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Description of Business and Summary of Significant Accounting Policies - Acquisitions and Investments - Additional Information (Detail) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2014 USD ($) Room | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Business Acquisition [Line Items] |  |  |  |
Total Debt | $ 1,591,392 |  | $ 1,502,554 |
AC Hotel Note Payable [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total Debt |  | $ 6,000 |  | $ 6,000
Aloft Hotel National Harbor [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of room purchased | Room |  | 192 |  |
Purchase price of hotel |  | $ 21,800 |  |
Hotel opened date | 2015-04 |  |  |

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