Securities - Schedule of Amortized Cost and Fair Value by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Available for Sale Amortized Cost
1 year or less	$ 54,160
Over 1 year through 5 years	34,050
Over 5 years through 10 years	111,373
Over 10 years	44,124
Available for Sale, Amortized Cost	356,852	$ 331,745
Available for Sale Fair Value
1 year or less	54,583
Over 1 year through 5 years	34,902
Over 5 years through 10 years	108,131
Over 10 years	43,091
Available for Sale, Fair Value	355,008	337,718	$ 253,048
Held-to-Maturity Amortized Cost
1 year or less	0
Over 1 year through 5 years	0
Over 5 years through 10 years	0
Over 10 years	0
Held to Maturity, Amortized Cost	9,155	10,294	18,090
Held-to-Maturity Fair Value
1 year or less	0
Over 1 year through 5 years	0
Over 5 years through 10 years	0
Over 10 years	0
Held to Maturity, Fair Value	9,451	10,768	$ 18,565
Mortgage-backed securities, residential
Available for Sale Amortized Cost
Without single maturity date	113,145
Available for Sale, Amortized Cost	113,145	105,327
Available for Sale Fair Value
Without single maturity date	114,301
Available for Sale, Fair Value	114,301	108,822
Held-to-Maturity Amortized Cost
Without single maturity date	9,155
Held to Maturity, Amortized Cost	9,155	10,294
Held-to-Maturity Fair Value
Without single maturity date	9,451
Held to Maturity, Fair Value	$ 9,451	$ 10,768