Subordinated Debt - Schedule of Future Principal Repayments (Detail) $ in Thousands	Dec. 31, 2021 USD ($)
Subordinated Borrowing [Line Items]
Due in one year or less	$ 56,006
Thereafter	103,352
Total	159,358
Retail Repurchase Agreements [Member]
Subordinated Borrowing [Line Items]
Due in one year or less	56,006
Total	56,006
Subordinated Debentures [Member]
Subordinated Borrowing [Line Items]
Thereafter	28,352
Total	28,352
Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Thereafter	75,000
Total	$ 75,000