Securities (Details) - Securities In An Unrealized Loss Position (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014 security	Dec. 31, 2013 security
Collateralized Mortgage Obligations
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities (securities)	59	67
Fair Value - Less Than 12 Months	$ 15,653	$ 338,064
Unrealized Losses - Less Than 12 Months	139	14,288
Fair Value - 12 Months or Longer	312,418	57,269
Unrealized Losses - 12 Months or Longer	9,838	2,333
Fair Value - Total	328,071	395,333
Unrealized Losses - Total	9,977	16,621
Other Mortgage Backed Securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities (securities)	11	19
Fair Value - Less Than 12 Months	173	57,311
Unrealized Losses - Less Than 12 Months	2	2,281
Fair Value - 12 Months or Longer	41,570	356
Unrealized Losses - 12 Months or Longer	825	1
Fair Value - Total	41,743	57,667
Unrealized Losses - Total	827	2,282
Municipal Securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities (securities)	92	154
Fair Value - Less Than 12 Months	1,318	65,370
Unrealized Losses - Less Than 12 Months	8	3,245
Fair Value - 12 Months or Longer	57,298	27,565
Unrealized Losses - 12 Months or Longer	1,341	2,353
Fair Value - Total	58,616	92,935
Unrealized Losses - Total	1,349	5,598
Trust-preferred collateralized debt obligations
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities (securities)	5	6
Fair Value - Less Than 12 Months	0	0
Unrealized Losses - Less Than 12 Months	0	0
Fair Value - 12 Months or Longer	18,369	18,309
Unrealized Losses - 12 Months or Longer	26,652	28,223
Fair Value - Total	18,369	18,309
Unrealized Losses - Total	26,652	28,223
Equity Securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities (securities)	1	1
Fair Value - Less Than 12 Months	0	2,168
Unrealized Losses - Less Than 12 Months	0	90
Fair Value - 12 Months or Longer	2,238	0
Unrealized Losses - 12 Months or Longer	55	0
Fair Value - Total	2,238	2,168
Unrealized Losses - Total	55	90
Unrealized Loss Position
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities (securities)	168	247
Fair Value - Less Than 12 Months	17,144	462,913
Unrealized Losses - Less Than 12 Months	149	19,904
Fair Value - 12 Months or Longer	431,893	103,499
Unrealized Losses - 12 Months or Longer	38,711	32,910
Fair Value - Total	449,037	566,412
Unrealized Losses - Total	$ 38,860	$ 52,814