Reorganization and Realignment Costs G&A Realignment Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 2,102	$ 2,911	$ 7,036	$ 6,821
G&A Realignment
Restructuring Cost and Reserve
Reorganization and realignment costs	(16)	64	(34)	331
Restructuring and Related Cost, Incurred Cost	(24)	(6)	(53)	162
Restructuring and Related Cost, Cost Incurred to Date	29,312		29,312
Restructuring Charges, Incurred to Date	38,777		38,777
G&A Realignment | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	(22)	(6)	(53)	146
Restructuring and Related Cost, Cost Incurred to Date	24,213		24,213
G&A Realignment | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	(1)	0	0	15
Restructuring and Related Cost, Cost Incurred to Date	2,876		2,876
G&A Realignment | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	(1)	0	0	1
Restructuring and Related Cost, Cost Incurred to Date	2,223		2,223
G&A Realignment | Share-based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	8	70	19	169
Restructuring and Related Cost, Cost Incurred to Date	8,130		8,130
G&A Realignment | Termination of defined benefit plans
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	$ 0	0	$ 0
Restructuring and Related Cost, Cost Incurred to Date	$ 1,335		$ 1,335