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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Contractual amount of off-balance-sheet financial instruments    
Total contractual amount of off-balance-sheet financial instruments $ 281,709 $ 258,746
Commitments to extend credit    
Contractual amount of off-balance-sheet financial instruments    
Total contractual amount of off-balance-sheet financial instruments 220,119 253,375
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 4,572 2,626
Standby letters of credit    
Contractual amount of off-balance-sheet financial instruments    
Total contractual amount of off-balance-sheet financial instruments $ 57,018 $ 2,745