Borrowings, Line of Credit and Subordinated Debt - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		15 Months Ended
	Sep. 01, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2021	Sep. 28, 2018
Debt Instrument [Line Items]
Borrowings		$ 36,700		$ 36,700	$ 87,600
Other borrowings		7,500		7,500	7,500
Securities sold under agreements to repurchase		4,213		4,213	5,085
Carrying value of securities pledged as collateral		9,800		9,800	10,100
Repayment borrowings		50,000	$ 4
Securities sold under agreements to repurchase, average balance		5,000	6,400	5,000
Securities sold under agreements to repurchase, maximum month-end balance		5,500	$ 7,200	5,500
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		25,000		25,000
Outstanding borrowings		7,500		7,500
Remaining borrowing capacity		17,500		17,500
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Repayment borrowings		50,000
Subordinated Debt [Member]
Debt Instrument [Line Items]
Principal amount						$ 40,000
Interest rate						5.625%
Debt issuance costs		$ 548		548	$ 570
Amortization expense of debt issuance costs				$ 21
Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.55%
Subordinated Debt [Member] | Sevier County Bancshares Inc [Member]
Debt Instrument [Line Items]
Interest rate	6.75%
Subordinated Debt [Member] | Sevier County Bancshares Inc [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	5.3025%