Maximum Exposure to Loss Relating to Non-Consolidated VIEs (Detail) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Variable Interest Entity [Line Items]
VIE Assets	$ 49,892,220	$ 47,708,975
VIE Liabilities	27,458,992	25,827,803
Due from Affiliates
Variable Interest Entity [Line Items]
VIE Assets	220,883	344,342
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	6,828,368	5,505,419
Variable Interest Entity, Not Primary Beneficiary \| Potential Clawback Obligation
Variable Interest Entity [Line Items]
VIE Liabilities	42,255	42,291
Variable Interest Entity, Not Primary Beneficiary \| Amounts Due to Non-Consolidated VIEs
Variable Interest Entity [Line Items]
VIE Liabilities	838	623
Variable Interest Entity, Not Primary Beneficiary \| Investments
Variable Interest Entity [Line Items]
VIE Assets	$ 6,565,230	$ 5,118,786

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.

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+ Details