Summary of Significant Accounting Policies (Notes)	3 Months Ended
Mar. 31, 2013
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The consolidated financial statements of the Company included herein were prepared in conformity with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The information furnished includes all adjustments and accruals of a normal recurring nature, which, in the opinion of management, are necessary for a fair presentation of results for the interim periods. The results of operations for the three months ended March 31, 2013 are not necessarily indicative of the results for the entire year or any subsequent interim period. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2012, which are included in the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 28, 2013. There have been no significant changes to these policies during the three months ended March 31, 2013, other than the updates described below. Reclassification Certain reclassifications have been made to the previously issued historical financial statements of the Company and ARCT III to conform to this presentation. Recent Accounting Pronouncements In December 2011, the Financial Accounting Standards Board (“FASB”) issued guidance regarding disclosures about offsetting assets and liabilities, which requires entities to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position. The guidance is effective for fiscal years and interim periods beginning on or after January 1, 2013 with retrospective application for all comparative periods presented. The adoption of this guidance, which is related to disclosure only, did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. Refer to Note 9 — Derivatives and Hedging Activities for the Company's disclosure of information about offsetting and related arrangements. In July 2012, the FASB issued revised guidance intended to simplify how an entity tests indefinite-lived intangible assets for impairment. The amendments will allow an entity first to assess qualitative factors to determine whether it is necessary to perform a quantitative impairment test. An entity will no longer be required to calculate the fair value of an indefinite-lived intangible asset and perform the quantitative test unless the entity determines, based on a qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. The amendments are effective for annual and interim indefinite-lived intangible asset impairment tests performed for fiscal years beginning after September 15, 2012. Early adoption was permitted. The adoption of this guidance did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. In February 2013, the FASB issued guidance which requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. The guidance is effective for annual and interim periods beginning after December 15, 2012 with early adoption permitted. The adoption of this guidance, which is related to disclosure only, did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. Refer to Note 9 — Derivatives and Hedging Activities for the Company's disclosure of the information about the amounts reclassified out of accumulated other comprehensive income by component. In February 2013, the FASB issued new accounting guidance clarifying the accounting and disclosure requirements for obligations resulting from joint and several liability arrangements for which the total amount under the arrangement is fixed at the reporting date. The new guidance is effective for fiscal years, and interim periods within those fiscal years, beginning on or after December 15, 2013. The Company does not expect the adoption of this guidance to have a material impact on the Company's consolidated financial position, results of operations or cash flows.

Summary of Significant Accounting Policies

The consolidated financial statements of the Company included herein were prepared in conformity with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The information furnished includes all adjustments and accruals of a normal recurring nature, which, in the opinion of management, are necessary for a fair presentation of results for the interim periods. The results of operations for the three months ended March 31, 2013 are not necessarily indicative of the results for the entire year or any subsequent interim period.

These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2012, which are included in the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 28, 2013. There have been no significant changes to these policies during the three months ended March 31, 2013, other than the updates described below.

Reclassification

Certain reclassifications have been made to the previously issued historical financial statements of the Company and ARCT III to conform to this presentation.

Recent Accounting Pronouncements

In December 2011, the Financial Accounting Standards Board (“FASB”) issued guidance regarding disclosures about offsetting assets and liabilities, which requires entities to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position. The guidance is effective for fiscal years and interim periods beginning on or after January 1, 2013 with retrospective application for all comparative periods presented. The adoption of this guidance, which is related to disclosure only, did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. Refer to Note 9 — Derivatives and Hedging Activities for the Company's disclosure of information about offsetting and related arrangements.

In July 2012, the FASB issued revised guidance intended to simplify how an entity tests indefinite-lived intangible assets for impairment. The amendments will allow an entity first to assess qualitative factors to determine whether it is necessary to perform a quantitative impairment test. An entity will no longer be required to calculate the fair value of an indefinite-lived intangible asset and perform the quantitative test unless the entity determines, based on a qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. The amendments are effective for annual and interim indefinite-lived intangible asset impairment tests performed for fiscal years beginning after September 15, 2012. Early adoption was permitted. The adoption of this guidance did not have a material impact on the Company's consolidated financial position, results of operations or cash flows.

In February 2013, the FASB issued guidance which requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. The guidance is effective for annual and interim periods beginning after December 15, 2012 with early adoption permitted. The adoption of this guidance, which is related to disclosure only, did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. Refer to Note 9 — Derivatives and Hedging Activities for the Company's disclosure of the information about the amounts reclassified out of accumulated other comprehensive income by component.

In February 2013, the FASB issued new accounting guidance clarifying the accounting and disclosure requirements for obligations resulting from joint and several liability arrangements for which the total amount under the arrangement is fixed at the reporting date. The new guidance is effective for fiscal years, and interim periods within those fiscal years, beginning on or after December 15, 2013. The Company does not expect the adoption of this guidance to have a material impact on the Company's consolidated financial position, results of operations or cash flows.