Retirement Plans Net Periodic Benefit Costs and Amount Recognized in Other Comprehensive Income (Loss) (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Amortization of prior service cost	$ (28)	$ (21)
Amortization of net actuarial (loss) gain	(6)	761
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	1,233	1,033	752
Interest cost	3,189	2,902	3,056
Expected return on assets	(4,055)	(3,548)	(3,224)
Loss recognized due to settlements	0	0	0
Amortization of prior service cost	10	1	0
Amortization of net actuarial loss (gain)	0	240	4
Net periodic benefit cost	377	628	588
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net actuarial loss (gain)	13,976	(11,228)	3,447
Prior service cost	0	112	5
Loss recognized due to settlements	0	0	0
Amortization of prior service cost	(10)	(1)	0
Amortization of net actuarial (loss) gain	0	(240)	(4)
Total recognized	13,966	(11,357)	3,448
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	2,373	2,785	2,421
Interest cost	3,616	3,769	3,925
Expected return on assets	(4,275)	(3,900)	(3,726)
Loss recognized due to settlements	117	599	0
Amortization of prior service cost	26	20	21
Amortization of net actuarial loss (gain)	54	508	45
Net periodic benefit cost	1,911	3,781	2,686
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net actuarial loss (gain)	8,023	(9,121)	8,040
Prior service cost	125	0	0
Loss recognized due to settlements	(117)	(599)	0
Amortization of prior service cost	(26)	(20)	(21)
Amortization of net actuarial (loss) gain	(54)	(508)	(45)
Total recognized	7,951	(10,248)	7,974
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	11	12	13
Interest cost	186	185	233
Amortization of prior service cost	(8)	0	0
Amortization of net actuarial loss (gain)	(88)	(8)	1
Net periodic benefit cost	101	189	247
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net actuarial loss (gain)	342	(817)	109
Prior service cost	0	(51)	0
Amortization of prior service cost	8	0	0
Amortization of net actuarial (loss) gain	88	8	(1)
Total recognized	$ 438	$ (860)	$ 108