Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale, by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized Cost [Abstract]
Due in one year or less	$ 2,054
Due after one year through five years	7,934
Due after five years through ten years	8,972
Due after ten years	60,542
Amortized cost	79,502	$ 78,144
Fair Value [Abstract]
Due in one year or less	2,072
Due after one year through five years	8,419
Due after five years through ten years	9,467
Due after ten years	62,890
Total fair value	$ 82,848	$ 79,783