Pensions and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 885	$ 814
Interest cost	2,042	2,374
Expected return on plan assets	(529)	(412)
Amortization of prior service cost (credit)	(9)	0
Amortization of gains (losses)	839	418
Net periodic benefit cost	3,228	3,194
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0
Interest cost	3,467	3,927
Expected return on plan assets	(4,976)	(4,716)
Amortization of prior service cost (credit)	244	550
Amortization of gains (losses)	3,958	3,111
Net periodic benefit cost	2,693	2,872
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	28	18
Interest cost	78	130
Amortization of transition obligation	0	8
Amortization of prior service cost (credit)	(200)	(102)
Amortization of gains (losses)	1	(22)
Net periodic benefit cost	(93)	32
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	74	64
Interest cost	64	73
Amortization of transition obligation	0	0
Amortization of prior service cost (credit)	0	0
Amortization of gains (losses)	0	0
Net periodic benefit cost	$ 138	$ 137