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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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