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Available-for-Sale and Held-to-Maturity Securities (Schedule of Gross Unrealized Losses and Estimated Fair Value by Length of Time) (Details) $ in Thousands | Dec. 31, 2023 USD ($)
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Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | $ (1,872)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 101,651
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (174,078)
Available-for-sale Securities, Estimated fair value, 12 months or more | 1,447,240
Available-for-sale Securities, Gross unrealized losses, Total | (175,950)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 1,548,891
U.S. Government Agency Securities [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | 0
Available-for-sale Securities, Estimated fair value, Less than 12 months | 0
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (162)
Available-for-sale Securities, Estimated fair value, 12 months or more | 1,775
Available-for-sale Securities, Gross unrealized losses, Total | (162)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 1,775
Corporate Fixed Income Securities [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | (152)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 8,297
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (58,818)
Available-for-sale Securities, Estimated fair value, 12 months or more | 547,864
Available-for-sale Securities, Gross unrealized losses, Total | (58,970)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 556,161
Mortgage-Backed Securities [Member] | Agency Securities [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | (382)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 24,584
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (108,904)
Available-for-sale Securities, Estimated fair value, 12 months or more | 721,586
Available-for-sale Securities, Gross unrealized losses, Total | (109,286)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 746,170
Mortgage-Backed Securities [Member] | Commercial [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | 0
Available-for-sale Securities, Estimated fair value, Less than 12 months | 0
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (3,655)
Available-for-sale Securities, Estimated fair value, 12 months or more | 66,671
Available-for-sale Securities, Gross unrealized losses, Total | (3,655)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 66,671
Mortgage-Backed Securities [Member] | Non Agency Mortgage Backed Securities [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | 0
Available-for-sale Securities, Estimated fair value, Less than 12 months | 0
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (13)
Available-for-sale Securities, Estimated fair value, 12 months or more | 261
Available-for-sale Securities, Gross unrealized losses, Total | (13)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 261
Asset-Backed Securities [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | (1,338)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 68,770
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (2,526)
Available-for-sale Securities, Estimated fair value, 12 months or more | 109,083
Available-for-sale Securities, Gross unrealized losses, Total | (3,864)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | $ 177,853

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