Description of Operations and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2016
Description of Operations and Summary of Significant Accounting Policies
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In our opinion, the unaudited condensed consolidated financial statements have been prepared on the same basis as audited consolidated financial statements and include all adjustments, consisting of only normal recurring adjustments, necessary for the fair presentation of our financial position, results of operations, comprehensive income and cash flows. The interim results are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2016 or any other period. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2015 filed with the Securities and Exchange Commission (“SEC”) on February 24, 2016.
Variable Interest Entity	Variable Interest Entity We evaluate our ownership, contractual and other interest in entities to determine if they are variable interest entities (“VIE”), whether we have a variable interest in those entities and the nature and extent of those interests. Based on our evaluations, if we determine we are the primary beneficiary of such VIEs, we consolidate such entities into our financial statements. We consolidate the financial results of TRC, which we have determined to be a VIE, because we have the power to direct the economically significant activities of TRC and the obligation to absorb losses of, or the right to receive benefits from, TRC. The financial position and results of operations of TRC are not material for the periods presented.
Recently Issued Accounting Pronouncements Not Yet Adopted	Recently Issued Accounting Pronouncements Not Yet Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases, which supersedes the lease recognition requirements in ASC Topic 840, Leases. The standard requires an entity to recognize right-of-use assets and lease liabilities arising from a lease for both financing and operating leases in the consolidated balance sheets but recognize the impact on the consolidated statement of operations and cash flows in a similar manner under current GAAP. The standard also requires additional qualitative and quantitative disclosures. The standard is effective for us beginning January 1, 2019, although early adoption is permitted. We are currently evaluating adoption methods and whether this standard will have a material impact on our consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, which provides guidance for the recognition, measurement, presentation, and disclosure of financial assets and liabilities. This standard is effective for us beginning January 1, 2018. We are evaluating the effects of the adoption of this ASU to our consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled to in exchange for the transfer of promised goods or services to customers. The standard will replace nearly all existing revenue recognition guidance under GAAP when it becomes effective. In July 2015, the FASB decided to defer the effective date by one year. Thus, the standard will be effective for us beginning January 1, 2018, at which time we may adopt the standard under either the full retrospective method or the modified retrospective method. Early adoption on or after January 1, 2017 would be permitted. We are currently evaluating the effect that the new standard will have on our consolidated financial statements and related disclosures.
Recently Adopted Accounting Pronouncement	Recently Adopted Accounting Pronouncement In April 2015, the FASB issued ASU 2015-03, Interest — Imputation of Interest (“ASU 2015-03”), to simplify the presentation of debt issuance costs. This standard amended existing guidance to require the presentation of debt issuance costs associated with term loans in the balance sheet as a deduction from the carrying amount of the related debt liability instead of a deferred charge. We adopted ASU 2015-03 on January 1, 2016. Upon adoption of ASU 2015-03, we applied the guidance retrospectively to all periods presented and classified our debt issuance costs, which prior to adoption were included in other assets in the condensed consolidated financial statements, as a deduction to our respective long-term debts.

Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined).