Fair Value - Assets Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Specific allowance for loan losses	$ (1,900)	$ (6,293)
Level 3 | Nonrecurring | Remeasured Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of impaired loans before allowance for loan losses	4,114	6,776
Specific allowance for loan losses	(79)	(856)
Fair value of impaired loans	4,035	5,920
Foreclosed assets remeasured at initial recognition:
Carrying value of foreclosed assets prior to remeasurement	266	85
Charge-offs	0	0
Fair value of foreclosed assets	266	85
Level 3 | Nonrecurring | Remeasured Loans, Subsequent To Initial Recognition
Foreclosed assets remeasured at initial recognition:
Carrying value of foreclosed assets prior to remeasurement	133	150
Write-downs	(34)	(17)
Fair value of foreclosed assets	$ 99	$ 133