Significant Accounting Policies - Additional Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Accounting Policies [Abstract]
Interest	$ 144,787	$ 174,073
Income Tax Paid, Federal, after Refund Received	0	0
Income Tax Paid, State and Local, after Refund Received	0	0
Unsettled securities transactions	145,750	10,456
Loans foreclosed and transferred to other real estate owned and foreclosed assets	0	0
Right-of-use lease assets obtained in exchange for lessee operating lease liabilities	$ 3,618	$ 9,150

No definition available.

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- Definition

Amount, after income tax refund received, of cash paid to federal (national) tax jurisdiction for tax on income.

+ References

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Amount, after income tax refund received, of cash paid to state and local tax jurisdictions for tax on income.

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of obligations incurred arising from transactions with broker-dealers, such as amounts due on margin and unsettled cash transactions; includes payables to brokers, dealers and clearing organizations.

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Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Value transferred from mortgage loans to real estate owned (REO) in noncash transactions.

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