Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Thousands			6 Months Ended
	Jun. 15, 2022	Mar. 15, 2022	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Reserve for lending-related commitments			$ 42,579	$ 31,442
Maximum Period Related To Accrual Of Interest On Discontinued Loans			90 days
Allowance for credit loss on accrued interest receivable			$ 0	8
Accrued interest receivable net of allowance for credit loss			71,035	64,512
Percentage of projection for real GDP	1.70%	2.80%
Accrued Income Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit loss on accrued interest receivable			0	8
Accrued interest receivable net of allowance for credit loss			$ 50,847	$ 49,029