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Segment Reporting (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 01, 2012
Apr. 03, 2011
Dec. 31, 2011
Number of reportable segments 3    
Total assets $ 610,029   $ 869,290
Total sales to distributor 179,678 178,518  
ScanSource Inc. [Member]
     
Percentage of revenues from distributor, minimum 10.00%    
Total sales to distributor $ 30,700 $ 40,600