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Other Income (Loss) - Summary of Other (Loss) Income (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Other Income and Expenses [Abstract]      
TIL stock purchase warrants received   $ 6,839  
Volatile organic compound emission plant lease (loss) income $ (417) 24 $ 238
Impairment of marketable securities (683) (1,322) (2,062)
Miscellaneous income 2,666 1,006 9,229
Loss on bond repurchases   (7,699) (1,759)
Other income (loss) $ 1,566 $ (1,152) $ 5,646