Pensions and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 824	$ 885
Interest cost	2,181	2,042
Expected return on plan assets	(525)	(529)
Amortization of prior service cost (credit)	1	(9)
Amortization of losses (gains)	687	839
Net periodic benefit cost	3,168	3,228
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0
Interest cost	3,834	3,467
Expected return on plan assets	(4,058)	(4,976)
Amortization of prior service cost (credit)	(23)	244
Amortization of losses (gains)	1,810	3,958
Net periodic benefit cost	1,563	2,693
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	29	28
Interest cost	88	78
Amortization of prior service cost (credit)	(206)	(200)
Amortization of losses (gains)	(35)	1
Net periodic benefit cost	(124)	(93)
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	79	74
Interest cost	63	64
Amortization of prior service cost (credit)	0	0
Amortization of losses (gains)	10	0
Net periodic benefit cost	$ 152	$ 138