Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of effective income tax rate and income tax expense (benefit)

The following table summarizes our effective tax rate and income tax expense (benefit) for the three and six months ended June 30, 2018 and 2017 (in thousands except for percentages):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Effective tax rate	197		%	38		%	(113		)%	38		%
Income tax expense (benefit)	$	52,556		$	(8,659	)	$	44,556		$	(30,120	)