Covered Assets and FDIC Loss-sharing Asset (Covered OREO at Carrying Value) (Details) (Covered OREO [Member], USD $) In Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Covered OREO [Member]
Balance, beginning of period	$ 13,527	$ 14,443
Established through acquisitions	10,896	10,896
Transfers in, net of write-downs ($23 and $441, respectively)	1,668	5,092
OREO improvements	0	0
Additional OREO write-downs	99	113
Proceeds from sale of OREO property	(4,122)	(11,081)
Gain on sale of covered oreo	2,369	5,002
Balance, end of period	$ 24,239	$ 24,239