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Revenues - Components of Lease Income (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2021
Sep. 23, 2020
Sep. 29, 2021
Sep. 23, 2020
Revenue from Contract with Customer [Abstract]        
Operating lease revenue $ 7,594 $ 8,277 $ 23,175 $ 24,959
Variable lease revenue 2,737 1,805 8,180 6,193
Total occupancy revenue $ 10,331 $ 10,082 $ 31,355 $ 31,152