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Business and Basis of Presentation Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Background And Basis Of Presentation [Line Items]
Foreign Exchange	$ 371	$ 13,730	$ (3,822)	$ 19,388
Stockholders' Equity Attributable to Noncontrolling Interest	119,092		119,092			$ 117,395
Reclassification from nonredeemable noncontrolling interest including remeasurement at fair value	1,328	0	1,328	42,180
Reclassification to nonredeemable noncontrolling interest	0	(3,259)	(3,841)	(5,136)
Put / call option exercise	0	(1,815)	(49,708)	(1,815)
Redeemable Noncontrolling Interest, Equity, Carrying Amount	197,529	252,685	197,529	252,685	$ 195,969	$ 252,981	$ 245,461	$ 199,402
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	85	(999)	2,065	(741)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(454)	(211)	(897)	(919)
Temporary Equity, Accretion to Redemption Value, Adjustment	$ 230	(222)	(577)	326
Payments for Repurchase of Redeemable Noncontrolling Interest			494
Adjustment of NCI to fair value			(507)	(10,276)
Payments to Noncontrolling Interests			$ (44,027)	(4,036)
Payments To Minority Shareholders_XX				1,068
Previously Reported
Background And Basis Of Presentation [Line Items]
Foreign Exchange		9,973		13,770
Reclassification from nonredeemable noncontrolling interest including remeasurement at fair value		0		42,180
Reclassification to nonredeemable noncontrolling interest		(3,259)		(5,136)
Put / call option exercise		(1,815)		(1,815)
Redeemable Noncontrolling Interest, Equity, Carrying Amount		190,347		190,347			185,417	140,860
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest		(999)		(741)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(211)		(919)
Temporary Equity, Accretion to Redemption Value, Adjustment		1,241		2,148
Revision of Prior Period, Adjustment
Background And Basis Of Presentation [Line Items]
Foreign Exchange		3,757		5,618
Redeemable Noncontrolling Interest, Equity, Carrying Amount		62,338		62,338			$ 60,044	$ 58,542
Temporary Equity, Accretion to Redemption Value, Adjustment		$ (1,463)		$ (1,822)
Capacity Marine
Background And Basis Of Presentation [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	87.00%		87.00%			80.00%
Octave Ventures
Background And Basis Of Presentation [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	70.00%		70.00%			60.00%
Octave Specialty Limited
Background And Basis Of Presentation [Line Items]
Redeemable Noncontrolling Interest, Equity, Other, Carrying Amount	$ 49,214		$ 49,214
Payable for Redeemable Noncontrolling Interest	$ 43,644		$ 43,644
Octave Specialty Limited \| Octave Specialty Limited \| Maximum [Member]
Background And Basis Of Presentation [Line Items]
Subsidiary, Ownership Percentage, Noncontrolling Owner	100.00%		100.00%			100.00%
Subsidiary, Ownership Percentage, Parent	70.00%		70.00%			60.00%
Octave Specialty Limited \| Octave Specialty Limited \| Minimum [Member]
Background And Basis Of Presentation [Line Items]
Subsidiary, Ownership Percentage, Noncontrolling Owner	51.00%		51.00%			51.00%
Subsidiary, Ownership Percentage, Parent	35.00%		35.00%			30.00%
Capacity Marine
Background And Basis Of Presentation [Line Items]
Redeemable Noncontrolling Interest, Equity, Other, Carrying Amount	$ 383		$ 383