Basis of Presentation	6 Months Ended
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Note 1. Basis of Presentation The accompanying condensed consolidated financial statements of Hospitality Properties Trust and its subsidiaries, or HPT, we, our or us, are unaudited. Certain information and disclosures required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements have been condensed or omitted. We believe the disclosures made are adequate to make the information presented not misleading. However, the accompanying condensed consolidated financial statements should be read in conjunction with the financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2017, as amended, or our 2017 Annual Report. In the opinion of management, all adjustments, consisting of normal recurring accruals considered necessary for a fair statement of results for the interim period, have been included. These condensed consolidated financial statements include the accounts of HPT and our subsidiaries, all of which are 100% owned directly or indirectly by HPT. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated. Our operating results for interim periods and those of our managers and tenants are not necessarily indicative of the results that may be expected for the full year. Reclassifications have been made to the prior years’ condensed consolidated financial statements to conform to the current year’s presentation. The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts. Actual results could differ from those estimates. Significant estimates in our condensed consolidated financial statements include the allowance for doubtful accounts, purchase price allocations, useful lives of fixed assets, impairment of real estate and the valuation of intangible assets. We have determined that each of our wholly owned taxable REIT subsidiaries, or TRSs, is a variable interest entity, or VIE, as defined under the Consolidation Topic of the Financial Accounting Standards Board, or FASB, Accounting Standards Codification™. We have concluded that we must consolidate each of our TRSs because we are the entity with the power to direct the activities that most significantly impact such VIEs’ performance and we have the obligation to absorb losses or the right to receive benefits from each VIE that could be significant to the VIE and are, therefore, the primary beneficiary of each VIE. The assets of our TRSs were $38,962 and $33,305 as of June 30, 2018 and December 31, 2017, respectively, and consist primarily of amounts due from and working capital advances to certain of our hotel managers. The liabilities of our TRSs were $194,649 and $140,897 as of June 30, 2018 and December 31, 2017, respectively, and consist primarily of security deposits they hold and amounts payable to certain of our hotel managers. The assets of our TRSs are available to satisfy our TRSs’ obligations and we have guaranteed certain obligations of our TRSs.

Note 1. Basis of Presentation

The accompanying condensed consolidated financial statements of Hospitality Properties Trust and its subsidiaries, or HPT, we, our or us, are unaudited. Certain information and disclosures required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements have been condensed or omitted. We believe the disclosures made are adequate to make the information presented not misleading. However, the accompanying condensed consolidated financial statements should be read in conjunction with the financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2017, as amended, or our 2017 Annual Report. In the opinion of management, all adjustments, consisting of normal recurring accruals considered necessary for a fair statement of results for the interim period, have been included. These condensed consolidated financial statements include the accounts of HPT and our subsidiaries, all of which are 100% owned directly or indirectly by HPT. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated. Our operating results for interim periods and those of our managers and tenants are not necessarily indicative of the results that may be expected for the full year. Reclassifications have been made to the prior years’ condensed consolidated financial statements to conform to the current year’s presentation.

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts. Actual results could differ from those estimates. Significant estimates in our condensed consolidated financial statements include the allowance for doubtful accounts, purchase price allocations, useful lives of fixed assets, impairment of real estate and the valuation of intangible assets.

We have determined that each of our wholly owned taxable REIT subsidiaries, or TRSs, is a variable interest entity, or VIE, as defined under the Consolidation Topic of the Financial Accounting Standards Board, or FASB, Accounting Standards Codification™. We have concluded that we must consolidate each of our TRSs because we are the entity with the power to direct the activities that most significantly impact such VIEs’ performance and we have the obligation to absorb losses or the right to receive benefits from each VIE that could be significant to the VIE and are, therefore, the primary beneficiary of each VIE. The assets of our TRSs were $38,962 and $33,305 as of June 30, 2018 and December 31, 2017, respectively, and consist primarily of amounts due from and working capital advances to certain of our hotel managers. The liabilities of our TRSs were $194,649 and $140,897 as of June 30, 2018 and December 31, 2017, respectively, and consist primarily of security deposits they hold and amounts payable to certain of our hotel managers. The assets of our TRSs are available to satisfy our TRSs’ obligations and we have guaranteed certain obligations of our TRSs.