Revenue - Opening and Closing Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 684,642	$ 676,738
Increase in accounts receivables	7,904
Contract assets, current	29,671	13,534
Increase in contract asset, current	16,137
Contract assets, non-current	50,546	54,050
Increase in contract asset, non-current	(3,504)
Deferred revenue, current	105,283	101,258
Increase in deferred revenue, current	4,025
Deferred revenue, non-current	64,648	$ 71,242
Increase in deferred revenue, non-current	$ (6,594)