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Leases (Schedule of Details of Rent Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lessee, Lease, Description [Line Items]      
Operating lease expense - Minimum rentals $ (146,577) $ (143,938) $ (147,815)
Variable lease expense - Contingent rentals based on sales (42,440) (48,516) (64,720)
Total lease expense (189,017) (192,454) (212,535)
General and administrative expenses      
Lessee, Lease, Description [Line Items]      
Operating lease expense - Minimum rentals (7,614) (7,610) (9,319)
Company-operated restaurants | Occupancy and other operating expenses      
Lessee, Lease, Description [Line Items]      
Operating lease expense - Minimum rentals (104,236) (105,358) (107,006)
Variable lease expense - Contingent rentals based on sales (29,562) (33,921) (41,499)
Franchised restaurants | Franchised restaurants - occupancy expenses      
Lessee, Lease, Description [Line Items]      
Operating lease expense - Minimum rentals (34,727) (30,970) (31,490)
Variable lease expense - Contingent rentals based on sales $ (12,878) $ (14,595) $ (23,221)