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Sale of Product Line - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Mar. 31, 2015
Jan. 31, 2015
Sale Of Product Line [Line Items]              
Net Sales $ 452,414,000 $ 504,111,000 $ 912,865,000 $ 981,553,000      
J6 Polymers, LLC [Member]              
Sale Of Product Line [Line Items]              
Pretax gain from the kits sale           $ 2,862,000  
J6 Polymers, LLC [Member] | Polyurethane Systems Product Lines [Member]              
Sale Of Product Line [Line Items]              
Sale of product line for cash             $ 3,262,000
Net Sales         $ 2,800,000