Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ (66,257,000)	$ (18,399,000)	$ (63,355,000)	$ (41,951,000)
(Loss) before income taxes	(18,587,000)	$ (88,539,000)	(209,465,000)	$ (228,822,000)
Valuation allowance	93,600,000		93,600,000
Unrecognized tax benefits	2,100,000		2,100,000
Unrecognized tax benefits that would impact the Company's effective tax rate	2,100,000		2,100,000
Unrecognized tax benefits, income tax penalties expense			0
Unrecognized tax benefits, interest on income taxes expense			100,000
Unrecognized tax benefits, income tax penalties accrued	0		0
Unrecognized tax benefits, interest on income taxes accrued	$ 200,000		$ 200,000