Securities - Summary of Scheduled Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 3,350
Due after one year through five years	26,768
Due after five through ten years	18,825
Due after ten years	3,494
Amortized Cost	98,598	$ 100,446
Fair Value
Due in one year or less	3,336
Due after one year through five years	26,231
Due after five through ten years	18,454
Due after ten years	3,396
Fair Value	96,216	99,350
U.S. agency mortgage-backed securities: residential
Amortized Cost
Amortized Cost	23,957	20,904
Fair Value
Fair Value	23,466	20,758
U.S. agency collateralized mortgage obligations: residential
Amortized Cost
Amortized Cost	22,204	22,607
Fair Value
Fair Value	$ 21,333	$ 21,924