Income Taxes	3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Note 3—Income Taxes Our effective income tax rate for continuing operations for the three months ended March 31, 2013 was 0.7%, or an expense of $0.6 million, as compared to an effective tax rate of 55.8%, or a benefit of $0.4 million, for the corresponding prior-year periods. Our tax rate differs from the statutory rate of 35.0% due to the effects of permanent items, the recording of a valuation allowance adjustment against a portion of our deferred tax assets, and a reserve for unrecognized tax benefits. A substantial portion of our tax provision represents state taxes in the jurisdiction of Indiana and Louisiana where we have no valuation allowance. It is reasonably possible that the total amount of unrecognized tax benefits may increase by up to $4.0 million during the next twelve months. We file income tax returns in federal and state jurisdictions and are no longer subject to federal income tax examinations for tax years prior to 2011 and state income tax examinations for tax years prior to 2000. In 2012, our federal tax return was examined by the Internal Revenue Service for tax years 2009 and 2010. The examination concluded in January 2013 with adjustments to certain timing items that had an immaterial impact on our 2012 income tax expense.

Income Taxes

3 Months Ended

Mar. 31, 2013

Note 3—Income Taxes

Our effective income tax rate for continuing operations for the three months ended March 31, 2013 was 0.7%, or an expense of $0.6 million, as compared to an effective tax rate of 55.8%, or a benefit of $0.4 million, for the corresponding prior-year periods. Our tax rate differs from the statutory rate of 35.0% due to the effects of permanent items, the recording of a valuation allowance adjustment against a portion of our deferred tax assets, and a reserve for unrecognized tax benefits. A substantial portion of our tax provision represents state taxes in the jurisdiction of Indiana and Louisiana where we have no valuation allowance. It is reasonably possible that the total amount of unrecognized tax benefits may increase by up to $4.0 million during the next twelve months.

We file income tax returns in federal and state jurisdictions and are no longer subject to federal income tax examinations for tax years prior to 2011 and state income tax examinations for tax years prior to 2000. In 2012, our federal tax return was examined by the Internal Revenue Service for tax years 2009 and 2010. The examination concluded in January 2013 with adjustments to certain timing items that had an immaterial impact on our 2012 income tax expense.