Reorganization and Realignment Costs IT Realignment Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 4,934	$ 3,910
IT Realignment
Restructuring Cost and Reserve
Reorganization and realignment costs	0	3,559
Restructuring and Related Cost, Incurred Cost	0	3,559
Restructuring and Related Cost, Cost Incurred to Date	16,222
Restructuring Charges, Incurred to Date	16,415
IT Realignment | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	(111)	145
Restructuring and Related Cost, Cost Incurred to Date	8,280
IT Realignment | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	108	171
Restructuring and Related Cost, Cost Incurred to Date	1,404
IT Realignment | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	3	3,243
Restructuring and Related Cost, Cost Incurred to Date	6,538
IT Realignment | Share-based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	$ 0
Restructuring and Related Cost, Cost Incurred to Date	$ 193