Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income tax provision	$ (13,526,000)	$ (8,726,000)	$ (31,725,000)	$ (4,635,000)
Effective income tax rate	31.90%	43.20%	26.10%	17.90%
Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense			$ 0