Revenue - Opening and Closing Balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 705,509	$ 689,134	$ 689,134
Increase in accounts receivables	16,375
Contract assets, current	10,390	10,033
Increase in contract asset, current	357
Contract assets, non-current	57,538	31,521
Increase in contract asset, non-current	26,017
Deferred revenue, current	100,547	76,193
Increase in deferred revenue, current	24,354
Deferred revenue, non-current	66,485	$ 46,555
Increase in deferred revenue, non-current	19,930
Deferred revenue, revenue recognized	75,100
Revenue, remaining performance obligation	$ 7,800,000