Pensions and Other Postretirement Benefits (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 841	$ 514	$ 2,517	$ 2,048
Interest cost	2,643	2,541	7,884	8,104
Expected return on plan assets	(397)	(340)	(1,186)	(1,263)
Amortization of prior service cost (credit)	0	0	0	0
Amortization of gains (losses)	253	42	756	129
Curtailments and settlements	0	0	0	0
Net periodic benefit cost	3,340	2,757	9,971	9,018
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0	0	0
Interest cost	4,091	4,011	12,240	12,068
Expected return on plan assets	(4,770)	(4,525)	(14,311)	(13,574)
Amortization of prior service cost (credit)	554	631	1,807	833
Amortization of gains (losses)	2,256	2,329	6,559	6,986
Curtailments and settlements	0	0	148	0
Net periodic benefit cost	2,131	2,446	6,443	6,313
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	19	19	58	76
Interest cost	146	162	438	553
Amortization of transition obligation	11	19	35	56
Amortization of prior service cost (credit)	(110)	(111)	(331)	(331)
Amortization of gains (losses)	(61)	(59)	(183)	(161)
Net periodic benefit cost	5	30	17	193
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	70	62	208	190
Interest cost	72	71	214	217
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	$ 142	$ 133	$ 422	$ 407