Reorganization and Realignment Costs System Optimization Accrual Rollforward (Details) - System Optimization [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015		Sep. 28, 2014
Restructuring Reserve [Roll Forward]
Beginning balance			$ 2,804
Charges	$ 804	$ 1,264	1,539		$ 13,141
Payments			(4,014)
Ending balance	329		329
Severance and related employee costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			2,235
Charges	225	715	854		6,641
Payments			(3,003)
Ending balance	86		86
Professional fees [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			146
Charges	242	38	393		3,227
Payments			(488)
Ending balance	51		51
Other [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			423
Charges	337	$ 511	292	[1]	$ 3,273
Payments			(523)
Ending balance	$ 192		$ 192

[1] The nine months ended September 27, 2015 includes a reversal of an accrual of $210 as a result of a change in estimate.