Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Measurement of Assets and Liabilities at Fair Value on Recurring Basis (Details)

v3.20.2
Fair Value Measurements - Measurement of Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Dec. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Combination, Contingent Consideration, Liability $ (18,418)   $ (18,100)
Change in fair value of contingent consideration (1,300) $ 0  
Resharp      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Change in fair value of contingent consideration (1,300)    
Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Combination, Contingent Consideration, Liability 0   0
Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Combination, Contingent Consideration, Liability 0   0
Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Combination, Contingent Consideration, Liability (18,418)   (18,100)
Fair Value Measurements, Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading securities 1,609   1,911
Fair Value Measurements, Recurring | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading securities 1,609   1,911
Fair Value Measurements, Recurring | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading securities 0   0
Fair Value Measurements, Recurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading securities 0   0
Interest rate swaps | Fair Value Measurements, Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability (4,762)   (3,592)
Interest rate swaps | Fair Value Measurements, Recurring | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0   0
Interest rate swaps | Fair Value Measurements, Recurring | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability (4,762)   (3,592)
Interest rate swaps | Fair Value Measurements, Recurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0   0
Other Current Liabilities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Combination, Contingent Consideration, Liability, Current 2,035   2,275
Other Noncurrent Liabilities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business Combination, Contingent Consideration, Liability, Noncurrent $ 16,383   $ 15,825