Reorganization and Realignment Costs G&A Realignment - May 2017 Plan Accrual Rollforward (Details) - G&A Realignment – May 2017 Plan - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 01, 2017	Oct. 01, 2017
Restructuring Cost and Reserve
Beginning balance		$ 0
Charges	$ 1,851	15,402
Payments for Restructuring		(2,207)
Ending balance	13,195	13,195
Severance and related employee costs
Restructuring Cost and Reserve
Beginning balance		0
Charges	1,210	14,436
Payments for Restructuring		(1,350)
Ending balance	13,086	13,086
Recruitment and relocation costs
Restructuring Cost and Reserve
Beginning balance		0
Charges	145	145
Payments for Restructuring		(36)
Ending balance	109	109
Third-party and other costs
Restructuring Cost and Reserve
Beginning balance		0
Charges	496	821
Payments for Restructuring		(821)
Ending balance	0	0
Accrued expenses and other current liabilities
Restructuring Cost and Reserve
Ending balance	7,766	7,766
Other Liabilities
Restructuring Cost and Reserve
Ending balance	$ 5,429	$ 5,429