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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative asset classified in other current assets $ 322 $ 1,486
Derivative liability classified in other current liabilities $ 3,047 $ 263