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Summary of Significant Accounting Policies - Revenue (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Trade receivables | $ 27,435 | $ 17,919
Advance deposits as deferred revenue | 11,937 | 14,307
Due To Hotel Managers |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Advance deposits as deferred revenue | $ 13,336 | $ 14,754

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