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Fair Value Measurements Fair Value Measurements (Details) - USD ($)
Dec. 24, 2017
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 $ 531,953,000 $ 548,385,000    
Warrant liability fair value 1,580,000   $ 2,011,000 $ 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 33,895,000      
Senior Notes [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term Debt, Fair Value 397,994,000      
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 113,058,000 $ 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 $ 116,450,000