Loans and Allowance for Loan Losses - Additional Information (Detail) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2022 USD ($) TDR		Sep. 30, 2021 USD ($) TDR		Sep. 30, 2022 USD ($) TDR		Sep. 30, 2021 USD ($) TDR Medallion		Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Financing Receivable Recorded Investment Past Due [Line Items]
Weighted average loan-to-value ratio	330.00%				330.00%					295.00%
Allowance for loan loss	$ 61,535	[1]	$ 47,448	[1]	$ 61,535	[1]	$ 47,448	[1]	$ 59,152	$ 50,166	$ 46,946	$ 57,548
Medallion [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of loans modified as TDRs defaulted | TDR	0		1		2		11
Allowance for loan loss	$ 9,596				$ 9,596					9,234
Recreation [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of loans modified as TDRs defaulted | TDR	34		8		56		47
Allowance for loan loss	$ 40,768				$ 40,768					$ 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							37
TDR investment value			$ 500				$ 500
Troubled Debt Restructuring Defaulted [Member] | Recreation [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of loans modified as TDRs defaulted | TDR					37		37
TDR investment value	$ 500		$ 400		$ 500		$ 400

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