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COMMITMENTS AND CONTINGENCIES Operating Leases (Details) (USD $)
 12 Months Ended
Dec. 26, 2014
Dec. 27, 2013
Dec. 28, 2012
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]      
2015 $ 4,417,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent    
2016 3,403,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears    
2017 2,940,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears    
2018 2,655,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears    
2019 2,459,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears    
Thereafter 3,573,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter    
Total future non-cancelable minimum lease payments 19,447,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue    
Operating leases narrative [Abstract]      
Maximum period afforded to each party to cancel lease agreements 90 days    
Cancellation provision in effect for leases excluded from amounts, maximum period 90 days    
Rent expense $ 23,000,000us-gaap_OperatingLeasesRentExpenseNet $ 22,500,000us-gaap_OperatingLeasesRentExpenseNet $ 22,000,000us-gaap_OperatingLeasesRentExpenseNet
Minimum      
Operating leases narrative [Abstract]      
Operating leases renewal option period 3 years    
Maximum      
Operating leases narrative [Abstract]      
Operating leases renewal option period 5 years