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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2017
Dec. 25, 2015
Dec. 26, 2014
Dec. 01, 2015
Business Acquisition [Line Items]        
Property, plant and equipment on account that was not yet paid $ 1,500 $ 300 $ 1,000  
Contingent consideration 21,600 0    
Business combination, provisional information, initial accounting incomplete, adjustment, consideration transferred 3,800      
Cash paid during the period for:        
Interest 4,083 3,504 2,483  
Income taxes 10,312 34,401 $ 9,140  
SIMOS Insourcing Solutions Corporation        
Business Acquisition [Line Items]        
Contingent consideration       $ 18,300
SIMOS Insourcing Solutions Corporation | Significant Unobservable Inputs (Level 3)        
Business Acquisition [Line Items]        
Contingent consideration 21,600 19,300    
Total Fair Value | SIMOS Insourcing Solutions Corporation        
Business Acquisition [Line Items]        
Contingent consideration $ 21,600 $ 19,300    
Total Fair Value | Contingent Consideration [Member] | SIMOS Insourcing Solutions Corporation | Significant Unobservable Inputs (Level 3)        
Business Acquisition [Line Items]        
Fair value measurement at beginning of period       $ 19,300