Restructuring and Other Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Restructuring Cost and Reserve [Line Items]
Beginning balance			$ 24,460
Restructuring and other charges, net	$ (929)	$ (74)	(2,717)	$ 14,512
Cash payments			(15,298)
Effect of foreign currency translation			233
Ending balance	6,678		6,678
Employee Severance and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance			24,402
Cash payments			(15,157)
Effect of foreign currency translation			236
Ending balance	6,678		6,678
Excess Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance			58
Cash payments			(141)
Effect of foreign currency translation			(3)
Ending balance	0		0
2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net			(2,771)
Ending balance	$ 6,700		6,700
2016 Restructuring Plan [Member] | Employee Severance and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net			(2,805)
2016 Restructuring Plan [Member] | Excess Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net			34
Prior restructuring plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net			54
Prior restructuring plans [Member] | Employee Severance and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net			2
Prior restructuring plans [Member] | Excess Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net			$ 52