Segment Information - Geographic Information on Property (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Long-Lived Assets by Geographical Areas [Line Items]
Net property	$ 155,839	$ 151,352	$ 152,755
United States
Long-Lived Assets by Geographical Areas [Line Items]
Net property	88,368	85,247	82,274
China
Long-Lived Assets by Geographical Areas [Line Items]
Net property	13,504	15,128	16,010
Germany
Long-Lived Assets by Geographical Areas [Line Items]
Net property	7,596	17,654	16,882
Other
Long-Lived Assets by Geographical Areas [Line Items]
Net property	$ 46,371	$ 33,323	$ 37,589