Goodwill and Other Intangible Assets - Summary of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 7,435	$ 7,400	$ 7,400
Gross carrying amount	2,048
Accumulated amortization	(1,073)
Core deposit intangible, net	975
Total	$ 8,410	$ 8,825