Restructuring Charges (Narrative) (Details) $ in Thousands	3 Months Ended					12 Months Ended	14 Months Ended
	Dec. 31, 2016 USD ($) employee	Sep. 30, 2016 USD ($)	Jul. 02, 2016 USD ($)	Apr. 02, 2016 USD ($)	Jan. 02, 2016 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Charge to operations, net	$ 6,285				$ 37,147		$ 83,300
Payments for Restructuring	15,815	$ 5,100	$ 8,100	$ 25,100	16,700
Restructuring Reserve	25,649	36,608				$ 36,608	25,649
Employee severance and related benefits
Restructuring Cost and Reserve [Line Items]
Charge to operations, net	2,399
Severance Costs	100					600
Payments for Restructuring	15,537
Restructuring Reserve	20,896	35,177				35,177	20,896
Facility closures and related costs
Restructuring Cost and Reserve [Line Items]
Charge to operations, net	3,886
Payments for Restructuring	278
Restructuring Reserve	$ 4,753	1,431				$ 1,431	4,753
Restructuring Plan 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employee	795
Q116 plan [Domain] | Employee severance and related benefits
Restructuring Cost and Reserve [Line Items]
Charge to operations, net	$ 6,300	$ 31,800	$ 3,400	$ 5,000	$ 36,800
Accrued Expenses and Other Current Liabilities [Member] | Facility closures and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2,400						2,400
Other Noncurrent Liabilities [Member] | Facility closures and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2,400						2,400
Restructuring Charges [Member] | Facility closures and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 2,200						$ 2,200