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Fair Value of Assets and Liabilities (Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | $ 511,095 | $ 482,328
Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 511,095 | 482,328
Derivative financial instruments and interest rate swap agreements, asset | 13,296 | 12,135
Derivative financial instruments and interest rate swap agreements, liability | 13,633 | 13,198
U.S. Treasury |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 29,592 | 76,226
U.S. Government-sponsored enterprises (GSEs) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 19,404 | 39,188
Municipal securities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 34,230 | 17,690
Other Debt Securities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 24,931 | 39,435
Mortgage-backed securities (GSEs) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 402,938 | 309,789
Fair Value, Recurring |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 511,095 | 482,328
Total assets at fair value | 524,391 | 494,463
Derivative financial instruments and interest rate swap agreements, liability |  | 13,198
Fair Value, Recurring | Interest Rate Swap Liability |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative financial instruments and interest rate swap agreements, liability | 13,633 |
Fair Value, Recurring | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 511,095 | 482,328
Total assets at fair value | 524,391 | 494,463
Derivative financial instruments and interest rate swap agreements, liability |  | 13,198
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Interest Rate Swap Liability |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative financial instruments and interest rate swap agreements, liability | 13,633 |
Fair Value, Recurring | U.S. Treasury |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 29,592 | 76,226
Fair Value, Recurring | U.S. Treasury | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 29,592 | 76,226
Fair Value, Recurring | U.S. Government-sponsored enterprises (GSEs) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 19,404 | 39,188
Fair Value, Recurring | U.S. Government-sponsored enterprises (GSEs) | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 19,404 | 39,188
Fair Value, Recurring | Municipal securities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 34,230 | 17,690
Fair Value, Recurring | Municipal securities | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 34,230 | 17,690
Fair Value, Recurring | Other Debt Securities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 24,931 | 39,435
Fair Value, Recurring | Other Debt Securities | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 24,931 | 39,435
Fair Value, Recurring | Mortgage-backed securities (GSEs) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 402,938 | 309,789
Fair Value, Recurring | Mortgage-backed securities (GSEs) | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value, post ASU 2019-04 | 402,938 | 309,789
Fair Value, Recurring | Interest Rate Swap |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative financial instruments and interest rate swap agreements, asset | 13,296 | 12,135
Fair Value, Recurring | Interest Rate Swap | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Derivative financial instruments and interest rate swap agreements, asset | $ 13,296 | $ 12,135

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