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Available-For-Sale And Held-To-Maturity Securities (Schedule Of Gross Unrealized Losses And The Estimated Fair Value By Length Of Time In A Loss Position) (Details) $ in Thousands | Sep. 30, 2021 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 | $ (10,460)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 917,360
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (293)
Available-for-sale Securities, Estimated fair value, 12 months or more | 51,476
Available-for-sale Securities, Gross unrealized losses, Total | (10,753)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 968,836
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 | (6,142)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 618,905
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (2)
Available-for-sale Securities, Estimated fair value, 12 months or more | 332
Available-for-sale Securities, Gross unrealized losses, Total | (6,144)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 619,237
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 | (2,673)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 181,665
Available-for-sale Securities, Gross unrealized losses, Total | (2,673)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 181,665
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 | (1,645)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 116,790
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (291)
Available-for-sale Securities, Estimated fair value, 12 months or more | 51,144
Available-for-sale Securities, Gross unrealized losses, Total | (1,936)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | $ 167,934

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