Restructuring and Other Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 13,784
Restructuring and other credits	(1,991)	$ (1,788)
Cash payments	(7,019)
Effect of foreign currency translation	(10)
Ending balance	4,764
Employee Severance and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	13,535
Cash payments	(6,813)
Effect of foreign currency translation	(10)
Ending balance	4,764
Excess Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	249
Cash payments	(206)
Effect of foreign currency translation	0
Ending balance	0
Prior restructuring plans [Member]
Restructuring Cost and Reserve [Line Items]
Ending balance	4,800
Restructuring and other credits	(1,991)
Prior restructuring plans [Member] | Employee Severance and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other credits	(1,948)
Prior restructuring plans [Member] | Excess Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other credits	$ (43)