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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 | 9 Months Ended
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Sep. 30, 2017 USD ($)
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Gross unrealized losses, Less than 12 months | $ (3,346)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 395,637
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (9,808)
Available-for-sale Securities, Estimated fair value, 12 months or more | 461,141
Available-for-sale Securities, Gross unrealized losses, Total | (13,154)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 856,778
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss | (5,790)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 620,211
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss | (8,636)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 264,225
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total | (14,426)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total | 884,436
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 | (19)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 4,686
Available-for-sale Securities, Gross unrealized losses, Total | (19)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 4,686
State And Municipal 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 | (11)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 3,054
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (3,316)
Available-for-sale Securities, Estimated fair value, 12 months or more | 68,907
Available-for-sale Securities, Gross unrealized losses, Total | (3,327)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 71,961
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 | (820)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 213,865
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (1,822)
Available-for-sale Securities, Estimated fair value, 12 months or more | 171,610
Available-for-sale Securities, Gross unrealized losses, Total | (2,642)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 385,475
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss | (41)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 9,965
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total | (41)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total | 9,965
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 | (1,554)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 22,457
Available-for-sale Securities, Gross unrealized losses, Total | (1,554)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 22,457
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss | (30)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 35,198
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss | (1,786)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 42,920
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total | (1,816)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total | 78,118
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 | (942)
Available-for-sale Securities, Estimated fair value, Less than 12 months | 151,575
Available-for-sale Securities, Gross unrealized losses, 12 months or more | (1,527)
Available-for-sale Securities, Estimated fair value, 12 months or more | 147,738
Available-for-sale Securities, Gross unrealized losses, Total | (2,469)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 299,313
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss | (5,719)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 575,048
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss | (6,850)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 221,305
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total | (12,569)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total | 796,353
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 | (3,143)
Available-for-sale Securities, Estimated fair value, 12 months or more | 71,293
Available-for-sale Securities, Gross unrealized losses, Total | (3,143)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | 71,293
Mortgage Backed Securities [Member] | Non-Agency [Member] |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |
Available-for-sale Securities, Estimated fair value, 12 months or more | 1,593
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total | $ 1,593

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