Non-covered Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Other Real Estate, Non Covered [Roll Forward]
Balance, beginning of year	$ 1,830	$ 4,845	$ 1,976	$ 4,122
Additions to OREO	3,228	707	3,742	1,719
Dispositions of OREO, net	(303)	(2,828)	(755)	(3,117)
Valuation adjustments	(341)	(53)	(549)	(53)
Balance, end of period	$ 4,414	$ 2,671	$ 4,414	$ 2,671