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Investment Securities (Scheduled Maturities of Securities Available for Sale and Securities Held to Maturity) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Investments [Abstract] |  |
Debt securities available for sale, Due in one year or less, Amortized Cost | $ 5,233 |
Debt securities available for sale, Due from one to five years, Amortized Cost | 80,336 |
Debt securities available for sale, Due after five years through ten years, Amortized Cost | 155,699 |
Debt securities available for sale, Due after ten years, Amortized Cost | 908,207 |
Securities available for sale, Amortized Cost | 1,149,475 | $ 1,184,835
Debt securities available for sale, Due in one year or less, Fair Value | 5,202 |
Debt securities available for sale, Due from one to five years, Fair Value | 75,020 |
Debt securities available for sale, Due after five years through ten years, Fair Value | 135,519 |
Debt securities available for sale, Due after ten years, Fair Value | 749,790 |
Debt securities available for sale, Fair Value | 965,531 | 1,178,515
Debt securities held to maturity, Due in one year or less, Amortized Cost | 34,464 |
Debt securities held to maturity, Due from one to five years, Amortized Cost | 43,515 |
Debt securities held to maturity, Due after five years through ten years, Amortized Cost | 38,024 |
Debt securities held to maturity, Due after ten years, Amortized Cost | 81,540 |
Securities held to maturity, Amortized Cost | 197,543 | 205,586
Debt securities held to maturity, Due in one year or less, Fair Value | 34,223 |
Debt securities held to maturity, Due from one to five years, Fair Value | 41,932 |
Debt securities held to maturity, Due after five years through ten years, Fair Value | 35,284 |
Debt securities held to maturity, Due after ten years, Fair Value | 68,999 |
Securities held to maturity, Fair Value | $ 180,438 | $ 209,820

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