Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Interest expense carryforwards	$ 355,202	$ 251,985
Software developed for internal use	159,172	198,354
Tax loss carryforwards	140,844	188,202
Tax credit carryforwards	103,103	96,135
Employee benefits other than pension	22,393	31,874
Deferred revenue	19,509	27,320
Lease liabilities	13,057	14,803
Suspended loss	14,723	14,737
Pension obligations	7,389	11,087
Accrued expenses	6,413	10,901
Incentive consideration	3,067	4,223
Other	1,751	1,324
Total deferred tax assets	846,623	850,945
Deferred tax liabilities:
Intangible assets	(67,193)	(81,467)
Non U.S. operations	(22,588)	(24,982)
Right of use assets	(12,033)	(14,126)
Unrealized gains and losses	(15,792)	(16,016)
Investment in partnership	(10,632)	(10,345)
Bond discounts	(10,346)	(2,078)
Depreciation and amortization	(3,388)	(3,255)
Total deferred tax liabilities	(141,972)	(152,269)
Valuation allowance	(737,391)	(727,805)
Net deferred tax liability	$ (32,740)	(29,129)
Discontinued operations deferred tax liability		$ 7,000