Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Narrative (Details)

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Fair Value Measurements - Narrative (Details) - USD ($)
Dec. 29, 2018
Sep. 29, 2018
Dec. 30, 2017
Dec. 14, 2017
Nov. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying value of senior subordinated notes $ 692,449,000 $ 692,153,000 $ 691,336,000    
Senior notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying value of senior subordinated notes $ 691,892,000 691,575,000 690,839,000    
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 $ 273,600,000 285,500,000 $ 300,800,000    
Carrying value of senior subordinated notes 295,700,000 295,600,000 295,500,000    
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 402,000,000 414,400,000 424,200,000    
Carrying value of senior subordinated notes $ 396,200,000 $ 396,000,000 $ 395,400,000