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Investment Securities - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | $ 242,518 |
Available-for-sale investments, After 1 through 5 years | 156,682 |
Available-for-sale investments, After 5 through 10 years | 180,278 |
Available-for-sale investments, After ten years | 531,172 |
Available-for-sale investments, Fair Value | $ 1,110,650 | $ 1,171,572
Available-for-sale, Weighted average yield, One year or less (in hundredths) | 2.01% |
Available-for-sale , Weighted average yield,After 1 through 5 years (in hundredths) | 2.49% |
Available-for-sale, Weighted average yield,After 5 through 10 years (in hundredths) | 2.26% |
Available-for-sale , Weighted average yield,After ten years (in hundredths) | 1.82% |
Available-for-sale , Weighted average yield,Total (in hundredths) | 2.03% |
Available-for-sale, Full Tax-equivalent yield, One year or less (in hundredths) | 2.10% |
Available-for-sale, Full Tax-equivalent yield,After 1 through 5 years (in hundredths) | 2.94% |
Available-for-sale, Full Tax-equivalent yield, After 5 through 10 years (in hundredths) | 2.71% |
Available-for-sale, Full Tax-equivalent yield,After ten years (in hundredths) | 1.84% |
Available-for-sale, Full Tax-equivalent yield,Total (in hundredths) | 2.19% |
Held-to-maturity, Maturity [Abstract] |  |
Held-to-maturity, One Year or less | $ 0 |
Held-to-maturity, After1 through 5 years | 0 |
Held-to-maturity, After 5 through 10 years | 0 |
Held-to-maturity, After ten years | 2,277 |
Held-to-maturity | $ 2,277 | 2,286
Held To Maturity Weighted average yield, One year or less | 0.00% |
Held To Maturity Weighted average yield, After 1 through 5 years | 0.00% |
Held To Maturity Weighted average yield After 5 through 10 years | 0.00% |
Held To Maturity Weighted average yield After ten years | 0.00% |
Held To Maturity Weighted average yield ,Total | 0.00% |
Held To Maturity, Full tax-equivalent yield , One year or less | 0.00% |
Held To Maturity, Full tax-equivalent yield , After 1 through 5 years | 0.00% |
Held To Maturity, Full tax-equivalent yield , After 5 through 10 years | 0.00% |
Held To Maturity, Full tax-equivalent yield , After ten years | 0.00% |
Held To Maturity, Full tax-equivalent yield , Total | 0.00% |
U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies |  |
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | $ 176,425 |
Available-for-sale investments, After 1 through 5 years | 23,157 |
Available-for-sale investments, After 5 through 10 years | 0 |
Available-for-sale investments, After ten years | 0 |
Available-for-sale investments, Fair Value | 199,582 | 211,656
Obligations of States and Political Subdivisions |  |
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | 24,140 |
Available-for-sale investments, After 1 through 5 years | 105,238 |
Available-for-sale investments, After 5 through 10 years | 146,166 |
Available-for-sale investments, After ten years | 1,522 |
Available-for-sale investments, Fair Value | 277,066 | 288,616
Mortgage-backed Securities: GSE Residential |  |
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | 3,257 |
Available-for-sale investments, After 1 through 5 years | 4,817 |
Available-for-sale investments, After 5 through 10 years | 33,330 |
Available-for-sale investments, After ten years | 529,650 |
Available-for-sale investments, Fair Value | 571,054 | 602,300
Other Securities |  |
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | 38,696 |
Available-for-sale investments, After 1 through 5 years | 23,470 |
Available-for-sale investments, After 5 through 10 years | 782 |
Available-for-sale investments, After ten years | 0 |
Available-for-sale investments, Fair Value | 62,948 | 69,000
Other Investments |  |
Held-to-maturity, Maturity [Abstract] |  |
Held-to-maturity, One Year or less | 0 |
Held-to-maturity, After1 through 5 years | 0 |
Held-to-maturity, After 5 through 10 years | 0 |
Held-to-maturity, After ten years | 2,277 |
Held-to-maturity | $ 2,277 | $ 2,286

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