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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Contractual amount of off-balance-sheet financial instruments    
Total contractual amount of off-balance-sheet financial instruments $ 258,746 $ 165,947
Commitments to extend credit    
Contractual amount of off-balance-sheet financial instruments    
Total contractual amount of off-balance-sheet financial instruments 253,375 161,306
Commitments to originate residential first and second mortgage loans    
Contractual amount of off-balance-sheet financial instruments    
Total contractual amount of off-balance-sheet financial instruments 2,626 3,175
Standby letters of credit    
Contractual amount of off-balance-sheet financial instruments    
Total contractual amount of off-balance-sheet financial instruments $ 2,745 $ 1,466