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Description of the Business and Summary of Significant Accounting Policies - Deferred Management Rights Proceeds (Details) | 12 Months Ended
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Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Term of management rights for income amortization | 65 years

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- Definition Number of years, including renewal options, of management agreement. The amount of purchase price allocated to management rights was deferred and is amortized on a straight-line basis over this period. + References No definition available. + Details
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