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OREO (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]    
Mortgage Loans in Process of Foreclosure, Amount $ 0  
Real Estate Acquired Through Foreclosure [Roll Forward]    
Beginning balance 10,019 $ 6,254
Additions 368 3,227
Valuation adjustments (47) (17)
Dispositions (912) (207)
Ending balance 9,428 $ 9,257
Residential real estate    
Real Estate Acquired Through Foreclosure [Roll Forward]    
Beginning balance 2,282  
Ending balance $ 2,538