Summary of Significant Accounting Policies - Summary of Changes in Deferred Income (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Short-term
Balance at December 31, 2019	$ 369,475
Recognition of beginning deferred revenue into revenue, as a result of performance obligations satisfied	(155,456)
Cash received in advance during the period	241,930
Recognition of cash received in the period into revenue, as a result of performance obligations satisfied	(116,738)
Impact of foreign exchange rates	(2,590)
Reclassification between short-term and long-term	40,897
Balance at March 31, 2020	377,518
Long-term
Balance at December 31, 2019	99,652
Recognition of beginning deferred revenue into revenue, as a result of performance obligations satisfied	0
Cash received in advance during the period	43,337
Recognition of cash received in the period into revenue, as a result of performance obligations satisfied	0
Impact of foreign exchange rates	0
Reclassification between short-term and long-term	(40,897)
Balance at March 31, 2020	$ 102,092