Accumulated Other COMPREHENSIVE EARNINGS (LOSS): (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 29, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	$ (13,098)	$ (4,638)
Other comprehensive earnings (loss) before reclassifications	(2,858)	(1,506)
Reclassifications from accumulated other comprehensive loss	198	(9)
Other comprehensive earnings (loss) net of tax	(2,660)	(1,515)
Balance at the end of the period	(15,758)	(6,153)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other income, net	(473)	(1,666)
Product cost of goods sold	67,145	66,865
Selling, marketing and administrative expenses	25,984	25,631
Total before tax	(13,437)	(16,694)
Income tax expense benefit	(853)	(866)
Net earnings	(9,103)	(9,357)
Reclassified from Accumulated OCI into Earnings
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Total before tax	312	(14)
Income tax expense benefit	(114)	5
Net earnings	198	(9)
AOCI from Derivatives | Foreign currency forward contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(1,236)	(436)
Other comprehensive earnings (loss) before reclassifications	(1,214)	(760)
Reclassifications from accumulated other comprehensive loss	327	167
Other comprehensive earnings (loss) net of tax	(887)	(593)
Balance at the end of the period	(2,123)	(1,029)
AOCI from Derivatives | Foreign currency forward contracts | Reclassified from Accumulated OCI into Earnings
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other income, net	513	262
AOCI from Derivatives | Commodity futures contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(470)	(96)
Other comprehensive earnings (loss) before reclassifications	(722)	229
Reclassifications from accumulated other comprehensive loss	103	112
Other comprehensive earnings (loss) net of tax	(619)	341
Balance at the end of the period	(1,089)	245
AOCI from Derivatives | Commodity futures contracts | Reclassified from Accumulated OCI into Earnings
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Product cost of goods sold	162	175
Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(332)	54
Other comprehensive earnings (loss) before reclassifications	237	(138)
Other comprehensive earnings (loss) net of tax	237	(138)
Balance at the end of the period	(95)	(84)
Postretirement and Pension Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	6,439	9,367
Reclassifications from accumulated other comprehensive loss	(232)	(288)
Other comprehensive earnings (loss) net of tax	(232)	(288)
Balance at the end of the period	6,207	9,079
Postretirement and Pension Benefits | Reclassified from Accumulated OCI into Earnings
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Product cost of goods sold	(178)	(221)
Selling, marketing and administrative expenses	(185)	(230)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(17,499)	(13,527)
Other comprehensive earnings (loss) before reclassifications	(1,159)	(837)
Other comprehensive earnings (loss) net of tax	(1,159)	(837)
Balance at the end of the period	$ (18,658)	$ (14,364)