Fair Value Measurements (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Total realized/unrealized gains (losses):
Paydowns received on Level 3 assets measured on a recurring basis	$ 47,200,000	$ 4,000,000
Securities Available-for-Sale
Level 3 Assets Measured on a Recurring Basis
Balance, beginning of period	65,187,000	19,583,000
Total realized/unrealized gains (losses):
Included in earnings	(5,302,000)
Included in other comprehensive income	5,916,000	2,332,000
Sales	(15,096,000)
Settlements	(47,180,000)	(4,004,000)
Transfers into level 3		47,165,000
Other (1)	108,000	111,000
Balance, end of period	$ 3,633,000	$ 65,187,000