Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
FDIC Clawback Liability
Level 3 Liabilities Measured on a Recurring Basis
Balance, beginning of period	$ (8,103)	$ (6,911)
Total realized/unrealized gains (losses):
Included in earnings	(1,867)	(1,192)
Balance, end of period	(9,970)	(8,103)
Contingent Consideration Liability
Level 3 Liabilities Measured on a Recurring Basis
Balance, beginning of period	0
Total realized/unrealized gains (losses):
Additions	(46,696)
Other (1)	(1,028)
Balance, end of period	$ (47,724)