Loans and Allowance for Loan 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, 2022		Jun. 30, 2021	Jun. 30, 2022		Jun. 30, 2021
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	$ 33,834		$ 50,733	$ 37,430	[1]	$ 54,560
Transfer from loans, net	2,757		6,913	5,797		10,663
Sales	(4,145)		(2,220)	6,513		(4,519)
Cash payments received	(4,381)		(3,146)	7,253		(4,423)
Collateral valuation adjustments	(1,091)		(3,241)	2,487		(7,242)
Loans collateral in process of foreclosure - ending balance	26,974	[1]	49,039	26,974	[1]	49,039
Recreation [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	1,369		970	1,720		1,432
Transfer from loans, net	2,618		2,980	5,529		6,033
Sales	(2,146)		(1,989)	4,398		(4,288)
Cash payments received	0		0	0		0
Collateral valuation adjustments	(963)		(1,079)	1,973		(2,295)
Loans collateral in process of foreclosure - ending balance	878		882	878		882
Medallion [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	32,465		49,763	35,710		53,128
Transfer from loans, net	139		3,933	268		4,630
Sales	(1,999)		(231)	2,115		(231)
Cash payments received	(4,381)		(3,146)	7,253		(4,423)
Collateral valuation adjustments	(128)		(2,162)	514		(4,947)
Loans collateral in process of foreclosure - ending balance	$ 26,096		$ 48,157	$ 26,096		$ 48,157

[1] Includes financed sales of this collateral to third parties that are reported separately from the loan portfolio, of $7.7 million as of June 30, 2022 and $7.4 million as of December 31, 2021