Investments (Equity Method Investments, Statement of Financial Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Total assets	$ 238,454,729	$ 213,269,687
Total liabilities	233,752,749	208,766,823
Partners’ capital	4,596,441	4,472,670
Total liabilities and partners’ capital	238,454,729	213,269,687
LP/LLC Interests
Schedule of Equity Method Investments [Line Items]
Total liabilities and partners’ capital included above	1,338,056	979,271
Equity in LP/LLC interests not included above	230,687	216,205
Carrying value	1,568,743	1,195,476
Equity Method Investment
Schedule of Equity Method Investments [Line Items]
Total assets	66,477,439	44,591,082
Total liabilities	1,894,242	2,802,022
Partners’ capital	64,583,197	41,789,060
Total liabilities and partners’ capital	$ 66,477,439	$ 44,591,082