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Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Assets |  |
Total available-for-sale securities, Fair value, | $ 2,067,956 | $ 2,255,336
Collateralized Loan Obligations [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 218,028 | 247,854
Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 2,067,956 | 2,255,336
Other assets | 12,881 | 13,285
Liabilities |  |
Other liabilities | (5,839) | (4,620)
Total |  |
Net Assets (Liabilities) | 2,074,998 | 2,264,001
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets |  |
Other assets | 108 | 517
Total |  |
Net Assets (Liabilities) | 108 | 517
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 2,067,956 | 2,255,336
Other assets | 12,773 | 12,768
Liabilities |  |
Other liabilities | (3,539) | (2,320)
Total |  |
Net Assets (Liabilities) | 2,077,190 | 2,265,784
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) |  |
Liabilities |  |
Other liabilities | (2,300) | (2,300)
Total |  |
Net Assets (Liabilities) | (2,300) | (2,300)
US Treasury and Government [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 12,969 | 32,503
US Treasury and Government [Member] | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 12,969 | 32,503
US Treasury and Government [Member] | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 12,969 | 32,503
US Government-sponsored Enterprises Debt Securities [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 19,668 | 19,592
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 19,668 | 19,592
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 19,668 | 19,592
Residential - Government agency |  |
Assets |  |
Total available-for-sale securities, Fair value, | 9,335 | 10,182
Residential - Government agency | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 9,335 | 10,182
Residential - Government agency | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 9,335 | 10,182
Residential - Government-sponsored enterprises |  |
Assets |  |
Total available-for-sale securities, Fair value, | 721,145 | 783,297
Residential - Government-sponsored enterprises | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 721,145 | 783,297
Residential - Government-sponsored enterprises | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 721,145 | 783,297
Commercial - Government agency |  |
Assets |  |
Total available-for-sale securities, Fair value, | 208,228 | 218,674
Commercial - Government agency | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 208,228 | 218,674
Commercial - Government agency | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 208,228 | 218,674
Commercial - Government-sponsored enterprises |  |
Assets |  |
Total available-for-sale securities, Fair value, | 82,492 | 86,431
Commercial - Government-sponsored enterprises | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 82,492 | 86,431
Commercial - Government-sponsored enterprises | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 82,492 | 86,431
Commercial - Non-government mortgage | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 22,000 | 21,683
Commercial - Non-government mortgage | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 22,000 | 21,683
Government agency |  |
Assets |  |
Total available-for-sale securities, Fair value, | 434,856 | 471,150
Government agency | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 434,856 | 471,150
Government agency | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 434,856 | 471,150
Government-sponsored enterprises |  |
Assets |  |
Total available-for-sale securities, Fair value, | 339,235 | 363,970
Government-sponsored enterprises | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 339,235 | 363,970
Government-sponsored enterprises | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 339,235 | 363,970
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member] |  |
Assets |  |
Total available-for-sale securities, Fair value, | 218,028 | 247,854
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | $ 218,028 | $ 247,854

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