Securities - Schedule of Amortized Cost and Fair Value by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Available for Sale Amortized Cost
1 year or less	$ 81,650
Over 1 year through 5 years	50,455
Over 5 years through 10 years	47,327
Over 10 years	29,739
Available for Sale, Amortized Cost	307,404	$ 189,208
Available for Sale Fair Value
1 year or less	82,188
Over 1 year through 5 years	52,078
Over 5 years through 10 years	47,592
Over 10 years	29,958
Available for Sale, Fair Value	313,671	190,837	$ 184,678
Held-to-Maturity Amortized Cost
1 year or less	2,000
Over 1 year through 5 years	0
Over 5 years through 10 years	0
Over 10 years	0
Held to Maturity, Amortized Cost	13,606	19,234	22,443
Held-to-Maturity Fair Value
1 year or less	2,005
Over 1 year through 5 years	0
Over 5 years through 10 years	0
Over 10 years	0
Held to Maturity, Fair Value	14,110	19,281	$ 22,518
Mortgage-backed securities, residential
Available for Sale Amortized Cost
Without single maturity date	98,233
Available for Sale, Amortized Cost	98,233	64,699
Available for Sale Fair Value
Without single maturity date	101,855
Available for Sale, Fair Value	101,855	65,592
Held-to-Maturity Amortized Cost
Without single maturity date	11,606
Held to Maturity, Amortized Cost	11,606	15,234
Held-to-Maturity Fair Value
Without single maturity date	12,105
Held to Maturity, Fair Value	$ 12,105	$ 15,273