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General - Additional information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 24, 2020
Sep. 30, 2021
Sep. 24, 2020
Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items]          
Depreciation $ 17,714,000 $ 18,698,000 $ 54,147,000 $ 56,584,000  
Proceeds from insurance policy loan 6,700,000   $ 6,700,000    
Interest percentage on insurance loan     8.00%    
Reimbursement towards insurance policy $ 11,400,000        
Percentage Of Cash Dividends     110.00%    
Shares related to the convertible notes were excluded from the computation of diluted earnings per share 9,085,000        
Deferred Revenue $ 37,377,000   $ 37,377,000   $ 37,307,000
Contract assets 0   0   0
Deferred Revenue, Revenue Recognized     8,394,000 12,444,000  
Remaining Performance Obligation Related to Advanced Ticket Sales 4,380,000   4,380,000    
Remaining Performance Obligation Related to Hotels Gift Cards     2,998,000    
Trade names          
Summary of Significant Accounting Policies [Line Items]          
Impairment charge       $ 2,200,000  
Fair Value, Inputs, Level 1 [Member]          
Summary of Significant Accounting Policies [Line Items]          
Trading Securities, Fair Value Disclosure 4,139,000   4,139,000   1,415,000
Fair Value, Inputs, Level 2 [Member]          
Summary of Significant Accounting Policies [Line Items]          
Fair value of the interest rate swaps, liabilities $ 885,000   $ 885,000   $ 1,470,000