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Fair Value Measurements (Details) - Nonrecurring - Level 2 - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 30, 2017
Reported Value Measurement [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior Secured Term Loan Facility $ 97,500 $ 64,750
Senior Secured Revolving Credit Facility 122,608 69,000
Estimate of Fair Value Measurement [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior Secured Term Loan Facility 97,500 64,750
Senior Secured Revolving Credit Facility $ 122,608 $ 69,000