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EARNINGS PER SHARE - Antidilutive Securities (Details) - Common Stock [Member] - shares
3 Months Ended
Mar. 31, 2021
Mar. 25, 2020
Stock options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares (in shares) 1,698 847,207
Performance stock units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares (in shares) 51,974 179,253
Restricted stock units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares (in shares) 0 264,431
Shares of Class B common stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares (in shares) 0 3,117,002