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Variable Interest Entity (VIE) (Tables)
3 Months Ended
Apr. 04, 2015
Variable Interest Entity [Abstract]  
Changes in Noncontrolling Interest for Cercacor
 
Three Months Ended 
 April 4, 2015
Noncontrolling interest, beginning of period
$
1,742

Increase in additional paid-in capital of noncontrolling interest
4

Net loss attributable to noncontrolling interest
701

     Noncontrolling interest, end of period
$
1,045