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Fair Value Measurements Fair Value Measurements (Details) - USD ($)
Jun. 24, 2018
Sep. 24, 2017
Mar. 26, 2017
Mar. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt, Long-term and Short-term, Combined Amount $ 499,812,000 $ 548,385,000    
Warrant liability fair value 1,456,000   $ 1,051,000 $ 16,930,000
1st Lien Agreement [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term Debt, Fair Value 14,395,000      
Senior Notes [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term Debt, Fair Value 401,003,000      
Debt, Long-term and Short-term, Combined Amount 385,000,000 385,000,000    
New Second Lien Loan [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt, Long-term and Short-term, Combined Amount 100,417,000 $ 118,240,000    
2nd Lien Agreement [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term Debt, Fair Value $ 102,927,000