Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	We have prepared the accompanying unaudited consolidated financial statements in accordance with generally accepted accounting principles in the United States of America, or GAAP. We consolidated our wholly-owned subsidiaries and eliminated all significant intercompany balances and transactions. We have also prepared the accompanying unaudited consolidated financial statements in conformity with the instructions to Form 10-Q and Article 10 of Regulation S-X and, consequently, they do not include all of the annual disclosures required by GAAP. Reference is made to our Annual Report on Form 10-K for the year ended December 31, 2012, for additional disclosures, including a summary of our significant accounting policies. There have been no changes to our significant accounting policies during the six months ended June 30, 2013. In our opinion, the accompanying unaudited consolidated financial statements contain all adjustments, consisting of normal and recurring items, except as otherwise noted, necessary for the fair presentation of our financial position, results of operations and cash flows for the interim periods presented. The results of operations and cash flows for the six months ended June 30, 2013 are not necessarily indicative of future results.
Recent Accounting Pronouncements, Policy	In February 2013, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2013-02, Comprehensive Income: Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which requires companies to report, in one place, information about significant reclassifications out of accumulated other comprehensive income, or AOCI, and disclose more information about changes in AOCI balances. We adopted this ASU in the first quarter of 2013. The adoption of this standard did not have a significant impact on our consolidated financial statements.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2013

Basis of Presentation and Significant Accounting Policies

We have prepared the accompanying unaudited consolidated financial statements in accordance with generally accepted accounting principles in the United States of America, or GAAP. We consolidated our wholly-owned subsidiaries and eliminated all significant intercompany balances and transactions.

We have also prepared the accompanying unaudited consolidated financial statements in conformity with the instructions to Form 10-Q and Article 10 of Regulation S-X and, consequently, they do not include all of the annual disclosures required by GAAP. Reference is made to our Annual Report on Form 10-K for the year ended December 31, 2012, for additional disclosures, including a summary of our significant accounting policies. There have been no changes to our significant accounting policies during the six months ended June 30, 2013. In our opinion, the accompanying unaudited consolidated financial statements contain all adjustments, consisting of normal and recurring items, except as otherwise noted, necessary for the fair presentation of our financial position, results of operations and cash flows for the interim periods presented. The results of operations and cash flows for the six months ended June 30, 2013 are not necessarily indicative of future results.

Recent Accounting Pronouncements, Policy

In February 2013, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2013-02, Comprehensive Income: Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which requires companies to report, in one place, information about significant reclassifications out of accumulated other comprehensive income, or AOCI, and disclose more information about changes in AOCI balances. We adopted this ASU in the first quarter of 2013. The adoption of this standard did not have a significant impact on our consolidated financial statements.