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Income Tax (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income tax provision	$ 217,255	$ (124)	$ 216,976	$ (131)
Income tax provision, per diluted share (in USD per share)	$ 10.12		$ 10.27
Effective income tax rate, continuing operations (percent)			(596.00%)	3.00%
Effective income tax rate (percent)	(2983.00%)	9.00%	681.00%	3.00%
Valuation allowance	$ 9,100		$ 9,100
Unrecognized tax benefits	$ 8,300		$ 8,300

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Effective Income Tax Rate Reconciliation, Continuing Operations, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

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