Pension And Other Postretirement Benefits Liabilities (Schedule Of Components Of Net Pension And Postretirement Periodic Benefit Cost (Income)) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Sep. 26, 2010	Oct. 02, 2011	Sep. 26, 2010
U.S. Defined Benefit Postretirement Benefit Plans [Member]
Service cost				$ 189
Interest cost	3,029	2,945	9,088	8,836
Expected return on plan assets	(2,689)	(2,803)	(8,066)	(8,408)
Actuarial loss	563	292	1,689	876
Net pension and postretirement periodic benefit cost (income)	903	434	2,711	1,493
Foreign Pension Plans [Member]
Service cost		74		222
Interest cost	529	462	1,585	1,385
Expected return on plan assets	(517)	(559)	(1,552)	(1,677)
Transition asset	(33)	(31)	(100)	(94)
Actuarial loss	163	9	490	28
Net pension and postretirement periodic benefit cost (income)	142	(45)	423	(136)
Other Postretirement Benefit Plans [Member]
Interest cost	40	64	120	191
Actuarial loss		11		34
Prior service cost	(40)		(120)
Net pension and postretirement periodic benefit cost (income)		$ 75		$ 225