Pensions and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 800	$ 841	$ 2,425	$ 2,517
Interest cost	2,289	2,643	7,007	7,884
Expected return on plan assets	(416)	(397)	(1,242)	(1,186)
Amortization of prior service cost (credit)	0	0	0	0
Amortization of gains (losses)	409	253	1,243	756
Curtailments and settlements			0	0
Net periodic benefit cost	3,082	3,340	9,433	9,971
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0	0	0
Interest cost	3,925	4,091	11,775	12,240
Expected return on plan assets	(4,743)	(4,770)	(14,229)	(14,311)
Amortization of prior service cost (credit)	550	554	1,650	1,807
Amortization of gains (losses)	3,142	2,256	9,427	6,559
Curtailments and settlements			0	148
Net periodic benefit cost	2,874	2,131	8,623	6,443
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	19	19	55	58
Interest cost	130	146	391	438
Amortization of transition obligation	8	11	24	35
Amortization of prior service cost (credit)	(101)	(110)	(305)	(331)
Amortization of gains (losses)	(24)	(61)	(72)	(183)
Net periodic benefit cost	32	5	93	17
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	62	70	189	208
Interest cost	70	72	214	214
Amortization of transition obligation	0	0	0	0
Amortization of prior service cost (credit)	0	0	0	0
Amortization of gains (losses)	0	0	0	0
Net periodic benefit cost	$ 132	$ 142	$ 403	$ 422