v3.26.1
Variable Interest Entities (Schedule of Aggregate Assets, Liabilities, and Our Exposure to Loss from those VIEs) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Variable Interest Entity [Line Items]    
Assets $ 44,907,609 $ 41,270,782
Total liabilities 38,894,368 35,293,465
Variable Interest Entity Not Primary Beneficiary [Member] | Debt and equity [member]    
Variable Interest Entity [Line Items]    
Assets 888,593 872,292
Total liabilities 277,479 265,722
Maximum Exposure to Loss 50,024 46,940
Variable Interest Entity Not Primary Beneficiary [Member] | Miscellaneous Investments [Member]    
Variable Interest Entity [Line Items]    
Assets 520,357 501,229
Total liabilities 276,452 264,951
Maximum Exposure to Loss 50,024 46,940
Variable Interest Entity Not Primary Beneficiary [Member] | Partnership Interest [Member]    
Variable Interest Entity [Line Items]    
Assets 368,236 371,063
Total liabilities 1,027 771
Maximum Exposure to Loss $ 0 $ 0