Restructuring Activities - Restructuring Plan Reserve Recorded in Accrued Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2022	Jun. 27, 2021	Jun. 26, 2022	Jun. 27, 2021
Restructuring Reserve
Balance, beginning of period	$ 1,233	$ 7,474	$ 2,995	$ 23,920
Restructuring benefit	(264)	918	(392)	552
Utilized – cash	(132)	(4,693)	(1,764)	(21,136)
Utilized – non cash	0		0	251
Utilized – non cash		(276)
Foreign currency changes	(14)	(93)	(16)	(257)
Balance, end of period	823	3,330	823	3,330
Employee Termination Benefits
Restructuring Reserve
Balance, beginning of period	100	3,007	121	7,724
Restructuring benefit	0	(22)	0	(966)
Utilized – cash	(18)	(1,685)	(36)	(5,346)
Utilized – non cash	0		0	0
Utilized – non cash		0
Foreign currency changes	(3)	(54)	(6)	(166)
Balance, end of period	79	1,246	79	1,246
Contract Terminations & Other
Restructuring Reserve
Balance, beginning of period	1,133	4,467	2,874	16,196
Restructuring benefit	(264)	664	(392)	1,769
Utilized – cash	(114)	(3,008)	(1,728)	(15,790)
Utilized – non cash	0		0	0
Utilized – non cash		0
Foreign currency changes	(11)	(39)	(10)	(91)
Balance, end of period	744	2,084	744	2,084
Non-Current Asset Adjustments
Restructuring Reserve
Balance, beginning of period	0	0	0	0
Restructuring benefit	0	276	0	(251)
Utilized – cash	0	0	0	0
Utilized – non cash	0		0	251
Utilized – non cash		(276)
Foreign currency changes	0	0	0	0
Balance, end of period	$ 0	$ 0	$ 0	$ 0