Securities - Available-for-sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Amortized Cost
Securities Available for Sale, Due in one year or less, Amortized Cost	$ 4,623
Securities Available for Sale, Due from one year to five years, Amortized Cost	5,009
Securities Available for Sale, Due from five years to ten years, Amortized Cost	26,195
Securities Available for Sale, Due after ten years, Amortized Cost	100,867
Securities Available for Sale, Amortized Cost	136,694
Amortized Cost	211,118	$ 177,819
Fair Value
Securities Available for Sale, Due in one year or less, Fair Value	4,679
Securities Available for Sale, Due from one year to five years, Fair Value	5,025
Securities Available for Sale, Due from five years to ten years, Fair Value	26,386
Securities Available for Sale, Due after ten years, Fair Value	102,431
Securities Available for Sale, Fair Value	138,521
Securities available for sale	214,634	$ 178,348
Mortgage-backed securities [Member]
Amortized Cost
Mortgage-backed securities, Amortized Cost	74,424
Fair Value
Mortgage-backed securities, Fair Value	$ 76,113