Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Income Taxes

	Three Months Ended						Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
	(in thousands, except percentages)
Provision for (benefit from) income taxes	$	44,287		$	(51,638	)	$	53,779		$	(6,068	)
Effective tax rate	10		%	(370		)%	7		%	(3		)%