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Restructuring and Other Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Restructuring Reserve [Roll Forward]
Beginning balance			$ 9,638
Restructuring and other credits	$ (275)	$ (313)	(1,342)	$ (1,002)
Cash payments			(6,995)
Effect of foreign currency translation			(83)
Ending balance	1,218		1,218
Employee Severance and Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			9,229
Restructuring and other credits			(1,280)
Cash payments			(6,882)
Effect of foreign currency translation			(80)
Ending balance	987		987
Excess Facilities [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			409
Restructuring and other credits			(62)
Cash payments			(113)
Effect of foreign currency translation			(3)
Ending balance	$ 231		$ 231