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Financial Instruments - Summary of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities at fair value $ 7,262 $ 8,566
Securities available for sale, at fair value (Note 2) 490,804 529,749
Loans to other financial institutions 23,763 0
Noninterest-bearing deposits 531,962 599,579
Interest-bearing deposits 1,551,995 1,518,424
Reported Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 144,673 43,943
Equity securities at fair value 7,262 8,566
Securities available for sale, at fair value (Note 2) 490,804 529,749
Securities held to maturity 414,743 425,906
Federal Home Loan Bank Stock and Federal Reserve Bank Stock 9,514 8,581
Loans held for sale 5,222 4,834
Loans to other financial institutions   0
Core loans, net   1,182,163
Accrued interest receivable 10,491 8,949
Interest rate lock commitments 60 28
Mortgage loan servicing rights 3,944 4,322
Interest rate derivative contracts Assets 29,900 9,204
Noninterest-bearing deposits 531,962 599,579
Interest-bearing deposits 1,551,995 1,518,424
Brokered deposits 49,238  
Borrowings 180,000 50,000
Subordinated debentures 35,446 35,262
Accrued interest payable 3,906 610
Interest rate derivative contracts Liability 0 5,823
Estimate of Fair Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 144,673 43,943
Equity securities at fair value 7,262 8,566
Securities available for sale, at fair value (Note 2) 490,804 529,749
Securities held to maturity 334,625 353,901
Federal Home Loan Bank Stock and Federal Reserve Bank Stock 9,514 8,581
Loans held for sale 5,378 4,979
Loans to other financial institutions   0
Core loans, net   1,123,198
Accrued interest receivable 10,491 8,949
Interest rate lock commitments 60 28
Mortgage loan servicing rights 6,050 5,855
Interest rate derivative contracts Assets 29,900 9,204
Noninterest-bearing deposits 531,962 599,579
Interest-bearing deposits 1,549,272 1,514,294
Brokered deposits 49,137  
Borrowings 179,041 50,000
Subordinated debentures 30,751 30,304
Accrued interest payable 3,906 610
Interest rate derivative contracts Liability 0 5,823
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 144,673 43,943
Equity securities at fair value 4,543 6,024
Securities available for sale, at fair value (Note 2) 77,032 78,204
Securities held to maturity 0 0
Federal Home Loan Bank Stock and Federal Reserve Bank Stock 0 0
Loans held for sale 0 0
Loans to other financial institutions   0
Core loans, net   0
Accrued interest receivable 0 0
Interest rate lock commitments 0 0
Mortgage loan servicing rights 0 0
Interest rate derivative contracts Assets 0 0
Noninterest-bearing deposits 531,962 599,579
Interest-bearing deposits 0 0
Brokered deposits 0  
Borrowings 0 0
Subordinated debentures 0 0
Accrued interest payable 0 0
Interest rate derivative contracts Liability 0 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Equity securities at fair value 0 0
Securities available for sale, at fair value (Note 2) 413,772 451,545
Securities held to maturity 322,107 338,583
Federal Home Loan Bank Stock and Federal Reserve Bank Stock 9,514 8,581
Loans held for sale 5,378 4,979
Loans to other financial institutions   0
Core loans, net   0
Accrued interest receivable 10,491 8,949
Interest rate lock commitments 60 28
Mortgage loan servicing rights 6,050 5,855
Interest rate derivative contracts Assets 29,900 9,204
Noninterest-bearing deposits 0 0
Interest-bearing deposits 1,549,272 1,514,294
Brokered deposits 49,137  
Borrowings 179,041 50,000
Subordinated debentures 30,751 30,304
Accrued interest payable 3,906 610
Interest rate derivative contracts Liability 0 5,823
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Equity securities at fair value 2,719 2,542
Securities available for sale, at fair value (Note 2) 0 0
Securities held to maturity 12,518 15,318
Federal Home Loan Bank Stock and Federal Reserve Bank Stock 0 0
Loans held for sale 0 0
Loans to other financial institutions   0
Core loans, net   1,123,198
Accrued interest receivable 0 0
Interest rate lock commitments 0 0
Mortgage loan servicing rights 0 0
Interest rate derivative contracts Assets 0 0
Noninterest-bearing deposits 0 0
Interest-bearing deposits 0 0
Brokered deposits 0  
Borrowings 0 0
Subordinated debentures 0 0
Accrued interest payable 0 0
Interest rate derivative contracts Liability $ 0 $ 0