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Variable Interest Entities - Schedule of Aggregate Assets, Liabilities, and Our Exposure to Loss from those VIEs (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]    
Assets $ 38,597,653 $ 37,196,124
Total liabilities 33,270,261 31,867,653
Variable Interest Entity, Not Primary Beneficiary [Member] | Debt and equity [member]    
Variable Interest Entity [Line Items]    
Assets 804,931 791,111
Total liabilities 291,225 297,555
Gain (Loss) on Price Risk Derivatives, Net 24,943 14,776
Variable Interest Entity, Not Primary Beneficiary [Member] | Miscellaneous Investments [Member]    
Variable Interest Entity [Line Items]    
Assets 409,254 388,408
Total liabilities 288,661 296,375
Gain (Loss) on Price Risk Derivatives, Net 24,943 14,776
Variable Interest Entity, Not Primary Beneficiary [Member] | Partnership Interest [Member]    
Variable Interest Entity [Line Items]    
Assets 395,677 402,703
Total liabilities 2,564 1,180
Gain (Loss) on Price Risk Derivatives, Net $ 0 $ 0