Subordinated Debt - Schedule of Future Principal Repayments (Detail) $ in Thousands	Dec. 31, 2024 USD ($)
Subordinated Borrowing [Line Items]
Due in one year or less	$ 215,319
Thereafter	97,477
Total	312,796
Retail Repurchase Agreements [Member]
Subordinated Borrowing [Line Items]
Due in one year or less	37,246
Total	37,246
Federal Home Loan Bank Advances [Member]
Subordinated Borrowing [Line Items]
Due in one year or less	178,073
Total	178,073
Subordinated Debentures [Member]
Subordinated Borrowing [Line Items]
Thereafter	23,946
Total	23,946
Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Thereafter	73,531
Total	$ 73,531