Income Taxes	3 Months Ended
Mar. 31, 2016
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income Taxes	Income Taxes We have historically calculated our provision for income taxes during interim reporting periods by applying the estimated annual effective tax rate for the full fiscal year to pre-tax income or loss, excluding discrete items, for the reporting period. We determined that since small changes in estimated pre-tax income or loss would result in significant changes in the estimated annual effective tax rate, the historical method would not provide a reliable estimate of income taxes for the quarter ended March 31, 2017. We used a discrete effective tax rate method to calculate income taxes for the quarter ended March 31, 2017. We will continue to evaluate income tax estimates under the historical method in subsequent quarters and employ a discrete effective tax rate method if warranted. Discrete income tax expense for the quarter ended March 31, 2017 was $7.6 million and was primarily attributable to the Exchange Offers, a restructuring transaction and the effective settlement of a liability for unrecognized tax benefits associated with a tax position taken in prior years. Discrete income tax expense for the quarter ended March 31, 2016 was $3.4 million and was primarily attributable to the recognition of liabilities for unrecognized tax benefits associated with tax positions taken in prior years.

Income Taxes

3 Months Ended

Mar. 31, 2016

Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]

We have historically calculated our provision for income taxes during interim reporting periods by applying the estimated annual effective tax rate for the full fiscal year to pre-tax income or loss, excluding discrete items, for the reporting period. We determined that since small changes in estimated pre-tax income or loss would result in significant changes in the estimated annual effective tax rate, the historical method would not provide a reliable estimate of income taxes for the quarter ended March 31, 2017. We used a discrete effective tax rate method to calculate income taxes for the quarter ended March 31, 2017. We will continue to evaluate income tax estimates under the historical method in subsequent quarters and employ a discrete effective tax rate method if warranted.

Discrete income tax expense for the quarter ended March 31, 2017 was $7.6 million and was primarily attributable to the Exchange Offers, a restructuring transaction and the effective settlement of a liability for unrecognized tax benefits associated with a tax position taken in prior years. Discrete income tax expense for the quarter ended March 31, 2016 was $3.4 million and was primarily attributable to the recognition of liabilities for unrecognized tax benefits associated with tax positions taken in prior years.