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Restructuring, Acquisition and Divestiture Related Costs - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 29, 2018
Jun. 30, 2017
Jun. 29, 2018
Jun. 30, 2017
Restructuring and Acquisition Related Costs [Line Items]        
Restructuring Costs $ 988 $ 163 $ 988 $ 200
Acquisition and related charges 1,451 1,418 1,476 2,198
Finders' Fees, Legal, Valuation And Other Professional Or Consulting Fees        
Restructuring and Acquisition Related Costs [Line Items]        
Acquisition and related charges   1,400   2,200
Precision Motion | Finders' Fees, Legal, Valuation And Other Professional Or Consulting Fees        
Restructuring and Acquisition Related Costs [Line Items]        
Acquisition and related charges 300   300  
Precision Motion | Earn-out Agreement        
Restructuring and Acquisition Related Costs [Line Items]        
Acquisition and related charges 1,100   $ 1,100  
2018 Restructuring        
Restructuring and Acquisition Related Costs [Line Items]        
Restructuring plan     During the second quarter of 2018, the Company initiated a program to integrate manufacturing operations as a result of recent acquisition activities. During the three months ended June 29, 2018, the Company recorded $1.0 million in severance and related costs in connection with the 2018 restructuring plan. These costs were reported in the Vision reportable segment.  
Restructuring Costs 988   $ 988  
2018 Restructuring | Vision        
Restructuring and Acquisition Related Costs [Line Items]        
Severance and related costs $ 1,000      
2016 Restructuring        
Restructuring and Acquisition Related Costs [Line Items]        
Restructuring plan     During the third quarter of 2015, the Company initiated the 2016 restructuring program, which included consolidating certain manufacturing operations to optimize its facility footprint and better utilize resources, and reducing redundant costs due to productivity cost savings and business volume reductions. As of June 29, 2018, the Company incurred cumulative costs related to this restructuring plan totaling $6.5 million. The plan was completed in 2017.  
Restructuring Costs   $ 153   $ 186
2016 Restructuring | Cumulative Restructuring Costs        
Restructuring and Acquisition Related Costs [Line Items]        
Restructuring Costs     $ 6,500