Loans and Allowance for Loan Losses - Summary of Non Accrual Loan (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Receivables [Abstract]
Total nonaccrual loans	$ 30,780	$ 35,571
Interest foregone quarter to date	504	466
Amount of foregone interest applied to principal in the quarter	101	114
Interest foregone year to date	1,670	1,620
Amount of foregone interest applied to principal year to date	301	432
Interest foregone life to date	3,251	3,623
Amount of foregone interest applied to principal life-to-date	$ 1,178	$ 942
Percentage of nonaccrual loans to gross loan portfolio	1.70%	2.40%
Percentage of allowance for loan losses to nonaccrual loans	199.90%	141.00%