Guarantees, Commitments and Contingencies - Summary of Commitment and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Standby Letters of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Commitments and contingent liabilities	$ 180	$ 180
Standby Performance Letters of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Commitments and contingent liabilities	580	647
Commitments to Extend Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Commitments and contingent liabilities	$ 118,699	$ 96,967