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Income Tax (Details) - USD ($)	3 Months Ended		9 Months Ended
Income Tax (Details) - USD ($)	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income tax provision	$ (160,000)	$ 191,881,000	$ 28,000	$ 191,602,000
Income tax provision, per diluted share (in USD per share)	$ 0.01
Income tax expense (benefit), continuing operations			(28,000)
Income tax provision from discontinued operation			$ 400,000
Effective income tax rate, continuing operations (percent)			42.00%	509.50%
Valuation allowance	$ 8,900,000		$ 8,900,000
Unrecognized tax benefits	$ 33,500,000		$ 33,500,000

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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