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Variable Interest Entity (VIE) - Changes in Noncontrolling Interest for Cercacor (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Oct. 03, 2015
Sep. 27, 2014
Variable Interest Entity [Abstract]        
Noncontrolling Interest Table [Table Text Block]    
 
Nine Months Ended 
 October 3, 2015
Noncontrolling interest, beginning of period
$
1,742

Increase in additional paid-in capital of noncontrolling interest
9

Net loss attributable to noncontrolling interest
2,752

     Noncontrolling interest, end of period
$
(1,001
)
  
Noncontrolling interest, beginning of period     $ 1,742  
Increase in additional paid-in capital of noncontrolling interest     9  
Net loss attributable to noncontrolling interest $ 1,396 $ (1,271) 2,752 $ (1,280)
Noncontrolling interest, end of period $ (1,001)   $ (1,001)