Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTAION AND SIGNIFICANT ACCOUNTING POLICIES - Recently Adopted Accounting Pronouncements (Details)

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BASIS OF PRESENTAION AND SIGNIFICANT ACCOUNTING POLICIES - Recently Adopted Accounting Pronouncements (Details) - USD ($)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 25, 2020
May 31, 2020
Jun. 25, 2020
Mar. 31, 2020
Jun. 30, 2019
Jun. 25, 2020
Jun. 30, 2019
Dec. 31, 2019
Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Operating profit $ (317)     $ (4,859)   $ 5,945 $ (38,181) $ 16,326    
Accumulated other comprehensive income $ 15                  
Net parent investment                 $ 487,750  
ASU 2017-07 | Restatement adjustment                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Operating profit   $ 100 $ 100   $ 100          
ASU 2018-02 | Restatement adjustment                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Accumulated other comprehensive income                   $ (2,100)
Net parent investment                   $ 2,100