Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Cash Flows [Abstract]
Receivable from related party	$ 943	$ 0	$ 0
Deferred revenue from related party	185,379	0	0
Other long term liabilities from related party	$ 9,703	$ 0	$ 0