Fair Value Measurements - Assets and liabilities that were recognized at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Recurring
Assets
Employee phantom share receivable asset	$ 168,087	$ 197,344
Liabilities
Contingent stock liability		130,594
Total	453,719	660,442
Employee Phantom Share Receivable Asset, Fair Value Disclosure		188,770
Employee Phantom Share Receivable Liabilities, Fair Value Disclosure	171,889	193,162
Employee Phantom Share Receivable Non Current Liabilities, Fair Value Disclosure	16,583	18,670
Warrant Liability, Fair Value Disclosure	257,944	312,751
Recurring | Level 2
Assets
Employee phantom share receivable asset	168,087	197,344
Liabilities
Contingent stock liability		130,594
Total	195,775	347,691
Employee Phantom Share Receivable Asset, Fair Value Disclosure	168,006	188,770
Employee Phantom Share Receivable Liabilities, Fair Value Disclosure	171,889	193,162
Employee Phantom Share Receivable Non Current Liabilities, Fair Value Disclosure	16,583	18,670
Recurring | Level 3
Liabilities
Total	257,944	312,751
Warrant Liability, Fair Value Disclosure	257,944	312,751
Interest rate swap asset
Liabilities
Interest rate swap liability	3,394	5,159
Interest rate swap asset | Recurring
Liabilities
Interest rate swap liability	3,394	5,159
Foreign exchange forward
Assets
Forward contracts asset	81	8,574
Liabilities
Interest rate swap liability	3,909	(106)
Foreign exchange forward | Recurring
Liabilities
Foreign Currency Contract, Asset, Fair Value Disclosure	81	8,574
Foreign Currency Contracts, Liability, Fair Value Disclosure	3,909	106
Foreign exchange forward | Recurring | Level 2
Liabilities
Foreign Currency Contract, Asset, Fair Value Disclosure	81	8,574
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ 3,909	$ 106