Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (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
Balance at beginning of period	$ 36,837	$ 83,115	$ 39,846	$ 96,354
Cash received from the FDIC	(3,442)	(3,268)	(1,765)	(6,387)
FDIC reimbursable losses, net	(364)	664	(231)	1,027
Amortization, net	(5,764)	(9,801)	(12,216)	(19,580)
Impairment	1,214	(1,370)	3,151	(585)
Sale of other real estate	(965)	(2,251)	(1,721)	(3,597)
Write-downs of other real estate	276	102	792	154
Other	189	183	125	(12)
Balance at end of period	$ 27,981	$ 67,374	$ 27,981	$ 67,374