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
	Sep. 30, 2015 USD ($)
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Less than 12 months	$ (2,239)
Less than 12 months	205,556
12 months or more	(4,618)
12 months or more	181,791
Total	(6,857)
Total	387,347
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(73)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	9,122
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(3,003)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	117,707
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(3,076)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	126,829
U.S. Government Agency Securities [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Less than 12 months	(2)
Less than 12 months	131
Total	(2)
Total	131
State And Municipal Securities [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Less than 12 months	(519)
Less than 12 months	36,731
12 months or more	(1,408)
12 months or more	35,773
Total	(1,927)
Total	72,504
Corporate Fixed Income Securities [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Less than 12 months	(595)
Less than 12 months	25,102
Total	(595)
Total	25,102
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(385)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	49,783
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(385)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	49,783
Asset-Backed Securities [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Less than 12 months	(1,073)
Less than 12 months	137,510
12 months or more	(2,921)
12 months or more	137,224
Total	(3,994)
Total	274,734
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(73)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	9,122
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(2,578)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	64,675
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(2,651)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	73,797
Mortgage-backed securities [Member] | Agency [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
12 months or more	(289)
12 months or more	8,794
Total	(289)
Total	8,794
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(27)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,309
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(27)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	2,309
Mortgage-backed securities [Member] | Commercial [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Less than 12 months	(4)
Less than 12 months	3,474
Total	(4)
Total	3,474
Mortgage-backed securities [Member] | Non-Agency [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Less than 12 months	(46)
Less than 12 months	2,608
Total	(46)
Total	2,608
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(13)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	940
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(13)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	$ 940