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Securities (Schedule of Contractual Maturities of Debt Securities Available-for-Sale) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Debt Securities, Available-for-Sale [Abstract] |  |
Debt securities, available-for-sale, due within one year, Amortized Cost | $ 85,094 |
Debt securities, available-for-sale, due after one year through five years, Amortized Cost | 1,132,895 |
Debt securities, available-for-sale, due after five years through ten years, Amortized Cost | 1,106,689 |
Debt securities, available-for-sale, due after ten years, Amortized Cost | 2,958,168 |
Debt Securities Available-for-Sale, Amortized Cost | 5,282,846 | $ 5,898,041
Debt securities, available-for-sale, due within one year, Fair Value | 84,216 |
Debt securities, available-for-sale, due after one year through five years, Fair Value | 1,055,150 |
Debt securities, available-for-sale, due after five years through ten years, Fair Value | 973,108 |
Debt securities, available-for-sale, due after ten years, Fair Value | 2,476,625 |
Debt Securities Available-for-Sale, Fair Value | 4,589,099 | 5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One | 0 |
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five | 301,515 |
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year Five through Ten | 916,571 |
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 | 816,706 |
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Total | 2,034,792 | 2,148,327
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value | 0 |
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 265,831 |
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 775,931 |
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | 681,016 |
Debt Securities, Held-to-maturity, Fair Value, Total | $ 1,722,778 | $ 2,122,606

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