Revenue Recognition Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Deferred revenue	$ 120,643	$ 177,266	$ 120,643	$ 135,578
Customer deposits			33,069	66,171
Deferred revenue and customer deposits			$ 153,712	$ 201,749
Change in Contract with Customer, Liability [Abstract]
Beginning balance	135,578	175,455
Additions	156,586	138,387
Revenue recognized	(171,521)	(136,576)
Ending balance	$ 120,643	$ 177,266