Securities - Summary of Scheduled Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 3,120
Due after one year through five years	34,277
Due after five through ten years	18,018
Due after ten years	2,747
Amortized Cost	102,566	$ 100,446
Fair Value
Due in one year or less	3,108
Due after one year through five years	33,640
Due after five through ten years	17,672
Due after ten years	2,668
Fair Value	99,886	99,350
U.S. agency mortgage-backed securities: residential
Amortized Cost
Amortized Cost	23,236	20,904
Fair Value
Fair Value	22,544	20,758
U.S. agency collateralized mortgage obligations: residential
Amortized Cost
Amortized Cost	21,168	22,607
Fair Value
Fair Value	$ 20,254	$ 21,924