Pensions and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Defined Benefit Plan Disclosure [Line Items]
Curtailments and settlements	$ 15,588	$ 0	$ 15,588	$ 0
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	826	864	2,481	2,621
Interest cost	2,149	2,022	6,525	6,076
Expected return on plan assets	(534)	(510)	(1,591)	(1,559)
Amortization of prior service cost (credit)	1	(9)	3	(26)
Amortization of losses (gains)	677	832	2,055	2,499
Curtailments and settlements	0	0	0	0
Net periodic benefit cost	3,119	3,199	9,473	9,611
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0	0	0
Interest cost	3,313	3,471	10,981	10,412
Expected return on plan assets	(3,578)	(4,781)	(11,694)	(14,343)
Amortization of prior service cost (credit)	(23)	244	(69)	733
Amortization of losses (gains)	1,507	3,733	5,127	11,198
Curtailments and settlements	15,588	0	15,588	0
Net periodic benefit cost	16,807	2,667	19,933	8,000
Defined Benefit Plan, Settlements, Benefit Obligation			59,400
Number of pension plan participants for whom annuity contracts were purchased			700
Participants who accepted voluntary lump-sum offer			800
Reduction of plan participants			1,500
Percentage of total participants			23.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	29	28	87	83
Interest cost	88	78	264	235
Amortization of prior service cost (credit)	(206)	(200)	(618)	(599)
Amortization of losses (gains)	(35)	1	(105)	3
Net periodic benefit cost	(124)	(93)	(372)	(278)
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	77	74	235	222
Interest cost	61	64	187	191
Amortization of prior service cost (credit)	0	0	0	0
Amortization of losses (gains)	9	0	29	0
Net periodic benefit cost	$ 147	$ 138	$ 451	$ 413