,340,933 shares; December 31, 2025 10,339,953 shares Common Stock, Value, Outstanding Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Total financial instrument liabilities with off-balance-sheet risk Total financial instrument liabilities with off-balance-sheet risk Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Loans made to customers, net of collections Payments for (Proceeds from) Loans and Leases Construction, 1 to 4 family residential Real Estate Construction One to Four Family Residential [Member] Refers to financing receivables related to construction of 1-4 family residential real estate. Real Estate: Real Estate 1 [Abstract] Real Estate 1 [Abstract] Issuance of shares of common stock Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Summary of certain impaired loan information [Abstract] Summary of certain impaired loan information [Abstract] Summary of certain impaired loan information [Abstract] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Investment securities available for sale at fair value (amortized cost March 31, 2026 $969,159; December 31, 2025 $957,295) Amount Carrying value of investment securities pledged to collateralize short-term borrowings Securities available for sale Debt Securities, Available-for-Sale Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Other short-term borrowings, including FHLB daily reset advances Other Short-Term Borrowings Increase in maximum cash obligation related to ESOP shares Increase in maximum cash obligation related to ESOP shares Increase or decrease in fair value of ESOP including cash distributions to participants. Increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation