Reorganization and Realignment Costs System Optimization Accrual Rollforward (Details) - System Optimization - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Restructuring Reserve [Roll Forward]
Beginning balance			$ 101	$ 875
Charges	$ 232	$ 2,091	867	5,295
Payments for Restructuring			(958)	(6,065)
Ending balance	10	105	10	105
Severance and related employee costs
Restructuring Reserve [Roll Forward]
Beginning balance			0	77
Charges	0	28	3	46
Payments for Restructuring			(3)	(123)
Ending balance	0	0	0	0
Professional fees
Restructuring Reserve [Roll Forward]
Beginning balance			101	708
Charges	232	1,991	794	5,137
Payments for Restructuring			(885)	(5,740)
Ending balance	10	105	10	105
Other
Restructuring Reserve [Roll Forward]
Beginning balance			0	90
Charges	0	72	70	112
Payments for Restructuring			(70)	(202)
Ending balance	$ 0	$ 0	$ 0	$ 0