Business and Basis of Presentation Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Background And Basis Of Presentation [Line Items]
Foreign Exchange	$ 3,797
Stockholders' Equity Attributable to Noncontrolling Interest	173,827	$ 197,755
Reclassification from nonredeemable noncontrolling interest including remeasurement at fair value	42,180
Reclassification to nonredeemable noncontrolling interest	(1,877)
Insurance Distribution
Background And Basis Of Presentation [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest	$ 122,909	$ 146,837
Ambac Assurance Corporation [Member]
Background And Basis Of Presentation [Line Items]
Preferred Stock, Shares Outstanding	4,596	4,596
Preferred Stock, Liquidation Preference, Value	$ 114,900	$ 114,900
Stockholders' Equity Attributable to Noncontrolling Interest	$ 50,918