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Investment Securities - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | $ 213,379 |
Available-for-sale investments, After 1 through 5 years | 183,560 |
Available-for-sale investments, After 5 through 10 years | 225,997 |
Available-for-sale investments, After ten years | 589,762 |
Available-for-sale investments, Fair Value | $ 1,212,698 | $ 1,218,985
Available-for-sale, Weighted average yield, One year or less (in hundredths) | 1.56% |
Available-for-sale , Weighted average yield,After 1 through 5 years (in hundredths) | 2.67% |
Available-for-sale, Weighted average yield,After 5 through 10 years (in hundredths) | 2.00% |
Available-for-sale , Weighted average yield,After ten years (in hundredths) | 1.70% |
Available-for-sale , Weighted average yield,Total (in hundredths) | 1.87% |
Available-for-sale, Full Tax-equivalent yield, One year or less (in hundredths) | 1.59% |
Available-for-sale, Full Tax-equivalent yield,After 1 through 5 years (in hundredths) | 2.67% |
Available-for-sale, Full Tax-equivalent yield, After 5 through 10 years (in hundredths) | 1.94% |
Available-for-sale, Full Tax-equivalent yield,After ten years (in hundredths) | 1.71% |
Available-for-sale, Full Tax-equivalent yield,Total (in hundredths) | 1.87% |
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 | 2,979 |
Held-to-maturity | $ 2,979 | 2,954
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 | $ 172,917 |
Available-for-sale investments, After 1 through 5 years | 40,859 |
Available-for-sale investments, After 5 through 10 years | 9,769 |
Available-for-sale investments, After ten years | 0 |
Available-for-sale investments, Fair Value | 223,545 | 220,527
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 | 18,652 |
Available-for-sale investments, After 1 through 5 years | 74,899 |
Available-for-sale investments, After 5 through 10 years | 190,220 |
Available-for-sale investments, After ten years | 1,226 |
Available-for-sale investments, Fair Value | 284,997 | 287,698
Mortgage-backed Securities: GSE Residential |  |
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | 2,544 |
Available-for-sale investments, After 1 through 5 years | 7,981 |
Available-for-sale investments, After 5 through 10 years | 25,211 |
Available-for-sale investments, After ten years | 588,536 |
Available-for-sale investments, Fair Value | 624,272 | 627,880
Other Securities |  |
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] |  |
Available-for-sale investments, One year or less | 19,266 |
Available-for-sale investments, After 1 through 5 years | 59,821 |
Available-for-sale investments, After 5 through 10 years | 797 |
Available-for-sale investments, After ten years | 0 |
Available-for-sale investments, Fair Value | 79,884 | 82,880
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 | 2,979 |
Held-to-maturity | $ 2,979 | $ 2,954

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