Annual report pursuant to Section 13 and 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Change in the Components of Accumulated Other Comprehensive Loss, Net of Tax (Details)

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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Change in the Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 26, 2020
Dec. 31, 2020
Jun. 25, 2020
Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax        
Beginning balance $ 233,666 $ 233,666 $ 487,750 $ 484,492
Other comprehensive income (loss) before reclassifications   8,630 (2,286) 25
Adoption of ASU 2018-02       (2,137)
Amounts reclassified from AOCI   (25) 318  
Purchase accounting adjustments to eliminate Predecessor’s accumulated other comprehensive (loss) income 10,027      
Ending balance   308,846 233,666 487,750
Predecessors        
AOCI Attributable to Parent, Net of Tax        
Beginning balance 439,722 439,722    
Ending balance     439,722  
Total Accumulated Other Comprehensive Income (Loss)        
AOCI Attributable to Parent, Net of Tax        
Beginning balance 0 0 (8,059) (5,947)
Ending balance 0 8,605 0 (8,059)
Total Accumulated Other Comprehensive Income (Loss) | Predecessors        
AOCI Attributable to Parent, Net of Tax        
Beginning balance (10,027) (10,027)    
Ending balance     (10,027)  
Net Currency Translation Gains (Losses)        
AOCI Attributable to Parent, Net of Tax        
Beginning balance     2,885 4,428
Other comprehensive income (loss) before reclassifications   7,774 (2,286) (1,543)
Adoption of ASU 2018-02       0
Amounts reclassified from AOCI   0 0  
Purchase accounting adjustments to eliminate Predecessor’s accumulated other comprehensive (loss) income (599)      
Ending balance 0 7,774   2,885
Net Currency Translation Gains (Losses) | Predecessors        
AOCI Attributable to Parent, Net of Tax        
Beginning balance 599 599    
Ending balance     599  
Funded Status of Benefit Plans        
AOCI Attributable to Parent, Net of Tax        
Beginning balance     (10,944) (10,375)
Other comprehensive income (loss) before reclassifications   856 0 1,568
Adoption of ASU 2018-02       (2,137)
Amounts reclassified from AOCI   (25) 318  
Purchase accounting adjustments to eliminate Predecessor’s accumulated other comprehensive (loss) income 10,626      
Ending balance 0 831   $ (10,944)
Funded Status of Benefit Plans | Predecessors        
AOCI Attributable to Parent, Net of Tax        
Beginning balance $ (10,626) $ (10,626)    
Ending balance     $ (10,626)