Securities Fair Value Option Securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule of Fair Value Option Securities [Line Items]
Fair Value Option Securities, Fair Value	$ 167,125	$ 284,296
Fair Value Option Securities, Unrealized Gain or Loss	(8,169)	4,770
U.S. agency residential mortgage-backed securities [Member]
Schedule of Fair Value Option Securities [Line Items]
Fair Value Option Securities, Fair Value	157,431	257,040
Fair Value Option Securities, Unrealized Gain or Loss	(8,378)	3,314
Corporate debt securities [Member]
Schedule of Fair Value Option Securities [Line Items]
Fair Value Option Securities, Fair Value	0	26,486
Fair Value Option Securities, Unrealized Gain or Loss	0	1,409
Other debt securities [Member]
Schedule of Fair Value Option Securities [Line Items]
Fair Value Option Securities, Fair Value	9,694	770
Fair Value Option Securities, Unrealized Gain or Loss	$ 209	$ 47