Variable Interest Entities (Assets and Liabilities of Consolidated VIEs) (Details) - USD ($) $ in Thousands		Jun. 30, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Other invested assets	[1]	$ 2,300,289	$ 1,582,094
Total assets of consolidated VIEs		247,209,104	238,454,729
Payables to parent and affiliates	[1]	2,533,766	3,653,848
Other liabilities	[1]	4,038,981	4,199,803
Total liabilities of consolidated VIEs		241,527,389	233,752,749
Consolidated VIEs for Which the Company is the Investment Manager
Variable Interest Entity [Line Items]
Other invested assets		74,198	0
Total assets of consolidated VIEs		74,198	0
Payables to parent and affiliates		90	0
Other liabilities		362	0
Total liabilities of consolidated VIEs		$ 452	$ 0

[1] See Note 4 for details of balances associated with variable interest entities.