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Income Taxes - Schedule of Income (Loss) from Continuing Operations Before Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
U.S. $ 28,642 $ 27,774 $ 23,006
Non-U.S. (5,757) 8,617 (3,982)
Income before income taxes $ 22,885 $ 36,391 $ 19,024