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Long-Term Obligations - Narrative (Details)
6 Months Ended 9 Months Ended 21 Months Ended
Jun. 29, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 29, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]              
Long-term debt   $ 1,293,717,000         $ 1,264,333,000
Payment of financing costs   $ 0 $ 3,829,000        
Voting equity guarantee on indebtedness, percentage   65.00%          
Non-voting equity guarantee on indebtedness, percentage   100.00%          
Revolving credit              
Debt Instrument [Line Items]              
Long-term debt   $ 436,362,000         395,907,000
Financing costs   3,638,000         4,093,000
Principal amount   440,000,000         400,000,000
Senior term notes              
Debt Instrument [Line Items]              
Long-term debt   855,707,000         866,395,000
Financing costs   2,293,000         2,605,000
Principal amount   $ 858,000,000         $ 869,000,000
Senior term notes | Eurodollar rate              
Debt Instrument [Line Items]              
Basis spread on variable rate   1.00%          
Senior term notes | Federal funds rate              
Debt Instrument [Line Items]              
Basis spread on variable rate   0.50%          
Senior term notes | Forecast              
Debt Instrument [Line Items]              
Principal payment (quarterly)       $ 22,000,000 $ 16,500,000 $ 11,000,000  
New Senior Credit Facility | Base rate | Tier Three              
Debt Instrument [Line Items]              
Applicable margin   0.50%          
New Senior Credit Facility | Eurodollar rate | Tier Three              
Debt Instrument [Line Items]              
Applicable margin   1.50%          
New Senior Credit Facility | Secured debt              
Debt Instrument [Line Items]              
Payment of financing costs $ 3,800,000            
Financing costs 3,200,000            
Deferred financing costs recognized as part of net income 600,000            
New Senior Credit Facility | Secured debt | Bridge Loan              
Debt Instrument [Line Items]              
Maximum borrowing capacity 25,000,000            
New Senior Credit Facility | Line of credit              
Debt Instrument [Line Items]              
Interest coverage ratio   14.75          
Required interest coverage ratio (no less than)   3          
Leverage ratio   2.59          
Required leverage ratio (no more than)   3.75          
New Senior Credit Facility | Line of credit | Secured debt              
Debt Instrument [Line Items]              
Maximum borrowing capacity 1,700,000,000            
New Senior Credit Facility | Senior term notes | Secured debt              
Debt Instrument [Line Items]              
Debt instrument face amount 880,000,000            
New Senior Credit Facility | Revolving credit              
Debt Instrument [Line Items]              
Long-term debt     $ 375,000,000        
New Senior Credit Facility | Revolving credit | Secured debt              
Debt Instrument [Line Items]              
Maximum borrowing capacity 800,000,000            
Credit Agreement | Secured debt              
Debt Instrument [Line Items]              
Capitalized deferred financing costs expensed 1,000,000            
Credit Agreement | Senior term notes | Secured debt              
Debt Instrument [Line Items]              
Maximum borrowing capacity 600,000,000            
Credit Agreement | Revolving credit | Secured debt              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 800,000,000