Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Narrative (Details)

v3.20.4
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
Jan. 02, 2021
USD ($)
shares
Sep. 26, 2020
USD ($)
Dec. 28, 2019
USD ($)
Jan. 02, 2021
USD ($)
$ / shares
shares
Dec. 28, 2019
USD ($)
$ / shares
Dec. 29, 2018
USD ($)
May 20, 2019
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     5,100,000     5,100,000      
Shares issued in period (in shares) | shares   2,400,000              
Stock-based compensation           $ 15,948,000 $ 23,844,000 $ 14,894,000  
Total unrecognized compensation cost related to nonvested stock-based compensation     $ 18,900,000     $ 18,900,000      
Period for recognition           1 year 2 months 23 days      
Shares paid for tax withholding for share based compensation (in shares) | shares           102,300      
Share based compensation vesting period           3 years      
Award expiration period from grant date           10 years      
Total fair value of stock option vested         $ 300,000 $ 7,000,000.0      
Total intrinsic value of stock options exercised         2,000,000.0 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     4,000,000.0  
Stock-based compensation expense | Employees                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation         $ 7,300,000     $ 10,900,000  
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           $ 16.63 $ 32.52    
Total market value of awards outstanding     $ 25,700,000     $ 25,700,000      
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     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     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 2 years    
Percentage adjustment     25.00%     25.00%      
Total shareholder return adjustment | $ / shares           $ (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           $ 16.44 $ 32.27    
Total market value of awards outstanding     $ 32,200,000     $ 32,200,000      
Performance-based | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share payout (in shares) | shares     0     0      
Performance-based | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share payout (in shares) | shares     2     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     $ 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     $ 5,200,000     $ 5,200,000      
Market value of shares vested           $ 1,700,000 $ 2,600,000    
Restricted stock | Management                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share based compensation vesting period           5 years