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Acquisitions (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Oct. 03, 2015
Dec. 31, 2014
Business Acquisition [Line Items]    
Goodwill $ 352,151 $ 354,838
Weighted-average useful life of acquired intangible assets 8 years 8 years
Pro forma effect of business acquisitions

The impact of the acquisition of ElectroForce on the Company's revenues and net income since the acquisition date for the nine months ended October 3, 2015 was immaterial.

  
Acquisitions in 2015 [Member]    
Business Acquisition [Line Items]    
Accounts receivable and other current assets acquired $ 1,520  
Inventory acquired 4,489  
Property, plant and equipment acquired 699  
Intangible assets acquired 3,700  
Goodwill 1,118  
Total assets acquired 11,526  
Accrued expenses and other current liabilities acquired 2,118  
Cash consideration paid $ 9,408  
Acquisitions in 2015 [Member] | Unpatented Technology [Member]    
Business Acquisition [Line Items]    
Weighted-average useful life of acquired intangible assets 10 years  
Acquisitions in 2015 [Member] | Customer Relationships [Member]    
Business Acquisition [Line Items]    
Weighted-average useful life of acquired intangible assets 5 years