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Relationships with Managers and Franchisors - Schedule of Management Fees (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Capitalized Contract Cost [Line Items] |  |  |
Base management fees | $ 20,467 | $ 22,265 | $ 24,480
Incentive management fees | 5,805 | 6,259 | 7,810
Amortization of deferred income related to key money | (2,398) | (4,840) | (432)
Amortization of unfavorable contract liabilities | (1,715) | (1,715) | (1,715)
Management fees |  |  |
Capitalized Contract Cost [Line Items] |  |  |
Operating expenses | $ 22,159 | $ 21,969 | $ 30,143

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