Revenues - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Short-term deferred revenues, net	$ 100,053	$ 90,894
Deferred cost of sales	21,000	13,100
Deferred revenues recognized	84,000
Gross short-term deferred revenue		104,000
Long-term deferred revenues	$ 5,673	$ 7,083