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
	Mar. 31, 2022		Mar. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	$ 37,430	[1],[2]	$ 54,560
Transfer from loans, net	3,040		3,802
Sales	(2,368)		(2,298)
Cash payments received	(2,872)		(1,329)
Collateral valuation adjustments	(1,396)		(4,002)
Loans collateral in process of foreclosure - ending balance	33,834	[1]	50,733
Recreation [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	1,720		1,432
Transfer from loans, net	2,911		3,053
Sales	(2,252)		(2,298)
Cash payments received	0		0
Collateral valuation adjustments	(1,010)		(1,217)
Loans collateral in process of foreclosure - ending balance	1,369		970
Medallion [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collateral in process of foreclosure - beginning balance	35,710		53,128
Transfer from loans, net	129		749
Sales	(116)		0
Cash payments received	(2,872)		(1,329)
Collateral valuation adjustments	(386)		(2,785)
Loans collateral in process of foreclosure - ending balance	$ 32,465		$ 49,763

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

[2] Represents amount net of liquidation costs.