Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Amortized Cost
Due in one year or less	$ 1,250
Due after one year through five years	1,862
Due after five years through ten years	19,210
Due after ten years or more	23,335
Mortgage-backed, due in monthly installments	57,113
Amortized Cost	102,770	$ 105,269
Fair Value
Due in one year or less	1,253
Due after one year through five years	1,890
Due after five years through ten years	19,518
Due after ten years or more	23,672
Mortgage-backed securities, due in monthly installments	58,319
Fair Value	$ 104,652	$ 106,256