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Intangible Assets (Schedule Of Finite And Indefinite Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Schedule Of Finite and Indefinite Intangible Assets [Line Items]    
Amortized intangible assets, Net carrying amount $ 7,324  
Total, Gross carrying amount 40,908 $ 38,301
Total, Net carrying amount 35,154 34,349
Trade Name And Trademarks [Member]    
Schedule Of Finite and Indefinite Intangible Assets [Line Items]    
Amortized intangible assets, Gross carrying amount 4,080 3,820
Amortized intangible assets, Accumulated amortization (3,010) (2,440)
Amortized intangible assets, Net carrying amount $ 1,070 $ 1,380
Weighted-average amortization period (years) 10 years 10 years
Product Formulas [Member]    
Schedule Of Finite and Indefinite Intangible Assets [Line Items]    
Amortized intangible assets, Gross carrying amount $ 8,998 $ 8,424
Amortized intangible assets, Accumulated amortization (2,744) (1,512)
Amortized intangible assets, Net carrying amount $ 6,254 $ 6,912
Weighted-average amortization period (years) 8 years 8 years
Direct Sales License [Member]    
Schedule Of Finite and Indefinite Intangible Assets [Line Items]    
Indefinite-lived intangible assets, Gross carrying amount $ 27,830 $ 26,057