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Goodwill (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Balance     $ 148,367 $ 149,718
Acquisition of Supreme     165,400  
Effects of foreign currency     (141) 230
Impairment of goodwill $ 0 $ 0 0 (1,663)
Balance $ 313,626 $ 148,285 $ 313,626 $ 148,285