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Fair Value Measurements of Financial Assets and Liabilities - Narrative (Details) - USD ($)
Jun. 27, 2020
May 31, 2020
Dec. 28, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Aggregate principal amount $ 719,875,000   $ 540,375,000
Finance lease obligations 32,593,000   33,296,000
Convertible senior notes | 2025 Notes      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Aggregate principal amount $ 402,500,000   0
Stated interest rate (percent) 2.50% 2.50%  
Estimated fair value | Level 2 | Convertible senior notes | 2025 Notes      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Estimated fair value of convertible notes $ 464,400,000    
Estimated fair value | Level 2 | Finance lease obligations      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Finance lease obligation $ 36,900,000   $ 38,200,000