Reorganization and Realignment Costs G&A Realignment - May 2017 Plan Accrual Rollforward (Details) - G&A Realignment – May 2017 Plan [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 02, 2017	Jul. 02, 2017
Restructuring Cost and Reserve [Line Items]
Beginning balance		$ 0
Charges	$ 13,551	13,551
Payments for Restructuring		(753)
Ending balance	12,798	12,798
Severance and related employee costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance		0
Charges	13,226	13,226
Payments for Restructuring		(507)
Ending balance	12,719	12,719
Recruitment and relocation costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance		0
Charges	0	0
Payments for Restructuring		0
Ending balance	0	0
Third-party and other costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance		0
Charges	325	325
Payments for Restructuring		(246)
Ending balance	79	79
Accrued expenses and other current liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Ending balance	7,376	7,376
Other Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Ending balance	$ 5,422	$ 5,422