Allowance for Credit Losses - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Increase in allowance for credit losses	$ 4,300,000
Allowance for credit losses	38,849,000		$ 36,170,000		$ 28,511,000
Provision for credit losses	$ 2,042,000	$ 620,000
Number of days reaching where loans are considered for nonaccrual status	90 days
Conditions where loans are considered for nonaccrual status	A loan may be returned to accruing status only if one of two conditions are met: the loan is well-secured and none of the principal and interest has been past due for a minimum of 90 days or the principal and interest payments are reasonably assured and a sustained period of performance has occurred, generally six months.
Loans modified as troubled debt restructuring	$ 0
Individually evaluated loans	greater than $350
Foreclosed assets	$ 0		$ 0
ASU 2016-13 [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses				$ 37,861,000
Adjustment [Member] | ASU 2016-13 [Member]
Accounts Notes And Loans Receivable [Line Items]
Increase allowance of credit loss		$ 5,193,000