Loans and Allowance for Loan Losses - Summary of Nonperforming Loan Portfolio (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	$ 32,550	$ 36,065
Unpaid principal balance, With related allowance	33,754	37,007
Related Allowance, With related allowance	10,806	10,168
Average Investment Recorded, With related allowance	39,007	40,080
Interest Income (Expense) Recognized, With related allowance	405	608
Recreation [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	9,666	5,557
Unpaid principal balance, With related allowance	9,666	5,557
Related Allowance, With related allowance	343	188
Average Investment Recorded, With related allowance	9,093	5,618
Interest Income (Expense) Recognized, With related allowance	401	515
Home Improvement [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	579	132
Unpaid principal balance, With related allowance	579	132
Related Allowance, With related allowance	10	2
Average Investment Recorded, With related allowance	514	108
Interest Income (Expense) Recognized, With related allowance	4	0
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	8,734	16,330
Unpaid principal balance, With related allowance	8,823	16,360
Related Allowance, With related allowance	963	1,141
Average Investment Recorded, With related allowance	13,381	16,816
Interest Income (Expense) Recognized, With related allowance	0	93
Medallion [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	13,571	14,046
Unpaid principal balance, With related allowance	14,686	14,958
Related Allowance, With related allowance	9,490	8,837
Average Investment Recorded, With related allowance	16,019	17,538
Interest Income (Expense) Recognized, With related allowance	$ 0	$ 0