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Long-term Debt - 2025 Notes Narrative (Details)
$ / shares in Units, common_share in Millions
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 53 Months Ended 58 Months Ended
Sep. 26, 2020
USD ($)
$ / shares
May 12, 2020
USD ($)
May 31, 2020
USD ($)
common_share
$ / shares
Sep. 26, 2020
USD ($)
$ / shares
Sep. 26, 2020
USD ($)
$ / shares
Sep. 28, 2019
USD ($)
Dec. 28, 2019
USD ($)
Feb. 14, 2025
day
Feb. 14, 2025
USD ($)
day
Debt Instrument [Line Items]                  
Amortization of debt discount and deferred financing costs         $ 7,248,000 $ 1,071,000      
Convertible senior notes | 2025 Notes                  
Debt Instrument [Line Items]                  
Stated interest rate (percent) 2.50%   2.50% 2.50% 2.50%        
Proceeds from convertible debt     $ 390,900,000            
Debt issuance costs     11,600,000            
Principal amount per note     $ 1,000            
Conversion ratio     32.0783            
Conversion price (in usd per share) | $ / shares $ 31.17   $ 31.17 $ 31.17 $ 31.17        
Number of shares of common stock reserved for conversion of debt | common_share     12.9            
If-converted value in excess of principal amount $ 73,300,000                
Post-tax conversion option recorded to equity     $ 73,500,000            
Pre-tax conversion option recorded to equity     $ 95,200,000            
Effective interest rate (percent)     9.09%            
Amortization of debt discount and deferred financing costs       $ 6,800,000 $ 10,400,000        
Unamortized debt discount remaining period (in years) 5 years                
Convertible senior notes | 2025 Notes | Maximum                  
Debt Instrument [Line Items]                  
Number of shares of common stock reserved for conversion of debt | common_share     16.5            
Convertible senior notes | 2025 Notes | Equity component                  
Debt Instrument [Line Items]                  
Debt issuance costs     $ 2,700,000            
Post-tax debt issuance costs     2,200,000            
Convertible senior notes | 2025 Notes | Debt component                  
Debt Instrument [Line Items]                  
Debt issuance costs     $ 8,900,000            
Convertible senior notes | 2025 Notes | Forecast                  
Debt Instrument [Line Items]                  
Threshold stock price trigger (percent)               130.00%  
Threshold trading days for conversion price metric | day               20  
Threshold consecutive trading days for conversion price measurement | day               30  
Threshold consecutive business days after measurement period | day                 5
Threshold consecutive trading days for measurement period | day                 10
Principal amount per note                 $ 1,000
Trading price compared to factor of last reported sale price by conversion rate (percent)                 98.00%
Credit facility | Revolving credit facility, due July 18, 2024                  
Debt Instrument [Line Items]                  
Repayment of revolving credit facility   $ 294,300,000              
Term loan | Term loan, due July 18, 2024                  
Debt Instrument [Line Items]                  
Repayment of term loan   $ 75,000,000.0         $ 25,000,000.0