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			6 Months Ended
	Jun. 30, 2024		Jun. 30, 2023	Jun. 30, 2024		Jun. 30, 2023
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	$ 10,198		$ 20,467	$ 11,772	[1]	$ 21,819
Transfer from loans, net	5,669		4,150	11,094		10,654
Sales	0		(3,136)	(39)		(5,346)
Cash payments received	(3,106)		(2,645)	(6,826)		(5,962)
Collateral valuation adjustments	(3,402)		(2,033)	(6,642)		(4,362)
Loans collateral in process of foreclosure - ending balance	9,359	[1]	16,803	9,359	[1]	16,803
Recreation [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	1,475		1,461	1,779		1,376
Transfer from loans, net	5,669		3,991	11,094		8,348
Sales	0		(2,583)	0		(4,778)
Cash payments received	(2,225)		(128)	(4,672)		(128)
Collateral valuation adjustments	(3,478)		(2,012)	(6,760)		(4,089)
Loans collateral in process of foreclosure - ending balance	1,441		729	1,441		729
Taxi Medallion [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	8,723		19,006	9,993		20,443
Transfer from loans, net	0		159	0		2,306
Sales	0		(553)	(39)		(568)
Cash payments received	(881)		(2,517)	(2,154)		(5,834)
Collateral valuation adjustments	76		(21)	118		(273)
Loans collateral in process of foreclosure - ending balance	$ 7,918		$ 16,074	$ 7,918		$ 16,074

[1] Includes financed sales of this collateral to third parties that are reported separately from the loan portfolio, of $5.3 million as of June 30, 2024 and $6.2 million as of December 31, 2023.