Income Taxes - Provision (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
(Loss) before income taxes	$ (94,426)	$ (110,117)	$ (374,598)	$ (190,878)
Income tax (benefit)/provision	(25,764)	1,482	(49,209)	2,902
NET (LOSS)	$ (68,662)	$ (111,599)	$ (325,389)	$ (193,780)
Income tax as a percentage of (loss) before income taxes	27.30%	(1.30%)	13.10%	(1.50%)