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SHAREHOLDERS' EQUITY (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 26, 2021
Sep. 27, 2020
Sep. 26, 2021
Sep. 27, 2020
Dec. 27, 2020
Dec. 29, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (in shares)     35,493      
Ending balance (in shares) 35,455   35,455      
Beginning balance     $ 437,190      
Net income (loss) $ 18,642 $ 8,795 41,424 $ (149,867)    
Change in accounting standard cumulative-effect adjustment 501,309   501,309   $ 452,017  
Foreign currency translation adjustment (1,296) 386 (806) (4,141)    
Ending balance, net of tax $ 485,676 $ 424,182 $ 485,676 $ 424,182    
Common stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (in shares) 35,510 36,052 35,493 38,593    
Purchases and retirement of common stock (in shares) 0 627 0 3,557    
Net issuances under equity plans, including tax benefits (in shares) (55) 48 (72) 387    
Stock-based compensation (in shares) 0 (23) 34 27    
Ending balance (in shares) 35,455 35,450 35,455 35,450    
Beginning balance $ 1 $ 1 $ 1 $ 1    
Ending balance, net of tax 1 1 1 1    
Retained earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 479,567 430,525 452,017 639,210    
Net income (loss) 18,642 8,795 41,424 (149,867)    
Purchases and retirement of common stock 0 0 0 (52,346)    
Net issuance under equity plans, including tax benefits (133) (177) (2,281) (1,597)    
Stock-based compensation 3,233 2,417 10,149 6,762    
Ending balance, net of tax 501,309 441,560 501,309 441,560    
Retained earnings | Cumulative-effect adjustment            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Change in accounting standard cumulative-effect adjustment           $ (602)
Accumulated other comprehensive loss            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (14,338) (17,765) (14,828) (13,238)    
Foreign currency translation adjustment (1,296) 386 (806) (4,141)    
Ending balance, net of tax $ (15,634) $ (17,379) $ (15,634) $ (17,379)