Pensions and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 814	$ 827
Interest cost	2,374	2,562
Expected return on plan assets	(412)	(391)
Amortization of transition obligation	0	0
Amortization of prior service cost (credit)	0	0
Amortization of gains (losses)	418	249
Net periodic benefit cost	3,194	3,247
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0
Interest cost	3,927	4,068
Expected return on plan assets	(4,716)	(4,653)
Amortization of transition obligation	0	0
Amortization of prior service cost (credit)	550	641
Amortization of gains (losses)	3,111	2,102
Net periodic benefit cost	2,872	2,158
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	18	19
Interest cost	130	146
Amortization of transition obligation	8	12
Amortization of prior service cost (credit)	(102)	(110)
Amortization of gains (losses)	(22)	(61)
Net periodic benefit cost	32	6
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	64	67
Interest cost	73	69
Amortization of transition obligation	0	0
Amortization of prior service cost (credit)	0	0
Amortization of gains (losses)	0	0
Net periodic benefit cost	$ 137	$ 136