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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 | Mar. 31, 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 | $ (13,952)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 685,984
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (2,719)
Available-for-sale Securities, Estimated fair value, 12 months or more | 150,571
Available-for-sale Securities, Gross unrealized losses, Total | (16,671)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 836,555
Commercial |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | (30)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 10,416
Available-for-sale Securities, Gross unrealized losses, Total | (30)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 10,416
Agency Mortgage-Backed Securities [Member] | Agency Securities |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | (8,814)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 489,231
Available-for-sale Securities, Gross unrealized losses, Total | (8,814)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 489,231
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 | (3,841)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 143,201
Available-for-sale Securities, Gross unrealized losses, Total | (3,841)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 143,201
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 | (1,267)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 43,136
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (2,719)
Available-for-sale Securities, Estimated fair value, 12 months or more | 150,571
Available-for-sale Securities, Gross unrealized losses, Total | (3,986)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | $ 193,707

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