Restructuring, Acquisition and Divestiture Related Costs - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2016	Apr. 01, 2016	Apr. 03, 2015
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 2,712	$ 1,753
Proceeds from the sale of property, plant and equipment		3,589	23
Facility Closing
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 115
2016 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring plan		During the third quarter of 2015, the Company initiated the 2016 restructuring program, which includes consolidating certain of our manufacturing operations to optimize our facility footprint and better utilize resources, and reducing redundant costs due to productivity cost savings and business volume reductions. We anticipate completing the 2016 restructuring program during the second quarter of 2016. During the three months ended April 1, 2016, the Company incurred restructuring costs of $2.5 million related to the 2016 restructuring plan. Restructuring costs incurred during the three months ended April 1, 2016 of $0.5 million, $1.7 million, $0.1 million and $0.2 million related to the Laser Products, Vision Technologies, Precision Motion and Unallocated Corporate and Shared Services reportable segments, respectively. As of April 1, 2016, the Company incurred cumulative costs related to this restructuring plan totaling $5.6 million. The Company expects to incur additional restructuring charges of $1.0 million to $1.6 million related to the 2016 restructuring plan.
Restructuring Costs		$ 2,500
2016 Restructuring | Cumulative Restructuring Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		5,600
2016 Restructuring | Minimum
Restructuring Cost And Reserve [Line Items]
Additional restructuring costs		1,000
2016 Restructuring | Maximum
Restructuring Cost And Reserve [Line Items]
Additional restructuring costs		1,600
2016 Restructuring | Laser Products
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		500
2016 Restructuring | Vision Technologies
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		1,700
2016 Restructuring | Precision Motion
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		100
2016 Restructuring | Unallocated Corporate and Shared Services
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 200
2015 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring plan		During the first quarter of 2015, the Company initiated a program to eliminate redundant costs, as a result of acquisition and divestiture activities, to better align our operations to our strategic growth plans, to further integrate our business lines, and as a consequence of our productivity initiatives. During the three months ended April 3, 2015, the Company incurred $1.3 million in severance costs related to the 2015 restructuring. Restructuring costs of $0.6 million, $0.4 million, $0.1 million and $0.3 million related to the Laser Products, Vision Technologies, Precision Motion and Unallocated Corporate and Shared Services reportable segments, respectively.
Restructuring Costs			1,370
Severance costs			1,300
2015 Restructuring | Laser Products
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			600
2015 Restructuring | Vision Technologies
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			400
2015 Restructuring | Precision Motion
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			100
2015 Restructuring | Unallocated Corporate and Shared Services
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			300
2011 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring plan		In November 2011, the Company announced a strategic initiative (“2011 restructuring”), which aimed to consolidate operations to reduce the Company’s cost structure and improve operational efficiency. As part of this initiative, the Company eliminated facilities through the consolidation of certain manufacturing, sales and distribution facilities and the exit of Semiconductor and Laser Systems businesses. The Company substantially completed the 2011 restructuring program by the end of 2013. In March 2016, the Company sold our previously exited Laser Systems facility located in Orlando, Florida for a net cash consideration of $3.6 million. Restructuring costs for the three months ended April 1, 2016 included facility costs of $0.2 million related to the Orlando, Florida facility. These costs were recorded in the Unallocated Corporate and Shared Services reportable segment.
Restructuring Costs		$ 212	$ 383
2011 Restructuring | Unallocated Corporate and Shared Services | Facility Closing
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 212
2011 Restructuring | Orlando Facility
Restructuring Cost And Reserve [Line Items]
Proceeds from the sale of property, plant and equipment	$ 3,600