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Business Acquisitions - ChanTest, Additional Information (Details) - USD ($)
 6 Months Ended
Oct. 29, 2014
Jun. 27, 2015
Jun. 28, 2014
Business Acquisition [Line Items]      
Total purchase price allocation   $ 10,680,000 $ 183,151,000
ChanTest      
Business Acquisition [Line Items]      
Preliminary purchase price $ 59,300,000    
Contingent consideration 300,000    
Maximum contingent consideration limit 2,000,000    
Total purchase price allocation 52,073,000    
Total purchase price allocation $ 7,200,000    
Price allocation adjustment period, maximum 1 year