Investment Securities - Amortized Cost and Fair Value by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Amortized Cost
Due in one year or less	$ 6,218
Due after one year through five years	21,060
Due after five years through ten years	46,565
Due after ten years	21,781
Total	95,624
Mortgage-backed securities	92,559
Total available-for-sale securities	188,183	$ 175,123
Fair Value
Due in one year or less	6,252
Due after one year through five years	21,312
Due after five years through ten years	47,482
Due after ten years	22,103
Total	97,149
Mortgage-backed securities	94,887
Total available-for-sale securities	$ 192,036	$ 175,093