Revenue - Opening and Closing Balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 792,101	$ 676,738
Increase in accounts receivables	115,363
Contract assets, current	49,793	13,534
Increase in contract asset, current	36,259
Contract assets, non-current	51,452	54,050
Increase in contract asset, non-current	(2,598)
Deferred revenue, current	112,952	101,258
Increase in deferred revenue, current	11,694
Deferred revenue, non-current	66,318	$ 71,242
Increase in deferred revenue, non-current	$ (4,924)