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Summary of Business Sales Segmentation as per Product (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Net Sales:        
Total Crop $ 77,145 $ 75,292 $ 192,689 $ 155,181
Non-crop 9,616 9,545 15,609 16,911
Total Sales 86,761 84,837 208,298 172,092
Insecticides
        
Net Sales:        
Total Crop 39,218 45,432 118,085 101,266
Herbicides
        
Net Sales:        
Total Crop 24,699 13,656 57,685 33,332
Other
        
Net Sales:        
Total Crop $ 13,228 $ 16,204 $ 16,919 $ 20,583