Covered Assets and FDIC Loss-sharing Asset (Changes in Allowance for Covered Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Provision for loan and lease losses			$ 5,019	$ 3,581
Covered Loans [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Beginning balance	19,801	26,135	20,174	30,056
Loans charged off	(3,236)	(5,006)	(11,350)	(10,031)
Recoveries	1,888	2,555	5,690	4,391
Provision for loan and lease losses	(520)	(947)	3,419	(1,679)
Ending balance	$ 17,933	$ 22,737	$ 17,933	$ 22,737