Covered Assets and FDIC Loss-sharing Asset (Covered OREO at Carrying Value) (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]
Balance, beginning of period			$ 35,927
Proceeds from sale of OREO property			(16,527)	(10,779)
Gain on sale of OREO			4,955	8,745
Total OREO, end of period	21,904		21,904
Covered Loans [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance, beginning of period	13,051	12,854	12,093	16,311
Transfers in	614	3,559	6,121	8,089
Additional OREO write-down	(37)	(199)	(1,025)	(293)
Proceeds from sale of OREO property	(2,526)	(5,408)	(8,161)	(19,222)
Gain on sale of OREO	487	1,924	2,561	7,845
Total OREO, end of period	$ 11,589	$ 12,730	$ 11,589	$ 12,730