Income Taxes - Income Tax Provision Attributable to Income from Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Expected provision using statutory federal income tax rate	$ 3,473	$ 2,815
Effect of bond and loan tax-exempt income	(113)	(121)
Bank owned life insurance income	(141)	(130)
Other	4	3
Total income tax provision	$ 3,223	$ 2,567