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Fair Value Measurements - Schedule of Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Assets    
Interest-bearing deposits with other banks $ 566,733 $ 684,001
Investment securities held-to-maturity 757,238 774,947
Federal Reserve and Federal Home Loan Bank stock 27,685 28,327
Bank owned life insurance 339,844 335,177
Liabilities    
Interest-bearing deposits 978,330 1,038,154
Carrying Value    
Assets    
Cash and due from banks 12,626 11,692
Interest-bearing deposits with other banks 566,733 684,001
Investment securities available-for-sale 930,314 976,770
Investment securities held-to-maturity 841,273 854,780
Federal Reserve and Federal Home Loan Bank stock 27,685 28,327
Loans held for sale 55,702 90,650
Loans held for investment 6,938,560 7,280,459
Bank owned life insurance 339,844 335,177
Annuity investment 11,796 12,061
Accrued interest receivable 38,823 41,373
Liabilities    
Noninterest-bearing deposits 1,488,668 1,433,952
Interest-bearing deposits 4,264,455 4,662,967
Time deposits 2,838,376 3,036,687
Long-term borrowings 76,511 76,428
Accrued interest payable 8,726 10,798
Carrying Value | Interest Rate Product    
Assets    
Interest rate product 23,553 24,332
Liabilities    
Interest rate product 28,244 23,942
Fair Value    
Assets    
Cash and due from banks 12,626 11,692
Interest-bearing deposits with other banks 566,733 684,001
Investment securities available-for-sale 930,314 976,770
Investment securities held-to-maturity 757,238 774,947
Loans held for sale 55,702 90,650
Loans held for investment 6,784,673 7,093,276
Bank owned life insurance 339,844 335,177
Annuity investment 11,796 12,061
Accrued interest receivable 38,823 41,373
Liabilities    
Noninterest-bearing deposits 1,488,668 1,433,952
Interest-bearing deposits 4,264,455 4,662,967
Time deposits 2,844,719 3,050,951
Long-term borrowings 81,167 80,329
Accrued interest payable 8,726 10,798
Fair Value | Interest Rate Product    
Assets    
Interest rate product 23,553 24,332
Liabilities    
Interest rate product 28,244 23,942
Fair Value | Quoted Prices  (Level 1)    
Assets    
Cash and due from banks 12,626 11,692
Interest-bearing deposits with other banks 0 0
Investment securities available-for-sale 0 0
Investment securities held-to-maturity 0 0
Federal Reserve and Federal Home Loan Bank stock 0 0
Loans held for sale 0 0
Loans held for investment 0 0
Bank owned life insurance 0 0
Annuity investment 0 0
Accrued interest receivable 0 0
Liabilities    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 0 0
Time deposits 0 0
Long-term borrowings 0 0
Accrued interest payable 0 0
Fair Value | Quoted Prices  (Level 1) | Interest Rate Product    
Assets    
Interest rate product 0 0
Liabilities    
Interest rate product 0 0
Fair Value | Significant Other Observable Inputs  (Level 2)    
Assets    
Cash and due from banks 0 0
Interest-bearing deposits with other banks 566,733 684,001
Investment securities available-for-sale 930,314 976,770
Investment securities held-to-maturity 757,238 774,947
Federal Reserve and Federal Home Loan Bank stock 0 0
Loans held for sale
Loans held for investment 0 0
Bank owned life insurance 339,844 335,177
Annuity investment 11,796 12,061
Accrued interest receivable 38,823 41,373
Liabilities    
Noninterest-bearing deposits 1,488,668 1,433,952
Interest-bearing deposits 4,264,455 4,662,967
Time deposits 2,844,719 3,050,951
Long-term borrowings 81,167 80,329
Accrued interest payable 8,726 10,798
Fair Value | Significant Other Observable Inputs  (Level 2) | Interest Rate Product    
Assets    
Interest rate product 23,553 24,332
Liabilities    
Interest rate product 28,244 23,942
Fair Value | Significant Other  Unobservable Inputs  (Level 3)    
Assets    
Cash and due from banks 0 0
Interest-bearing deposits with other banks 0 0
Investment securities available-for-sale 0 0
Investment securities held-to-maturity 0 0
Federal Reserve and Federal Home Loan Bank stock 0 0
Loans held for sale 55,702 90,650
Loans held for investment 6,784,673 7,093,276
Bank owned life insurance 0 0
Annuity investment 0 0
Accrued interest receivable 0 0
Liabilities    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 0 0
Time deposits 0 0
Long-term borrowings 0 0
Accrued interest payable 0 0
Fair Value | Significant Other  Unobservable Inputs  (Level 3) | Interest Rate Product    
Assets    
Interest rate product 0 0
Liabilities    
Interest rate product $ 0 $ 0