Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2016
Accounting Policies [Abstract]
Consolidation	Consolidation We include all of our subsidiaries in our consolidated financial statements, eliminating all intercompany balances and transactions during consolidation.
Basis of Presentation	Basis of Presentation We prepare our consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”). While preparing our financial statements, we make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements, as well as reported amounts of revenue and expense during the reporting period. Accordingly, actual results could differ from those estimates. Reported amounts that require us to make extensive use of estimates include the fair values of assets and liabilities related to depreciation and amortization, the estimates used when computing share-based compensation expense, the estimated allowance for doubtful accounts receivable and the estimated cash flows we use in assessing the recoverability of long-lived assets, as well as the estimated fair values of certain assets related to write downs and impairments, contingencies and litigation, and claims and assessments. We prepared the accompanying unaudited Condensed Consolidated Balance Sheet as of March 31, 2016, with the audited Consolidated Balance Sheet amounts as of December 31, 2015 presented for comparative purposes, and the related unaudited Condensed Consolidated Statements of Operations and Statements of Cash Flows in accordance with the instructions for Form 10-Q and Article 10 of Regulation S-X. In compliance with those instructions, we have omitted certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with GAAP, though management believes the disclosures made herein are sufficient to ensure that the information presented is not misleading. Our results of operations and our cash flows as of the end of the interim periods reported herein do not necessarily indicate the results we may experience for the remainder of the year or for any other future period. Management believes our unaudited condensed consolidated interim financial statements include all the normal recurring adjustments necessary to fairly present our unaudited Condensed Consolidated Balance Sheet as of March 31, 2016, our unaudited Condensed Consolidated Statements of Operations and our unaudited Condensed Consolidated Statements of Cash Flows for all periods presented. You should read our unaudited condensed consolidated interim financial statements and footnotes in conjunction with our consolidated financial statements and footnotes included within our 2015 Form 10-K.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases, that changes the accounting for leases and requires expanded disclosures about leasing activities. Under the new guidance, lessees will be required to recognize a right-of-use asset and a lease liability, measured on a discounted basis, at the commencement date for all leases with terms greater than twelve months. Lessor accounting will remain largely unchanged, other than certain targeted improvements intended to align lessor accounting with the lessee accounting model and with the updated revenue recognition guidance issued in 2014. Lessees and lessors are required to apply a modified retrospective transition approach for leases existing at the beginning of the earliest comparative period presented in the adoption-period financial statements. Any leases that expire before the initial application date will not require any accounting adjustment. ASU 2016-02 is effective for annual and interim reporting periods beginning after December 15, 2018, and early application is permitted. We are currently evaluating the impact this guidance will have on its financial condition, results of operations, cash flows or the reporting thereof. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The amendments in ASU 2014-09 stipulate that an entity should recognize revenue in an amount which reflects the consideration to which the entity expects to be entitled in exchange for transferring goods or services to customers, and they provide a five-step process to assist entities with achieving that core principle. The ASU also specifies the accounting for some costs to obtain or fulfill a contract with a customer. With regard to disclosures, ASU 2014-09 states that entities should disclose sufficient information to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, and it requires qualitative and quantitative disclosures concerning contracts with customers, significant judgments and changes therein, and assets recognized from the costs incurred to obtain or fulfill a contract. The amendments in ASU 2014-09, have been deferred for one year and are effective for annual reporting periods beginning after December 15, 2017, including interim periods therein, and they permit either retrospective application to all prior periods or retrospective application with the cumulative effect of application recognized on the initial application date. Early adoption is permitted for annual and interim periods beginning after December 31, 2016. We are currently evaluating the impact this guidance will have on its financial condition, results of operations, cash flows or the reporting thereof. We have reviewed all other recently issued accounting pronouncements and, other than those we have disclosed above or in previous filings with the SEC, we do not believe any of such pronouncements will have a material effect on our operations. Reclassifications The unaudited condensed consolidated financial statements and related notes reflect certain reclassifications to prior year amounts in order to conform with current year presentation. The reclassifications have no effect on previously reported net income. In November 2015, the FASB issued an accounting standards update which changes the presentation of deferred taxes in classified balance sheets. The new guidance requires classification of all deferred tax assets and liabilities as well as applicable valuation allowances as non-current. The effective date for this guidance is for financial statements issued for annual and interim periods beginning after December 15, 2016. Early application is permitted. The guidance may be applied either prospectively to all deferred tax liabilities and assets or retrospectively to all periods presented. We have applied the guidance in the accompanying condensed consolidated financial statements with retrospective application for the Consolidated Balance Sheet at December 31, 2015. The effect of the accounting change in the prior year resulted in current deferred income taxes of $1.7 million, previously presented separately in current liabilities, to be added to $13.1 million in long-term deferred income taxes, for a revised $14.8 million in long-term deferred income taxes at December 31, 2015.