Loans and Allowance for Credit Losses - Summary of Activities of the Loan Collateral in Process of Foreclosure Related to Recreation and Medallion Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024		Mar. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	$ 11,772	[1]	$ 21,819
Transfer from loans, net	5,425		6,504
Sales	(39)		(2,210)
Cash payments received	(3,720)		(3,317)
Collateral valuation adjustments	(3,240)		(2,329)
Loans collateral in process of foreclosure - ending balance	10,198	[1]	20,467
Recreation [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	1,779		1,376
Transfer from loans, net	5,425		4,357
Sales	0		(2,195)
Cash payments received	(2,447)		0
Collateral valuation adjustments	(3,282)		(2,077)
Loans collateral in process of foreclosure - ending balance	1,475		1,461
Taxi Medallion [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	9,993		20,443
Transfer from loans, net	0		2,147
Sales	(39)		(15)
Cash payments received	(1,273)		(3,317)
Collateral valuation adjustments	42		(252)
Loans collateral in process of foreclosure - ending balance	$ 8,723		$ 19,006

[1] Includes financed sales of this collateral to third parties that are reported separately from the loan portfolio, of $5.8 million as of March 31, 2024 and $6.2 million as of December 31, 2023.