Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 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	(1,811)	(1,131)
Balance, end of period	(9,914)	(8,042)
Contingent Consideration Liability
Level 3 Liabilities Measured on a Recurring Basis
Balance, beginning of period	0
Total realized/unrealized gains (losses):
Additions	(45,768)
Other (1)	(515)
Balance, end of period	$ (46,283)