Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tax Credit Carryforward [Line Items]
Deferred tax liabilities as a result of TCJA			$ 34,200
Valuation allowance	$ 170,322	$ 143,315	83,400	$ 56,700
Period of cumulative changes in ownership interests	3 years
Percentage of cumulative changes in ownership interests	50.00%
Increase in valuation allowance	$ 27,000	$ 59,900	$ 26,700
Federal tax authority
Tax Credit Carryforward [Line Items]
Valuation allowance	1,100
Net operating loss carry-forwards	495,600
Federal tax authority | Current Receivable
Tax Credit Carryforward [Line Items]
Valuation allowance	700
State tax authority
Tax Credit Carryforward [Line Items]
Net operating loss carry-forwards	510,300
Foreign tax authority
Tax Credit Carryforward [Line Items]
Net operating loss carry-forwards	$ 68,100