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Segment Information- Sales Information by Geographic Area (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Revenue from External Customer [Line Items]        
Sales $ 133,143 $ 114,092 $ 376,381 $ 414,274
United States [Member]        
Revenue from External Customer [Line Items]        
Sales 92,838 83,144 256,287 230,960
International [Member]        
Revenue from External Customer [Line Items]        
Sales $ 40,305 $ 30,948 $ 120,094 $ 183,314