Business Overview and Significant Accounting Policies (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 01, 2018 USD ($) Country facility	Apr. 02, 2017 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other expense (income), net	$ 272	$ 514
Selling, general and administration expenses	$ 68,211	65,110
Number of manufacturing locations | facility	65
Number of countries | Country	8
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other expense (income), net		(300)	$ (1,100)	$ (500)
Selling, general and administration expenses		$ 300	$ 1,100	$ 500