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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 25, 2015
Dec. 26, 2014
Dec. 27, 2013
Operating Loss Carryforwards [Line Items]      
Effective Income Tax Rate Reconciliation, Percent 26.10% 19.80% 26.30%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount $ 4,800 $ 8,700  
Foreign Income Tax Expense (Benefit), Continuing Operations 7,100 3,100 $ 1,300
Undistributed Earnings of Foreign Subsidiaries 13,200    
Unrecognized Tax Benefits 2,039 $ 2,035 $ 1,884
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 1,400    
Unrecognized Tax Benefits, Income Tax Penalties Accrued 200    
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 800    
Staffing Solutions Holdings, Inc. (Seaton) [Member]      
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Tax Credit Carryforwards, Acquisition $ 5,000