Variable interest entities - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Variable Interest Entity [Line Items]
Assets	$ 17,499,365	$ 17,480,103
Liabilities	16,451,199	$ 16,321,665
Variable Interest Entity
Variable Interest Entity [Line Items]
Assets	602,328
Liabilities	$ 228,092

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

Amount of liability recognized for present obligation requiring transfer or otherwise providing economic benefit to others.

+ References

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+ Details

- Definition

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.

+ References + Details