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Franchise arrangements - Schedule of Revenues from Franchised Restaurants (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 1,984,219 | $ 2,959,077 | $ 3,081,571
Revenues from franchised restaurants |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 89,601 | 146,790 | 148,962
Rent |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 89,123 | 145,860 | 148,094
Sublease Income | 74,723 | 114,459 |
Initial fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 203 | 287 | 195
Initial fees paid to McDonald's Corporation | 493 | 1,456 | 1,323
Royalty fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 275 | 643 | 673
Royalty fees paid to McDonald's Corporation | $ 36,554 | $ 57,709 | $ 57,733

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