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Fair Value Disclosures - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value $ 540,483 $ 482,453
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount 0  
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount 0  
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount 0  
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount 0  
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 540,483 482,453
Interest rate swaps agreements for customer loans 1,334 1,326
Derivative financial instruments and interest rate swap agreements 2,552 4,893
US Treasury Securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 229,913 137,758
US Government-sponsored Enterprises Debt Securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 506 21,801
Municipal securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 55,241 67,820
Other Debt Securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 28,540 27,220
Mortgage-backed securities (GSEs) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 226,283 227,854
Fair Value, Recurring [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 540,483 482,453
Total assets at fair value 541,817 483,779
Derivative financial instruments and interest rate swap agreements 2,552 4,893
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 540,483 482,453
Total assets at fair value 541,817 483,779
Derivative financial instruments and interest rate swap agreements 2,552 4,893
Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 229,913 137,758
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 229,913 137,758
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 506 21,801
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 506 21,801
Fair Value, Recurring [Member] | Municipal securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 55,241 67,820
Fair Value, Recurring [Member] | Municipal securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 55,241 67,820
Fair Value, Recurring [Member] | Other Debt Securities [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 28,540 27,220
Fair Value, Recurring [Member] | Other Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 28,540 27,220
Fair Value, Recurring [Member] | Mortgage-backed securities (GSEs) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 226,283 227,854
Fair Value, Recurring [Member] | Mortgage-backed securities (GSEs) [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value 226,283 227,854
Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value   1,326
Interest rate swaps agreements for customer loans 1,334  
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities available-for-sale, at fair value   $ 1,326
Interest rate swaps agreements for customer loans $ 1,334