Fair Values of Assets and Liabilities - Schedule of Assets Measured on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 869,373	$ 1,114,587
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	34,776	54,785
Fair Value Measurement Of Assets On Nonrecurring Basis Net Losses On Impaired Loans	(2,127)	352
Other Real Estate Owned Assets Fair Value	553	729
Fair Value Measurement Of Assets On Nonrecurring Basis Net Losses On Other Real Estate Owned	0	0
Total Assets	35,329	55,514
Fair Value Measurement Of Assets On Nonrecurring Basis Net Loss	(2,127)	352
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	0	0
Level 1 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other Real Estate Owned Assets Fair Value	0	0
Total Assets	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	850,512	1,098,436
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	23,140	42,538
Other Real Estate Owned Assets Fair Value	553	729
Total Assets	23,693	43,267
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	18,861	16,151
Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	11,636	12,247
Other Real Estate Owned Assets Fair Value	0	0
Total Assets	$ 11,636	$ 12,247