Pensions and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 811	$ 849	$ 1,625	$ 1,676
Interest cost	2,344	2,679	4,718	5,241
Expected return on plan assets	(414)	(398)	(826)	(789)
Amortization of prior service cost (credit)	0	0	0	0
Amortization of gains (losses)	416	254	834	503
Curtailments and settlements	0	0	0	0
Net periodic benefit cost	3,157	3,384	6,351	6,631
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0	0	0
Interest cost	3,923	4,081	7,850	8,149
Expected return on plan assets	(4,770)	(4,888)	(9,486)	(9,541)
Amortization of prior service cost (credit)	550	612	1,100	1,253
Amortization of gains (losses)	3,174	2,201	6,285	4,303
Curtailments and settlements	0	148	0	148
Net periodic benefit cost	2,877	2,154	5,749	4,312
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	18	20	36	39
Interest cost	131	146	261	292
Amortization of transition obligation	8	12	16	24
Amortization of prior service cost (credit)	(102)	(111)	(204)	(221)
Amortization of gains (losses)	(26)	(61)	(48)	(122)
Net periodic benefit cost	29	6	61	12
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	63	71	127	138
Interest cost	71	73	144	142
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	$ 134	$ 144	$ 271	$ 280