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OREO (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Real Estate Acquired Through Foreclosure [Roll Forward]      
Beginning balance $ 32,571   $ 37,452
Additions 5,331 13,978  
Capitalized improvements 10 (331)  
Valuation adjustments (2,305) (578)  
Dispositions (3,137) (5,765)  
Ending balance $ 32,470 $ 44,756 $ 37,452