Income Taxes	9 Months Ended
Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We recorded a benefit from income taxes of $139.3 million and $135.2 million for the three and nine months ended September 30, 2013, respectively, compared to a provision for income taxes of $11.2 million and $24.1 million for the three and nine months ended September 30, 2012, respectively. The benefit from income taxes for the three and nine months ended September 30, 2013 was primarily a result of a $124.6 million discrete tax benefit recognized as a result of the Merger as well as an $18.2 million discrete tax benefit recognized as a result of the reversal of a state valuation allowance further described below. Our effective income tax rate was (772.2)% and 37.5% for the nine months ended September 30, 2013 and September 30, 2012, respectively. The change in the effective income tax rate was primarily due to the tax benefits discussed above. We expect our effective income tax rate to range between 42% and 44% during the remainder of 2013. As of December 31, 2012, we had a valuation allowance of $18.2 million offsetting certain state net operating loss carryforwards and other state deferred tax assets. During the third quarter of 2013, after evaluating our ability to recover certain net operating loss carryforwards due to the change in tax structure as a result of the Merger, we determined that we will more likely than not be able to realize these deferred tax assets. As a result, we reversed the valuation allowance and recognized a corresponding tax benefit of $18.2 million. As a result of the JV Sale Transaction, we recognized $27.5 million and $0.9 million of incremental short-term deferred federal and state tax liabilities, respectively. The financial impact of the JV Sale Transaction and corresponding tax expense of $28.4 million was reflected in our consolidated financial statements for the year ended December 31, 2012. During the first quarter of 2013, approximately $163 million of short term deferred liabilities were reclassified to income taxes payable upon the consummation of the JV Sale Transaction. As a result of the close of the Merger on July 30, 2013, $132.5 million of this tax liability was extinguished, resulting in a remaining tax liability of approximately $30.5 million associated with the JV Sale Transaction. For further discussion regarding the JV Sale Transaction and the Merger, see Note 1 — “Basis of Presentation and Summary of Significant Accounting Policies” and Note 11 — “Commitments and Contingencies.”

Income Taxes

9 Months Ended

Sep. 30, 2013

We recorded a benefit from income taxes of $139.3 million and $135.2 million for the three and nine months ended September 30, 2013, respectively, compared to a provision for income taxes of $11.2 million and $24.1 million for the three and nine months ended September 30, 2012, respectively. The benefit from income taxes for the three and nine months ended September 30, 2013 was primarily a result of a $124.6 million discrete tax benefit recognized as a result of the Merger as well as an $18.2 million discrete tax benefit recognized as a result of the reversal of a state valuation allowance further described below. Our effective income tax rate was (772.2)% and 37.5% for the nine months ended September 30, 2013 and September 30, 2012, respectively. The change in the effective income tax rate was primarily due to the tax benefits discussed above. We expect our effective income tax rate to range between 42% and 44% during the remainder of 2013.

As of December 31, 2012, we had a valuation allowance of $18.2 million offsetting certain state net operating loss carryforwards and other state deferred tax assets. During the third quarter of 2013, after evaluating our ability to recover certain net operating loss carryforwards due to the change in tax structure as a result of the Merger, we determined that we will more likely than not be able to realize these deferred tax assets. As a result, we reversed the valuation allowance and recognized a corresponding tax benefit of $18.2 million.

As a result of the JV Sale Transaction, we recognized $27.5 million and $0.9 million of incremental short-term deferred federal and state tax liabilities, respectively. The financial impact of the JV Sale Transaction and corresponding tax expense of $28.4 million was reflected in our consolidated financial statements for the year ended December 31, 2012. During the first quarter of 2013, approximately $163 million of short term deferred liabilities were reclassified to income taxes payable upon the consummation of the JV Sale Transaction. As a result of the close of the Merger on July 30, 2013, $132.5 million of this tax liability was extinguished, resulting in a remaining tax liability of approximately $30.5 million associated with the JV Sale Transaction. For further discussion regarding the JV Sale Transaction and the Merger, see Note 1 — “Basis of Presentation and Summary of Significant Accounting Policies” and Note 11 — “Commitments and Contingencies.”