Restructuring, Reorganization, Relocation and Severance (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Mar. 30, 2014	Jun. 28, 2015	Jun. 29, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring, reorganization, relocation and severance	$ (21)	$ 2,228		$ (142)	$ 3,559
Restructuring Reserve [Roll Forward]
Beginning accrued liability			$ 50	9,161	50
Restructuring, reorganization, relocation and severance	(21)	2,228		(142)	3,559
Expenditures				(6,750)	(2,211)
Write-offs and adjustments				(577)
Ending accrued liability	1,692	1,398		1,692	1,398
Second Quarter 2014 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, reorganization, relocation and severance				(142)	2,228
Restructuring Reserve [Roll Forward]
Beginning accrued liability			0	9,161	0
Restructuring, reorganization, relocation and severance				(142)	2,228
Expenditures				(6,750)	(880)
Write-offs and adjustments				(577)
Ending accrued liability	$ 1,692	1,348		$ 1,692	1,348
First Quarter 2014 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, reorganization, relocation and severance					1,331
Restructuring Reserve [Roll Forward]
Beginning accrued liability			0		0
Restructuring, reorganization, relocation and severance					1,331
Expenditures					(1,331)
Ending accrued liability		0			0
Group Structure Reorganization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, reorganization, relocation and severance					0
Restructuring Reserve [Roll Forward]
Beginning accrued liability			50		50
Restructuring, reorganization, relocation and severance					0
Expenditures					0
Ending accrued liability		$ 50			$ 50
First Quarter 2014 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, reorganization, relocation and severance			1,300
Restructuring Reserve [Roll Forward]
Restructuring, reorganization, relocation and severance			$ 1,300