Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Transfer of assets into or out of level 3	$ 1	$ 0
Transfer of liabilities into or out of level 3	1	0
Collateral dependent impaired loans categorized as Level 3	8,857,000	11,939,000
Specific allocation for collateral dependent impaired loans	1,996,000	2,184,000
Collateral Dependent [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Specific allocation for collateral dependent impaired loans	1,996,000	2,184,000
Level 3 [Member] | Collateral Dependent [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Collateral dependent impaired loans categorized as Level 3	$ 2,667,000	$ 8,527,000