Provision For Restructuring (Schedule Of Restructuring Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Restructuring Cost and Reserve [Line Items]
Total	$ 432	$ 1,304
Profit Enhancement Plan
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	332	1,346
Other exit costs	70	47
Total	400
Global Restructuring Plan (including LEAN)
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	28	(89)
Other exit costs	2	$ 0
Total	$ 30