Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Narrative (Details)

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STOCK-BASED COMPENSATION - Narrative (Details)
3 Months Ended 7 Months Ended 12 Months Ended
Dec. 15, 2020
USD ($)
employee
$ / shares
shares
May 23, 2019
shares
Sep. 26, 2020
USD ($)
Dec. 28, 2019
USD ($)
Jan. 01, 2022
USD ($)
$ / shares
shares
Jan. 02, 2021
USD ($)
$ / shares
Dec. 28, 2019
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Maximum number of shares authorized (in shares) | shares         7,500,000    
Shares available for future grant (in shares) | shares         4,400,000    
Shares issued in period (in shares) | shares   2,400,000          
Stock-based compensation         $ 38,516,000 $ 15,948,000 $ 23,844,000
Total unrecognized compensation cost related to nonvested stock-based compensation         $ 15,200,000    
Period for recognition         1 year 3 months 21 days    
Shares paid for tax withholding for share based compensation (in shares) | shares         139,750    
Share based compensation vesting period         3 years    
Award expiration period from grant date         10 years    
Total fair value of stock option vested         $ 3,500,000 7,000,000  
Total intrinsic value of stock options exercised         5,500,000 3,100,000  
Inventories              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation         $ 0 $ 0 $ 0
Former Parent              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation       $ 2,200,000      
Stock-based compensation expense | Employees              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation       $ 7,300,000      
Time-based              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Grant date fair value of each restricted units granted (in USD per share) | $ / shares         $ 49.68 $ 16.63  
Total market value of awards outstanding         $ 28,900,000    
Time-based | Employees              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares of common stock to be issued for each restricted stock unit granted (in shares) | shares         1    
Share based compensation vesting period         3 years    
Time-based | Nonemployees | Director              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation vesting period         1 year    
Share payout (in shares) | shares         1    
Performance-based              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation     $ (2,200,000)        
Performance period, years         3 years 3 years 2 years
Percentage adjustment         25.00%    
Total shareholder return adjustment | $ / shares         $ 5.73 $ 0.00 $ (0.67)
Share-based payment arrangement, plan modification, shares affected (in shares) | shares 270,000            
Share-based payment arrangement, plan modification, number of employees affected | employee 200            
Grant date fair value of each restricted units granted (in USD per share) | $ / shares         $ 49.70 $ 16.44  
Total market value of awards outstanding         $ 45,400,000    
Performance-based | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share payout (in shares) | shares         0    
Performance-based | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share payout (in shares) | shares         2    
Performance-based | Tranche One              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance period, years         2 years    
Performance-based | Tranche Two              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance period, years         3 years    
Modified performance-based awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation         $ 4,100,000 $ 2,900,000  
Modified awards, fair value (in USD per share) | $ / shares $ 42.99            
Plan modification, incremental cost $ 8,800,000            
Restricted stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Fair value of restricted stock         100,000    
Market value of shares vested         $ 5,600,000 $ 1,700,000  
Restricted stock | Management              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation vesting period         5 years