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General - Additional information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 24, 2020
Sep. 26, 2019
Sep. 24, 2020
Sep. 26, 2019
Dec. 26, 2019
Summary of Significant Accounting Policies [Line Items]          
Depreciation $ 18,698,000 $ 19,194,000 $ 56,584,000 $ 53,433,000  
Percentage Of Cash Dividends     110.00%    
Deferred Revenue 36,347,000   $ 36,347,000   $ 43,200,000
Contract assets 0   0   0
Deferred Revenue, Revenue Recognized     12,444,000    
Remaining Performance Obligation Related to Advanced Ticket Sales 4,631,000   4,631,000    
Remaining Performance Obligation Related to Hotels Gift Cards     2,679,000    
Fair Value, Inputs, Level 1 [Member]          
Summary of Significant Accounting Policies [Line Items]          
Trading Securities, Fair Value Disclosure 1,059,000   1,059,000   5,825,000
Fair Value, Inputs, Level 2 [Member]          
Summary of Significant Accounting Policies [Line Items]          
Interest Rate Fair Value Hedge Liability at Fair Value $ 1,890,000   $ 1,890,000   $ 1,194,000