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Maximum Exposure to Loss Relating to Non-Consolidated VIEs (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Variable Interest Entity [Line Items]    
VIE Assets $ 42,524,227 $ 41,196,408
VIE Liabilities 22,843,160 19,490,362
Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum Exposure to Loss 3,900,835 3,562,023
Variable Interest Entity, Not Primary Beneficiary | Investments    
Variable Interest Entity [Line Items]    
VIE Assets 3,326,669 3,337,757
Variable Interest Entity, Not Primary Beneficiary | Due from Affiliates    
Variable Interest Entity [Line Items]    
VIE Assets 189,240 179,939
Variable Interest Entity, Not Primary Beneficiary | Potential Clawback Obligation    
Variable Interest Entity [Line Items]    
VIE Liabilities 384,926 44,327
Variable Interest Entity, Not Primary Beneficiary | Amounts Due to Non-Consolidated VIEs    
Variable Interest Entity [Line Items]    
VIE Liabilities $ 6 $ 105