Fair Value of Assets and Liabilities - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		$ 483,893
Securities available-for-sale, at fair value, post ASU 2019-04	$ 385,131
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		483,893
Securities available-for-sale, at fair value, post ASU 2019-04	385,131
Derivative financial instruments and interest rate swap agreements, asset	16,191	11,834
Derivative financial instruments and interest rate swap agreements, liability	17,647	13,110
US Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		223,653
Securities available-for-sale, at fair value, post ASU 2019-04	73,733
US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		1,575
Securities available-for-sale, at fair value, post ASU 2019-04	60,953
Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		18,611
Securities available-for-sale, at fair value, post ASU 2019-04	17,505
Other Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		30,551
Securities available-for-sale, at fair value, post ASU 2019-04	30,626
Mortgage-backed securities (GSEs) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		$ 209,503
Securities available-for-sale, at fair value, post ASU 2019-04	$ 202,314
Interest Rate Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Interest Rate Swap Liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		$ 483,893
Securities available-for-sale, at fair value, post ASU 2019-04	$ 385,131
Total assets at fair value	401,322	495,727
Derivative financial instruments and interest rate swap agreements, liability		13,110
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		483,893
Securities available-for-sale, at fair value, post ASU 2019-04	385,131
Total assets at fair value	401,322	495,727
Derivative financial instruments and interest rate swap agreements, liability		13,110
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		223,653
Securities available-for-sale, at fair value, post ASU 2019-04	73,733
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		223,653
Securities available-for-sale, at fair value, post ASU 2019-04	73,733
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		1,575
Securities available-for-sale, at fair value, post ASU 2019-04	60,953
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		1,575
Securities available-for-sale, at fair value, post ASU 2019-04	60,953
Fair Value, Recurring [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value		18,611
Securities available-for-sale, at fair value, post ASU 2019-04	17,505
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		18,611
Securities available-for-sale, at fair value, post ASU 2019-04	17,505
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		30,551
Securities available-for-sale, at fair value, post ASU 2019-04	30,626
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		30,551
Securities available-for-sale, at fair value, post ASU 2019-04	30,626
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		209,503
Securities available-for-sale, at fair value, post ASU 2019-04	202,314
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		209,503
Securities available-for-sale, at fair value, post ASU 2019-04	202,314
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments and interest rate swap agreements, asset	16,191	11,834
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments and interest rate swap agreements, asset	16,191	$ 11,834
Fair Value, Recurring [Member] | Interest Rate Swap Liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments and interest rate swap agreements, liability	17,647
Fair Value, Recurring [Member] | Interest Rate Swap Liability | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments and interest rate swap agreements, liability	$ 17,647