Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Mar. 31, 2016
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation. The accompanying Condensed Consolidated Financial Statements have been prepared in accordance with: (i) generally accepted accounting principles in the United States (“GAAP”) for interim financial information; and (ii) the guidance of Rule 10-01 of Regulation S-X under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), for financial statements required to be filed with the Securities and Exchange Commission (the “SEC”). They reflect the historical Condensed Consolidated Statements of Operations and Comprehensive Income, Condensed Consolidated Balance Sheets, Condensed Consolidated Statement of Stockholders’ Equity and Condensed Consolidated Statements of Cash Flows of the Company for the periods presented. As permitted under such rules, certain notes and other financial information normally required by GAAP have been condensed or omitted. Management believes the accompanying Condensed Consolidated Financial Statements reflect all normal and recurring adjustments necessary for a fair statement of the Company’s financial position, results of operations and cash flows as of and for the periods presented herein. These Condensed Consolidated Financial Statements are unaudited and should be read in conjunction with the Company’s audited financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015. Prior to the spin-off, the Company’s financial statements were derived from the consolidated financial statements and accounting records of GHC. The Company’s Condensed Consolidated Financial Statements as of and for the period ended March 31, 2015 were prepared solely to present the Company’s historical results of operations, financial position and cash flows for the periods prior to the spin-off as it was historically managed. The impact of transactions between the Company and GHC was included in these Condensed Consolidated Financial Statements and was considered to be effectively settled for cash in the Condensed Consolidated Financial Statements at the time the transaction was recorded. The total net effect of the settlement of these intercompany transactions was reflected in the Condensed Consolidated Statements of Cash Flows as a financing activity. The Company functioned as part of the larger group of subsidiary companies controlled by GHC prior to the spin-off, and accordingly, GHC provided certain support and overhead functions to the Company. These functions included finance, human resources, legal, information technology, general insurance, risk management and other corporate functions. The costs of such services were allocated to the Company based on the most relevant allocation methods to the service provided. Management believed such allocations were reasonable and were consistently applied; however, they may not have been indicative of the actual expense that would have been incurred had the Company been operating on a stand-alone basis. See Notes 10 and 14 for details on these allocations. Additionally, prior to the spin-off, the Company participated in a centralized approach to cash management and in financing its operations managed by GHC. Cash was transferred to GHC and GHC funded the Company’s operating and investing activities as needed. Accordingly, cash and cash equivalents at GHC were not allocated to the Company in the Condensed Consolidated Financial Statements. GHC’s third-party debt, and the related interest expense, were not allocated to the Company for any of the periods presented as the Company was not the legal obligor on the debt and GHC borrowings were not directly attributable to the Company’s business. During the pre-spin periods presented, the Company’s income taxes have been prepared on a separate return basis as if the Company was a stand-alone entity. Prior to the spin-off, the Company’s operations were historically included in GHC’s consolidated U.S. Federal and certain state tax returns. The Company did not maintain taxes payable to/from GHC and was deemed to settle the annual current tax balances immediately with the legal tax-paying entities in respective jurisdictions. The Company’s results of operations for the three months ended March 31, 2016 and 2015 may not be indicative of the Company’s future results. In addition, as the Company did not operate as a stand-alone entity prior to July 1, 2015, the Condensed Consolidated Financial Statements included herein may not necessarily be indicative of the Company’s future performance and may not necessarily reflect what its financial position, results of operations or cash flows would have been had it operated as a stand-alone entity during all of the periods presented. Certain reclassifications have been made to prior period amounts to conform to the current year presentation. See the “Recently Adopted and Issued Accounting Pronouncements” section below for information regarding a balance sheet reclassification of deferred financing costs that resulted from the adoption of new accounting guidance. The Company also reclassified amounts in its Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2015 from Capital expenditures to Change in accrued expenses related to capital expenditures to conform to the current year presentation. This reclassification had no impact on the previously reported cash flows from investing activities.
Consolidation, Policy [Policy Text Block]	Principles of Consolidation. The accompanying Condensed Consolidated Financial Statements include the accounts of the Company and the Subsidiary. All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates in the Preparation of the Condensed Consolidated Financial Statements. The preparation of the Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and judgments that affect the amounts reported herein. Management bases its estimates and assumptions on historical experience and on various other factors that are believed to be reasonable under the circumstances. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be affected by changes in those estimates.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted and Issued Accounting Pronouncements. In May 2014, the Financial Accounting Standards Board (the “FASB”) issued comprehensive new guidance that supersedes all existing revenue recognition guidance. The new guidance requires revenue to be recognized when the Company transfers promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The new guidance also significantly expands the disclosure requirements for revenue recognition. This guidance, as amended, is effective for interim and fiscal years beginning after December 15, 2017. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The standard permits two implementation approaches, one requiring retrospective application of the new guidance with a restatement of prior years and one requiring prospective application of the new guidance with disclosure of results under the old guidance. The Company is in the process of evaluating the impact of this new guidance on its financial statements and believes such evaluation will extend over several future periods due to the significance of the changes to the Company’s policies and business processes. In August 2014, the FASB issued new guidance that requires management to assess the Company’s ability to continue as a going concern and to provide related disclosures in certain circumstances. This guidance is effective for interim and fiscal years ending after December 15, 2016, with early adoption permitted. The Company does not expect this guidance to have an impact on its financial statements. In April 2015, the FASB issued new guidance to simplify the presentation of debt issuance costs. This guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by this guidance. The new guidance should be applied on a full retrospective basis to all periods presented. This guidance is effective for interim and fiscal years beginning after December 15, 2015. In accordance with the provisions of the new guidance, the Company has recorded unamortized debt issuance costs net of the long-term debt liability in the accompanying Condensed Consolidated Balance Sheets as of March 31, 2016 and December 31, 2015. This resulted in a reclassification of deferred financing costs, which caused a reduction of $9.8 million to Long-term debt, $1.6 million to Current Assets and $8.2 million to Other assets in the accompanying Condensed Consolidated Balance Sheet as of December 31, 2015. In September 2015, the FASB issued new guidance that requires that an acquirer retrospectively adjust provisional amounts reflected in its financial statements arising from a business combination during the measurement period. To simplify the accounting for adjustments made to provisional amounts, the guidance requires that the acquirer reflect adjustments to provisional amounts that are identified during the measurement period in the financial statements for the reporting period in which the adjustment amount is determined. The acquirer is required to also record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the adjustment had been completed at the acquisition date. In addition, an entity is required to present separately on the face of the income statement or disclose in the notes to the financial statements the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. This guidance is effective for fiscal years beginning after December 15, 2016 and interim periods within fiscal years beginning after December 15, 2017. The amendments in this guidance should be applied prospectively to adjustments to provisional amounts that occur after the effective date of this guidance, with early adoption permitted. The Company does not expect this guidance to have an impact on its financial statements unless an acquisition is made. In February 2016, the FASB issued new guidance that requires a lessee to record a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. This guidance is effective for interim and fiscal years beginning after December 15, 2018. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is in the process of evaluating the impact of its pending adoption of this new guidance on its financial statements. In March 2016, the FASB issued new guidance affecting several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. This guidance is effective for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years, with early adoption permitted. If an entity early adopts this guidance in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. An entity that elects early adoption must adopt all of the guidance in the same period. The Company is in the process of evaluating the impact of its pending adoption of this new guidance on its financial statements.