CONSOLIDATED AND CONDENSED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Class A and Class B Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Balance (in shares) at Dec. 31, 2018		90,748
Balance at Dec. 31, 2018	$ (330,721)	$ 91	$ 753,657	$ (1,082,689)	$ (1,780)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(200,389)			(200,389)
Other comprehensive income	796				796
Exercise of options to purchase common stock (in shares)		21
Exercise of options to purchase common stock	67		67
Issuance of common stock upon vesting of RSUs (in shares)		633
Issuance of common stock upon vesting of RSUs	1	$ 1
Shares withheld related to net settlement of RSUs (in shares)		(1)
Shares withheld related to net settlement of RSUs	(165)		(165)
Equity-based compensation expense	49,414		49,414
Balance (in shares) at Mar. 31, 2019		91,401
Balance at Mar. 31, 2019	(479,147)	$ 92	802,973	(1,281,228)	(984)
Balance (in shares) at Dec. 31, 2019		93,600
Balance at Dec. 31, 2019	(944,208)	$ 94	1,122,548	(2,065,423)	(1,427)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(285,865)			(285,865)
Other comprehensive income	2,069				2,069
Exercise of options to purchase common stock (in shares)		7
Exercise of options to purchase common stock	125		125
Issuance of common stock upon vesting of RSUs (in shares)		756
Issuance of common stock upon vesting of RSUs	0
Equity-based compensation expense	62,001		62,001
Balance (in shares) at Mar. 31, 2020		94,363
Balance at Mar. 31, 2020	$ (1,171,401)	$ 94	$ 1,184,674	$ (2,356,811)	$ 642