Variable interest entities - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Assets	$ 17,492,958	$ 17,285,268
Liabilities	15,939,935	$ 15,193,917
Variable Interest Entity
Assets	593,868
Liabilities	$ 247,330

Amount of asset recognized for present right to economic benefit.

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

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