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Subsequent Event - Additional Information (Detail)
$ in Thousands
1 Months Ended 9 Months Ended
Oct. 31, 2016
USD ($)
Customer
t
Oct. 31, 2016
BRL
Sep. 30, 2015
USD ($)
Oct. 31, 2016
BRL
Customer
t
Subsequent Event [Line Items]        
Paid from cash on hand     $ 5,133  
Tebras And PBC [Member] | Subsequent Event [Member] | Surfactants [Member] | Brazil [Member]        
Subsequent Event [Line Items]        
Acquisition purchase price $ 24,616     BRL 79,000,000
Paid from cash on hand 21,812 BRL 70,000,000    
Deposited in escrow 2,804     BRL 9,000,000
Combined entities annual sales $ 32,000      
Capacity of production facility purchased in connection with acquisition | t 25,000     25,000
Tebras And PBC [Member] | Subsequent Event [Member] | Surfactants [Member] | Brazil [Member] | Minimum [Member]        
Subsequent Event [Line Items]        
Number of customers | Customer 1,200     1,200