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Segment Information - Geographic Information on Property (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Long-Lived Assets by Geographical Areas [Line Items]      
Net property $ 148,678 $ 155,839 $ 151,352
United States      
Long-Lived Assets by Geographical Areas [Line Items]      
Net property 84,675 88,368 85,247
China      
Long-Lived Assets by Geographical Areas [Line Items]      
Net property 11,732 13,504 15,128
Germany      
Long-Lived Assets by Geographical Areas [Line Items]      
Net property 7,919 7,596 17,654
Other      
Long-Lived Assets by Geographical Areas [Line Items]      
Net property $ 44,352 $ 46,371 $ 33,323