Revenue - Opening and Closing Balances (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 691,589	$ 689,134	$ 689,134
Increase in accounts receivables	2,455
Contract asset, current	10,688	10,033
Increase in contract asset, current	655
Contract asset, non-current	47,194	31,521
Increase in contract asset, non-current	15,673
Deferred revenue, current	84,709	76,193
Increase in deferred revenue, current	8,516
Deferred revenue, non-current	48,140	$ 46,555
Increase in deferred revenue, non-current	$ 1,585