Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Contingent Consideration Liability
Level 3 Liabilities Measured on a Recurring Basis
Balance, beginning of period	$ (47,724)
Total realized/unrealized gains (losses):
Other (1)	(1,076)
Balance, end of period	(48,800)
FDIC Clawback Liability
Level 3 Liabilities Measured on a Recurring Basis
Balance, beginning of period	(9,970)	(8,103)
Total realized/unrealized gains (losses):
Included in earnings	(1,083)	(1,114)
Balance, end of period	$ (11,053)	$ (9,217)