Realignment and reorganization costs G&A Realignment Costs (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 28, 2015	Jun. 29, 2014		Jun. 28, 2015	Jun. 29, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 6,279	$ 1,276	[1]	$ 10,892	$ 15,987	[1]
General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining		4,500			4,500
Restructuring and Related Cost, Incurred Cost		1,160			3,644
Restructuring Charges		4,372	$ 0		8,535	$ 0
Restructuring and Related Cost, Cost Incurred to Date		15,858			15,858
Restructuring Charges, Incurred to Date		21,461			21,461
General and Administrative Realignment and Reinvestment [Member] | Severance and related employee costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		637			2,619
Restructuring and Related Cost, Cost Incurred to Date		14,536			14,536
General and Administrative Realignment and Reinvestment [Member] | Recruitment and relocation costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining		3,500			3,500
Restructuring and Related Cost, Incurred Cost		514			984
Restructuring and Related Cost, Cost Incurred to Date		1,193			1,193
General and Administrative Realignment and Reinvestment [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		9			41
Restructuring and Related Cost, Cost Incurred to Date		129			129
General and Administrative Realignment and Reinvestment [Member] | Share Based Compensation Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining		1,000			1,000
Restructuring Charges	[2]	3,212			4,891
Restructuring Charges, Incurred to Date	[2]	$ 5,603			$ 5,603

[1] Previously titled “Facilities action charges (income), net.”

[2] Represents incremental share-based compensation resulting from the modification of stock options and performance-based awards in connection with the termination of employees under our G&A realignment plan.