Loans and Allowance for Loan Losses - Additional Information (Detail) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022 USD ($) TDR		Jun. 30, 2021 USD ($) TDR		Jun. 30, 2022 USD ($) TDR		Jun. 30, 2021 USD ($) TDR Medallion		Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Financing Receivable Recorded Investment Past Due [Line Items]
Weighted average loan-to-value ratio	320.00%				320.00%					295.00%
Allowance for loan loss	$ 59,152	[1],[2]	$ 46,946	[1],[2]	$ 59,152	[1],[2]	$ 46,946	[1],[2]	$ 50,686	$ 50,166	$ 57,809	$ 57,548
Medallion [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of loans modified as TDRs defaulted | TDR	0		2		2		10
Allowance for loan loss	$ 9,426				$ 9,426					9,234
Recreation [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of loans modified as TDRs defaulted | TDR	12		21		22		39
Allowance for loan loss	$ 37,772				$ 37,772					$ 32,435
Troubled Debt Restructuring Defaulted [Member] | Medallion [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of loans modified as TDRs defaulted | Medallion							43
Troubled Debt Restructuring Defaulted [Member] | Recreation [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of loans modified as TDRs defaulted | TDR					20		37
TDR investment value	$ 200		$ 400		$ 200		$ 400

[1] As of June 30, 2022 and June 30, 2021, there were no allowance for loan losses and net charge-offs related to the strategic partnership loans.

[2] As of June 30, 2022, cumulative net charge-offs of loans and loan collateral in process of foreclosure in the medallion loan portfolio were $252.1 million, some of which may represent collection opportunities for the Company.