Restructuring - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 30, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Impairment of operating lease right-of-use asset (recorded in Restructuring charges)		$ 4,664	$ 17,349	$ 7,196
Q2 2019 Sales Plan
Restructuring Cost and Reserve [Line Items]
Impairment of operating lease right-of-use asset (recorded in Restructuring charges)		2,000
December 2018 Plan
Restructuring Cost and Reserve [Line Items]
Impairment of operating lease right-of-use asset (recorded in Restructuring charges)		0	4,800
June 2018 Plan
Restructuring Cost and Reserve [Line Items]
Impairment of operating lease right-of-use asset (recorded in Restructuring charges)		(100)	4,200
Restructuring cost incurred to date		4,100
June 2017 Plan
Restructuring Cost and Reserve [Line Items]
Impairment of operating lease right-of-use asset (recorded in Restructuring charges)	$ 1,000	2,700	8,400	8,000
Restructuring cost incurred to date		19,100
Minimum | June 2017 Plan
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost		20,000
Maximum | June 2017 Plan
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost		21,500
Lease Termination & Fixed Assets
Restructuring Cost and Reserve [Line Items]
Impairment of operating lease right-of-use asset (recorded in Restructuring charges)		$ 2,716	$ 7,379	$ 811
Lease Termination & Fixed Assets | June 2017 Plan
Restructuring Cost and Reserve [Line Items]
Impairment of operating lease right-of-use asset (recorded in Restructuring charges)	$ 2,700
Percentage of facility vacated				100.00%
Hyderabad | Hyderabad | Disposed of by Sale
Restructuring Cost and Reserve [Line Items]
Ownership percentage					100.00%