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Earnings Before Income Taxes and Tax Provisions - (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income before income taxes:      
Domestic $ 25,508 $ 11,170 $ 6,891
Foreign 103,430 83,051 39,339
Earnings before income tax $ 128,938 $ 94,221 $ 46,230