Fair Value Measurements - Assets and liabilities that were recognized at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Recurring
Assets
Employee phantom share receivable asset	$ 15	$ 8,574
Liabilities
Contingent stock liability		130,594
Total	338,650	506,755
Employee Phantom Share Receivable Liabilities, Fair Value Disclosure	129,716	57,752
Employee Phantom Share Receivable Non Current Liabilities, Fair Value Disclosure	5,705	393
Warrant Liability, Fair Value Disclosure	195,952	312,751
Recurring | Level 2
Assets
Employee phantom share receivable asset	15	8,574
Liabilities
Contingent stock liability		130,594
Total	142,698	194,004
Employee Phantom Share Receivable Liabilities, Fair Value Disclosure	129,716	57,752
Employee Phantom Share Receivable Non Current Liabilities, Fair Value Disclosure	5,705	393
Warrant Liability, Fair Value Disclosure	195,952
Recurring | Level 3
Liabilities
Total	195,952	312,751
Warrant Liability, Fair Value Disclosure	195,952	312,751
Interest rate swap asset
Liabilities
Interest rate swap liability	2,651	5,159
Interest rate swap asset | Recurring
Liabilities
Interest rate swap liability	2,651	5,159
Foreign exchange forward
Assets
Forward contracts asset	15	8,574
Liabilities
Interest rate swap liability	(4,626)	(106)
Foreign exchange forward | Recurring
Liabilities
Foreign Currency Contract, Asset, Fair Value Disclosure	15	8,574
Foreign Currency Contracts, Liability, Fair Value Disclosure	4,626	106
Foreign exchange forward | Recurring | Level 2
Liabilities
Foreign Currency Contract, Asset, Fair Value Disclosure	15	8,574
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ 4,626	$ 106