OREO (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2012	Mar. 31, 2011
Real Estate Acquired Through Foreclosure [Roll Forward]
Beginning balance			$ 37,452	$ 33,632	$ 53,817	$ 28,323
Additions	3,816	3,385	36,933	9,148
Capitalized improvements	0	0	75	15
Valuation adjustments	(2,310)	(2,457)	(3,457)	(5,972)
Dispositions	(15,352)	(4,171)	(31,032)	(11,743)
Ending balance	$ 39,971	$ 25,080	$ 39,971	$ 25,080	$ 53,817	$ 28,323