Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 826	$ 831	$ 1,655	$ 1,655
Interest cost	1,419	2,195	2,851	4,376
Expected return on plan assets	(456)	(532)	(910)	(1,057)
Amortization of prior service cost (credit)	0	1	0	2
Amortization of losses (gains)	1,282	691	2,581	1,378
Net periodic benefit cost	3,071	3,186	6,177	6,354
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0	0	0
Interest cost	2,885	3,834	5,828	7,668
Expected return on plan assets	(3,398)	(4,058)	(6,783)	(8,116)
Amortization of prior service cost (credit)	16	(23)	32	(46)
Amortization of losses (gains)	2,074	1,810	4,096	3,620
Net periodic benefit cost	1,577	1,563	3,173	3,126
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	30	29	60	58
Interest cost	84	88	167	176
Amortization of prior service cost (credit)	(209)	(206)	(418)	(412)
Amortization of transition obligation			0	0
Amortization of losses (gains)	23	(35)	45	(70)
Net periodic benefit cost	(72)	(124)	(146)	(248)
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	68	79	137	158
Interest cost	36	63	73	126
Amortization of prior service cost (credit)	0	0	0	0
Amortization of transition obligation			0	0
Amortization of losses (gains)	19	10	38	20
Net periodic benefit cost	123	$ 152	$ 248	$ 304
Minimum [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	0
Maximum [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	$ 35,000