Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (51,614)	$ 15,195
Effective Income Tax Rate Reconciliation, Percent	33.80%	50.20%
U.S federal statutory rate, percent	35.00%	35.00%
Benefit related to certain income tax matters	$ 1,000
Write-off of unrealized deferred tax asset	$ 1,000	$ 4,000