OREO (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Balance at beginning of year	$ 30,287	$ 16,849	$ 6,230
Additions to the valuation allowance	1,261	14,998	12,547
Reductions due to sales of OREO	(20,906)	(1,560)	(1,928)
Balance at end of year	$ 10,642	$ 30,287	$ 16,849