Covered Assets and FDIC Loss-sharing Asset (Covered OREO at Carrying Value) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance, beginning of period	$ 35,927
Proceeds from sale of OREO property	(8,102)	(2,019)
Gain on sale of OREO	1,659	2,787
Total OREO, end of period	30,552
Covered Loans [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance, beginning of period	12,093	16,311
Transfers in	5,507	1,405
Additional OREO write-down	(651)	(65)
Proceeds from sale of OREO property	(3,103)	(6,438)
Gain on sale of OREO	866	2,598
Total OREO, end of period	$ 14,712	$ 13,811