Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Narrative (Details)

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Fair Value Measurements - Narrative (Details) - USD ($)
9 Months Ended
Jun. 29, 2019
Sep. 29, 2018
Jun. 30, 2018
Dec. 30, 2017
Dec. 14, 2017
Nov. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Indefinite-lived intangible assets, carrying value $ 2,500,000          
Indefinite-lived intangible assets, impairment charge 2,500,000          
Carrying value of senior subordinated notes 693,064,000 $ 692,153,000 $ 691,860,000      
Senior notes            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Carrying value of senior subordinated notes $ 692,525,000 691,575,000 691,259,000      
Senior notes | Senior notes, interest at 5.125%, payable semi-annually, principal due February 2028            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt, aggregate principal amount       $ 300,000,000    
Debt instrument interest rate stated, percentage 5.125%     5.125% 5.125%  
Estimated fair value of senior notes $ 295,000,000.0 285,500,000 278,700,000      
Carrying value of senior subordinated notes 296,000,000 295,600,000 295,500,000      
Senior notes | 6.125% senior notes due in November 2023            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt, aggregate principal amount           $ 400,000,000
Debt instrument interest rate stated, percentage           6.125%
Estimated fair value of senior notes 415,800,000 414,400,000 414,500,000      
Carrying value of senior subordinated notes $ 396,500,000 $ 396,000,000.0 $ 395,800,000