Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale, by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Amortized Cost [Abstract]
Due in one year or less	$ 1,055
Due after one year through five years	16,204
Due after five years through ten years	10,396
Due after ten years	52,580
Amortized cost	80,235	$ 78,144
Fair Value [Abstract]
Due in one year or less	1,065
Due after one year through five years	17,221
Due after five years through ten years	11,032
Due after ten years	55,272
Total fair value	$ 84,590	$ 79,783