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FAIR VALUE MEASUREMENTS (Schedule of Fair Value and Carrying Amount of Debt Obligations) (Details)
$ in Thousands
Mar. 28, 2021
USD ($)
Dec. 27, 2020
USD ($)
Sep. 29, 2017
Cost of Capital | Valuation Technique, Discounted Cash Flow      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt measurement input 0.005 0.005  
Senior notes | Fixed-rate senior notes payable at 5.75%, at Level 2 inputs      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Stated interest rate 5.75%    
Senior notes | Fixed-rate senior notes payable at 5.875%, at Level 2 inputs      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Stated interest rate 5.875%   5.875%
Senior notes | Level 1 | Carrying Amount | Fixed-rate senior notes payable at 5.75%, at Level 2 inputs      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt $ (1,001,592) $ (1,001,693)  
Senior notes | Level 1 | Carrying Amount | Fixed-rate senior notes payable at 5.875%, at Level 2 inputs      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt (845,329) (845,149)  
Senior notes | Level 1 | Fair Value | Fixed-rate senior notes payable at 5.75%, at Level 2 inputs      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt (1,021,700) (1,024,510)  
Senior notes | Level 1 | Fair Value | Fixed-rate senior notes payable at 5.875%, at Level 2 inputs      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt (901,000) (911,957)  
Secured loans | Level 3 | Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt (32) (38)  
Secured loans | Level 3 | Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt $ (32) $ (38)