Borrowings - Schedule of Subordinated Notes (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2024	Dec. 31, 2023	Jul. 23, 2020	Jun. 29, 2020
Debt Instrument Redemption [Line Items]
Debt instrument term	5 years
Subordinated Notes [Member]
Debt Instrument Redemption [Line Items]
Subordinated notes	$ 75,000	$ 75,000	$ 33,000	$ 42,000
Total principal outstanding	75,000	75,000
Debt issuance cost	(1,521)	(1,673)
Total subordinated debentures	$ 73,479	$ 73,327
Weighted Average Rate	7.00%	7.00%
Debt instrument term	5 years 9 months 18 days	6 years 6 months

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average interest rate of debt outstanding.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Carrying value as of the balance sheet date of collateralized/uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Subordinated debt places a lender in a lien position behind the primary lender of the company.

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