Reorganization and Realignment Costs IT Realignment Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 3,910	$ 798
IT Realignment
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	1,500
Restructuring and Related Cost, Incurred Cost	3,559
Restructuring and Related Cost, Cost Incurred to Date	12,493
Reorganization and realignment costs	3,559	$ 0
Restructuring Charges, Incurred to Date	12,686
IT Realignment | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	145
Restructuring and Related Cost, Cost Incurred to Date	7,693
IT Realignment | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	171
Restructuring and Related Cost, Cost Incurred to Date	171
IT Realignment | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	3,243
Restructuring and Related Cost, Cost Incurred to Date	4,629
IT Realignment | Share based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0
Restructuring and Related Cost, Cost Incurred to Date	193
IT Realignment | Minimum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost	13,000
IT Realignment | Maximum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost	$ 15,000