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Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract liability, revenue recognized	$ 63,960	$ 43,107	$ 240,638	$ 156,084
Accounts receivable	6,817		6,817		$ 12,398
Impairment on capitalized costs	0	$ 0	0	$ 0
Remaining performance obligation	$ 704,862		$ 704,862
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation, percentage	47.00%		47.00%
Remaining performance obligation, timing of satisfaction	12 months		12 months
Disaggregation of Revenue [Line Items]
Remaining performance obligation, timing of satisfaction	12 months		12 months