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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Income Tax Disclosure [Abstract]    
Income tax expense $ (4,294) $ (964)
Income tax effective rate 48.10% 14.20%
Income tax effective rate excluding the impact of discrete charges 46.30% 9.20%