Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax [Line Items]
Effective income tax rate (as percent)	81.50%	28.60%	407.40%	34.50%
U.S. Federal statutory rate (as percent)	21.00%		21.00%
Tax benefit recognized due to valuation allowances and French business tax	$ 0		$ 0
Gross unrecognized tax benefits	$ 68,200,000		$ 68,200,000		$ 69,500,000
Earliest Tax Year
Income Tax [Line Items]
Income tax examination year under examination			2013
Latest Tax Year
Income Tax [Line Items]
Income tax examination year under examination			2020