Commitments and Contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Contractual amount of off-balance-sheet financial instruments
Total contractual amount of off-balance-sheet financial instruments	$ 265,746	$ 258,746
Commitments to extend credit
Contractual amount of off-balance-sheet financial instruments
Total contractual amount of off-balance-sheet financial instruments	238,425	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	3,751	2,626
Standby letters of credit
Contractual amount of off-balance-sheet financial instruments
Total contractual amount of off-balance-sheet financial instruments	$ 23,570	$ 2,745