Income Taxes	3 Months Ended
Mar. 31, 2018
Income Taxes [Abstract]
Income Taxes	13.INCOME TAXES The primary reason for the difference in the Company’s effective tax rate and the U.S. statutory rate is a result of the Company’s REIT election and the Company having a full valuation allowance on the U.S. net deferred tax assets of the taxable REIT subsidiaries (“TRSs”). The Company has concluded that it is not more likely than not that its deferred tax assets will be realized and has recorded a full valuation allowance. A foreign tax provision is recognized because certain international subsidiaries of the Company have profitable operations or are in a net deferred tax liability position. The Company elected to be taxed as a REIT commencing with its taxable year ended December 31, 2016. As a REIT, the Company generally will be entitled to a deduction for dividends that it pays, and therefore, not subject to U.S. federal corporate income tax on that portion of its net income that it distributes to its shareholders. As a REIT, the Company will continue to pay U.S. federal income tax on earnings, if any, from assets and operations held through its TRSs. These assets and operations currently consist primarily of the Company’s site development services and its international operations. The Company’s international operations would continue to be subject, as applicable, to foreign taxes in the jurisdictions in which those operations are located. The Company may also be subject to a variety of taxes, including payroll taxes and state, local, and foreign income, property, and other taxes on its assets and operations. The Company’s determination as to the timing and amount of future dividend distributions will be based on a number of factors, including REIT distribution requirements, its existing federal net operating losses (“NOLs”) of approximately $1.0 billion as of December 31, 2017, the Company’s financial condition, earnings, debt covenants, and other possible uses of such funds. The Company may use these NOLs to offset its REIT taxable income, and thus any required distributions to shareholders may be reduced or eliminated until such time as the NOLs have been fully utilized. The Tax Cuts and Jobs Act (the “Tax Act”) was enacted on December 22, 2017. The Tax Act reduces the U.S. federal corporate income tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. The Company is applying the guidance in Staff Accounting Bulletin No. 118 when accounting for the enactment-date effects of the Tax Act. As of March 31, 2018, the Company has not recognized any adjustments to the provisional amounts recorded at December 31, 2017. As additional guidance becomes available related to the Tax Act, the Company will continue to refine its calculations. These estimates may also be affected as the Company gains a more thorough understanding of the Tax Act. These changes may be material to income tax expense. The global intangible low-taxed income (“GILTI”) provisions of the Tax Act impose a tax on the income of certain foreign subsidiaries in excess of a specified return on tangible assets used by the foreign companies. FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred. Given the complexity of the GILTI provisions, the Company is still evaluating the effects of the GILTI provisions and has not yet determined the new accounting policy it intends to elect. At March 31, 2018, because the Company is still evaluating the GILTI provisions and the analysis of future taxable income subject to GILTI, the Company has included GILTI related to current-year operations only and have not provided additional GILTI on deferred items.

13.INCOME TAXES

The primary reason for the difference in the Company’s effective tax rate and the U.S. statutory rate is a result of the Company’s REIT election and the Company having a full valuation allowance on the U.S. net deferred tax assets of the taxable REIT subsidiaries (“TRSs”). The Company has concluded that it is not more likely than not that its deferred tax assets will be realized and has recorded a full valuation allowance. A foreign tax provision is recognized because certain international subsidiaries of the Company have profitable operations or are in a net deferred tax liability position.

The Company elected to be taxed as a REIT commencing with its taxable year ended December 31, 2016. As a REIT, the Company generally will be entitled to a deduction for dividends that it pays, and therefore, not subject to U.S. federal corporate income tax on that portion of its net income that it distributes to its shareholders. As a REIT, the Company will continue to pay U.S. federal income tax on earnings, if any, from assets and operations held through its TRSs. These assets and operations currently consist primarily of the Company’s site development services and its international operations. The Company’s international operations would continue to be subject, as applicable, to foreign taxes in the jurisdictions in which those operations are located. The Company may also be subject to a variety of taxes, including payroll taxes and state, local, and foreign income, property, and other taxes on its assets and operations. The Company’s determination as to the timing and amount of future dividend distributions will be based on a number of factors, including REIT distribution requirements, its existing federal net operating losses (“NOLs”) of approximately $1.0 billion as of December 31, 2017, the Company’s financial condition, earnings, debt covenants, and other possible uses of such funds. The Company may use these NOLs to offset its REIT taxable income, and thus any required distributions to shareholders may be reduced or eliminated until such time as the NOLs have been fully utilized.

The Tax Cuts and Jobs Act (the “Tax Act”) was enacted on December 22, 2017. The Tax Act reduces the U.S. federal corporate income tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. The Company is applying the guidance in Staff Accounting Bulletin No. 118 when accounting for the enactment-date effects of the Tax Act. As of March 31, 2018, the Company has not recognized any adjustments to the provisional amounts recorded at December 31, 2017. As additional guidance becomes available related to the Tax Act, the Company will continue to refine its calculations. These estimates may also be affected as the Company gains a more thorough understanding of the Tax Act. These changes may be material to income tax expense.

The global intangible low-taxed income (“GILTI”) provisions of the Tax Act impose a tax on the income of certain foreign subsidiaries in excess of a specified return on tangible assets used by the foreign companies. FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred. Given the complexity of the GILTI provisions, the Company is still evaluating the effects of the GILTI provisions and has not yet determined the new accounting policy it intends to elect. At March 31, 2018, because the Company is still evaluating the GILTI provisions and the analysis of future taxable income subject to GILTI, the Company has included GILTI related to current-year operations only and have not provided additional GILTI on deferred items.