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Acquisitions and Intangible Assets (Details Textuals) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 02, 2011
Jul. 03, 2010
Jul. 02, 2011
Jul. 03, 2010
Jan. 01, 2011
Additional Acquisitions and Intangible Assets (Textuals) [Abstract]          
Aggregate cash price of acquisition $ 4,168   $ 4,168    
Acquisitions and Intangible Assets (Textuals) [Abstract]          
Initial cash payment for entity acquired 1,066   1,066    
Maximum earn-out to be paid over four years 5,000   5,000    
Hold-back amount to be released upon settlement of certain closing matters 1,040   1,040    
Estimated fair value of payout 2,062   2,062    
Aggregate cash price of acquisition 4,168   4,168    
Identifiable intangible assets 4,142   4,142    
Gross carrying amounts of finite-lived identifiable intangible assets 185,150   185,150   179,267
Maximum amortization period for finite-lived identifiable intangible assets     17    
Net carrying amounts of finite-lived identifiable intangible assets 81,177   81,177   81,992
Amortization expenses 3,250 4,303 6,455 8,646  
Maximum potential earn-out four years through December 31, 2014        
Customer Relationships [Member]
         
Additional Acquisitions and Intangible Assets (Textuals) [Abstract]          
Estimated useful lives of Identifiable intangible assets in years     10    
Albora Soluciones and Asiasoft Hong Kong Limited [Member]
         
Additional Acquisitions and Intangible Assets (Textuals) [Abstract]          
Estimated useful lives of Identifiable intangible assets in years   10      
Aggregate cash price of acquisition   4,933   4,933  
Identifiable intangible assets   2,921   2,921  
Deferred tax liabilities   779   779  
Acquisitions and Intangible Assets (Textuals) [Abstract]          
Aggregate cash price of acquisition   $ 4,933   $ 4,933