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FAIR VALUE MEASUREMENT Changes in Fair Value of Recurring Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (Details) - Level 3 - Fair Value by Liability Class [Domain]
$ in Thousands
3 Months Ended
Mar. 25, 2016
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Fair value measurement at beginning of period $ 19,300
Contingent consideration liability adjustment recorded for final purchase price valuation (1,000)
Amortization of present value discount 600
Fair value measurement at end of period $ 18,900