Loans and Allowance for Loan Losses - Summary of Allowance for Loan Losses by Type (Detail) - USD ($) $ in Thousands	Jun. 30, 2022		Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	[1],[2]	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Amount	$ 59,152	[1],[2]	$ 50,686	$ 50,166	$ 46,946		$ 57,809	$ 57,548
Percentage of Allowance	100.00%			100.00%
Allowance as a Percent of Loan Category	3.41%			3.37%
Allowance as a Percent of Nonaccrual	177.71%			141.03%
Recreation [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Amount	$ 37,772			$ 32,435
Percentage of Allowance	64.00%			64.00%
Allowance as a Percent of Loan Category	3.44%			3.37%
Allowance as a Percent of Nonaccrual	113.48%			91.18%
Home Improvement [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Amount	$ 9,234			$ 7,356
Percentage of Allowance	16.00%			15.00%
Allowance as a Percent of Loan Category	1.75%			1.68%
Allowance as a Percent of Nonaccrual	27.74%			20.68%
Commercial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Amount	$ 2,720			$ 1,141
Percentage of Allowance	4.00%			2.00%
Allowance as a Percent of Loan Category	2.81%			1.49%
Allowance as a Percent of Nonaccrual	8.17%			3.21%
Medallion [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Amount	$ 9,426			$ 9,234
Percentage of Allowance	16.00%			19.00%
Allowance as a Percent of Loan Category	66.61%			65.74%
Allowance as a Percent of Nonaccrual	28.32%			25.96%

[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.