Schedule of Restructuring, Acquisition and Divestiture Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Restructuring Cost And Reserve [Line Items]
Total restructuring and divestiture charges	$ 163	$ 1,972	$ 200	$ 4,684
Acquisition and related charges	1,418	1,733	2,198	1,979
Total restructuring, acquisition and divestiture related costs	1,581	3,705	2,398	6,663
2016 Restructuring
Restructuring Cost And Reserve [Line Items]
Total restructuring and divestiture charges	153	2,076	186	4,576
2011 Restructuring
Restructuring Cost And Reserve [Line Items]
Total restructuring and divestiture charges	$ 10	$ (104)	$ 14	$ 108

This element represents (i) restructuring charges and benefits, which are amounts charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a program that is planned and controlled by management, and materially changes either the scope of a business undertaken by an entity, or the manner in which that business is conducted; and (ii) acquisition-related costs, which are costs incurred to effect a business combination which costs have been expensed during the period. Such costs can include transaction costs such as banking, legal, accounting and other costs directly related to effect a business combination as well as external, incremental costs of integration planning that are directly related to a business combination, including costs associated with preparing for systems and other integration activities.

No definition available.

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