Accumulated Other Comprehensive Earnings (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	$ (4,638)	$ (16,447)
Other comprehensive earnings (loss) before reclassifications	(1,506)	(57)
Reclassifications from accumulated other comprehensive loss	(9)	226
Net other comprehensive earnings (loss) net of tax	(1,515)	283
Balance at the end of the period	(6,153)	(16,164)
Income tax expense benefit	(866)	(506)
Foreign Currency Translation Adjustment
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(13,527)	(13,406)
Other comprehensive earnings (loss) before reclassifications	(837)	1,141
Net other comprehensive earnings (loss) net of tax	(837)	1,141
Balance at the end of the period	(14,364)	(12,265)
Income tax expense benefit	(481)	(19)
Investments
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	54	908
Other comprehensive earnings (loss) before reclassifications	(138)	(491)
Net other comprehensive earnings (loss) net of tax	(138)	(491)
Balance at the end of the period	(84)	417
Income tax expense benefit	(78)	(279)
Foreign Currency Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(436)
Other comprehensive earnings (loss) before reclassifications	(760)	(180)
Reclassifications from accumulated other comprehensive loss	167	22
Net other comprehensive earnings (loss) net of tax	(593)	(158)
Balance at the end of the period	(1,029)	(158)
Income tax expense benefit	(336)	(89)
Commodity Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(96)	(111)
Other comprehensive earnings (loss) before reclassifications	229	(413)
Reclassifications from accumulated other comprehensive loss	112	204
Net other comprehensive earnings (loss) net of tax	341	(209)
Balance at the end of the period	245	(320)
Income tax expense benefit	192	(119)
Postretirement and Pension Benefits
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	9,367	(3,838)
Reclassifications from accumulated other comprehensive loss	(288)
Net other comprehensive earnings (loss) net of tax	(288)
Balance at the end of the period	9,079	(3,838)
Income tax expense benefit	$ (163)	$ 0