Covered Assets and FDIC Loss-sharing Asset (Changes in Allowance for Covered Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Provision for loan and lease losses			$ 4,039	$ 268
Covered Loans [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Beginning balance	20,129	29,489	20,174	30,056
Loans charged off	(3,842)	(2,642)	(8,115)	(5,024)
Recoveries	1,997	1,000	3,803	1,835
Provision for loan and lease losses	1,517	(1,712)	3,939	(732)
Ending balance	$ 19,801	$ 26,135	$ 19,801	$ 26,135