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Intangibles (Net of Amortization) and Goodwill (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Net carrying amount of intangibles and goodwill $ 9,762,000 $ 10,907,000
Accumulated goodwill impairment $ 0 $ 0
Formulas And Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated economic life, in years 10 years  
Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated economic life, in years 10 years  
Customer Bases [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated economic life, in years 20 years  
Trademarks And Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated economic life, in years 10 years