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Investment Securities (Investments Gross Unrealized Losses and Fair Value) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | $ 362,944 | $ 773,484
Securities available for sale, Less than 12 months, Unrealized Losses | 50,739 | 10,039
Securities available for sale, 12 months or longer, Fair Value | 602,243 | 172,180
Securities available for sale, 12 months or longer, Unrealized Losses | 133,550 | 4,727
Securities available for sale, Fair Value, Total | 965,187 | 945,664
Securities available for sale, Unrealized Losses, Total | 184,289 | 14,766
Total Securities, Less than 12 months, Fair Value | 362,944 | 773,484
Total Securities, Less than 12 months, Unrealized Losses | 50,739 | 10,039
Total Securities, 12 months or longer, Fair Value | 602,243 | 172,180
Total Securities, 12 months or longer, Unrealized Losses | 133,550 | 4,727
Total Securities, Fair Value | 965,187 | 945,664
Total Securities, Unrealized Losses | 184,289 | 14,766
U.S. Government Agency And Government Sponsored Enterprises [Member] |  |
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | 13,506 | 9,438
Securities available for sale, Less than 12 months, Unrealized Losses | 1,494 | 97
Securities available for sale, 12 months or longer, Fair Value | 7,601 |
Securities available for sale, 12 months or longer, Unrealized Losses | 1,934 |
Securities available for sale, Fair Value, Total | 21,107 | 9,438
Securities available for sale, Unrealized Losses, Total | 3,428 | 97
Collateralized Mortgage Obligations [Member] | Federal National Mortgage Association [Member] |  |
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | 1,086 | 13,364
Securities available for sale, Less than 12 months, Unrealized Losses | 100 | 433
Securities available for sale, 12 months or longer, Fair Value | 8,994 | 0
Securities available for sale, 12 months or longer, Unrealized Losses | 2,389 |
Securities available for sale, Fair Value, Total | 10,080 | 13,364
Securities available for sale, Unrealized Losses, Total | 2,489 | 433
Collateralized Mortgage Obligations [Member] | Federal Home Loan Mortgage Corporation [Member] |  |
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | 7,874 | 24,780
Securities available for sale, Less than 12 months, Unrealized Losses | 1,528 | 477
Securities available for sale, 12 months or longer, Fair Value | 10,028 |
Securities available for sale, 12 months or longer, Unrealized Losses | 2,611 |
Securities available for sale, Fair Value, Total | 17,902 | 24,780
Securities available for sale, Unrealized Losses, Total | 4,139 | 477
Mortgage-Backed Securities [Member] |  |
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | 349,438 | 764,046
Securities available for sale, Less than 12 months, Unrealized Losses | 49,245 | 9,942
Securities available for sale, 12 months or longer, Fair Value | 594,642 | 172,180
Securities available for sale, 12 months or longer, Unrealized Losses | 131,616 | 4,727
Securities available for sale, Fair Value, Total | 944,080 | 936,226
Securities available for sale, Unrealized Losses, Total | 180,861 | 14,669
Mortgage-Backed Securities [Member] | Federal National Mortgage Association [Member] |  |
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | 216,629 | 333,489
Securities available for sale, Less than 12 months, Unrealized Losses | 27,834 | 3,597
Securities available for sale, 12 months or longer, Fair Value | 257,242 | 61,249
Securities available for sale, 12 months or longer, Unrealized Losses | 55,178 | 1,645
Securities available for sale, Fair Value, Total | 473,871 | 394,738
Securities available for sale, Unrealized Losses, Total | 83,012 | 5,242
Mortgage-Backed Securities [Member] | Federal Home Loan Mortgage Corporation [Member] |  |
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | 95,195 | 283,965
Securities available for sale, Less than 12 months, Unrealized Losses | 15,907 | 3,353
Securities available for sale, 12 months or longer, Fair Value | 249,599 | 110,931
Securities available for sale, 12 months or longer, Unrealized Losses | 58,727 | 3,082
Securities available for sale, Fair Value, Total | 344,794 | 394,896
Securities available for sale, Unrealized Losses, Total | 74,634 | 6,435
Mortgage-Backed Securities [Member] | Government National Mortgage Association [Member] |  |
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item] |  |
Securities available for sale, Less than 12 months, Fair Value | 28,654 | 108,448
Securities available for sale, Less than 12 months, Unrealized Losses | 3,876 | 2,082
Securities available for sale, 12 months or longer, Fair Value | 68,779 |
Securities available for sale, 12 months or longer, Unrealized Losses | 12,711 |
Securities available for sale, Fair Value, Total | 97,433 | 108,448
Securities available for sale, Unrealized Losses, Total | $ 16,587 | $ 2,082

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