Loans and Allowance for Loan Losses - Summary of Performance Status of Loan (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 1,855,510	$ 1,488,924
Percentage of Nonperforming to Total	1.68%	2.42%
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 1,824,361	$ 1,452,859
Non - Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	31,149	36,065
Recreation [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 1,171,819	$ 961,320
Percentage of Nonperforming to Total	0.62%	0.58%
Recreation [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 1,164,526	$ 955,763
Recreation [Member] | Non - Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	7,293	5,557
Home Improvement [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 575,210	$ 436,772
Percentage of Nonperforming to Total	0.08%	0.03%
Home Improvement [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 574,722	$ 436,640
Home Improvement [Member] | Non - Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	488	132
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 93,735	$ 76,696
Percentage of Nonperforming to Total	10.02%	21.29%
Commercial [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 84,340	$ 60,366
Commercial [Member] | Non - Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	9,395	16,330
Medallion [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 13,973	$ 14,046
Percentage of Nonperforming to Total	100.00%	100.00%
Medallion [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 0	$ 0
Medallion [Member] | Non - Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	13,973	14,046
Strategic Partnership [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 773	$ 90
Percentage of Nonperforming to Total	0.00%	0.00%
Strategic Partnership [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 773	$ 90
Strategic Partnership [Member] | Non - Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Status of loans	$ 0	$ 0