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Goodwill - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]      
Goodwill $ 267,400,000 $ 276,100,000 $ 187,900,000
Impairment of goodwill 0 0 1,300,000
Fuel Specialties [Member]      
Goodwill [Line Items]      
Goodwill 228,300,000 229,400,000 141,100,000
Impairment of goodwill 0 0 0
Performance Chemicals [Member]      
Goodwill [Line Items]      
Goodwill 39,100,000 46,700,000 46,800,000
Impairment of goodwill $ 0 $ 0 $ 0