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Accrued Expenses And Other Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 26, 2014
Dec. 27, 2013
Accrued Expenses And Other Liabilities [Abstract]    
Accrued compensation and benefits $ 5,642 $ 5,163
Accrued bonuses 4,652 5,899
Accrued restructuring related expenses 750 134
Deferred revenue 7,949 8,345
Accrued sales, use, franchise and VAT tax 2,308 1,393
Acquisition-related contingent consideration 8,000  
Other accrued expenses 4,342 4,712
Total accrued expenses and other liabilities $ 33,643 $ 25,646