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Foreclosed Real Estate (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Real Estate Properties [Line Items]    
Foreclosed real estate $ 1,699 $ 2,665
Residential real estate    
Real Estate Properties [Line Items]    
Foreclosed real estate 914 1,810
Commercial real estate    
Real Estate Properties [Line Items]    
Foreclosed real estate $ 785 $ 855