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Financial Instruments and Fair Value Measurements - Interest Rate Swaps (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 29, 2019
Feb. 28, 2017
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Jun. 29, 2020
Dec. 31, 2019
Mar. 19, 2019
Feb. 07, 2017
Derivative [Line Items]                    
Balance of accumulated other comprehensive loss related to interest rate swaps expected to be reclassified during next twelve months     $ 7,100,000   $ 7,100,000          
Change in fair value of interest rate swap     1,800,000 $ (2,000,000.0) (9,300,000) $ (12,600,000)        
Net interest expense (income)     1,800,000 (200,000) 3,700,000 (1,000,000.0)        
Revolving credit facility | Fourth Amendment To Senior Secured Credit Facility                    
Derivative [Line Items]                    
LIBOR interest rate floor             0.75%      
Interest Rate Swap                    
Derivative [Line Items]                    
Term 5 years 5 years                
Derivative, Notional Amount                 $ 130,000,000.0 $ 250,000,000.0
Fixed swap rate                 2.43% 1.89%
Cash flow hedge ineffectiveness recorded in earnings         0          
Prepaid Expenses and Other Current Assets | Interest Rate Swap                    
Derivative [Line Items]                    
Interest rate swap assets     0   0     $ 0    
Other Long Term Liabilities | Interest Rate Swap                    
Derivative [Line Items]                    
Interest rate swap liabilities     (16,200,000)   (16,200,000)     $ (6,400,000)    
Interest Expense | Interest Rate Swap                    
Derivative [Line Items]                    
Interest income (expense) on interest rate swap     1,800,000 (200,000) 3,700,000 (1,000,000.0)        
Loss recognized in interest expense excluded from hedge effectiveness assessments     (1,400,000) 0 (1,300,000) 0        
Amounts reclassified out of accumulated other comprehensive loss to interest expense     1,800,000 0 1,800,000 0        
Net interest expense (income)     2,200,000 (200,000) 4,200,000 (1,000,000.0)        
Other Comprehensive Income (Loss) | Interest Rate Swap                    
Derivative [Line Items]                    
Change in fair value of interest rate swap     $ 0 $ 2,000,000.0 $ 11,100,000 $ 12,600,000