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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, 2019 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 | $ (13,951)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 1,382,566
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (9,920)
Available-for-sale Securities, Estimated fair value, 12 months or more | 659,717
Available-for-sale Securities, Gross unrealized losses, Total | (23,871)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 2,042,283
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss | (31,916)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 2,229,947
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss | (23,280)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 872,189
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total | (55,196)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total | 3,102,136
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 | (22)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 3,173
Available-for-sale Securities, Gross unrealized losses, Total | (22)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 3,173
Non-Agency [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | (28)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 1,146
Available-for-sale Securities, Gross unrealized losses, Total | (28)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 1,146
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 | (106)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 104,241
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (5,310)
Available-for-sale Securities, Estimated fair value, 12 months or more | 505,628
Available-for-sale Securities, Gross unrealized losses, Total | (5,416)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 609,869
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 | (13,794)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 1,273,856
Available-for-sale Securities, Gross unrealized losses, Total | (13,794)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 1,273,856
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss | (31,877)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 2,111,245
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss | (6,973)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 229,646
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total | (38,850)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total | 2,340,891
Mortgage Backed Securities [Member] | Agency [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)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 150
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (1,866)
Available-for-sale Securities, Estimated fair value, 12 months or more | 83,461
Available-for-sale Securities, Gross unrealized losses, Total | (1,867)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 83,611
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss | (39)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 118,702
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss | (16,307)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 642,543
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total | (16,346)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total | 761,245
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, 12 months or more | (2,744)
Available-for-sale Securities, Estimated fair value, 12 months or more | 70,628
Available-for-sale Securities, Gross unrealized losses, Total | (2,744)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | $ 70,628

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