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Financial Instruments - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair Value Of Financial Instruments [Line Items]        
Fair value of note payable $ 5,300      
Cash and cash equivalents 45,824 $ 34,194 $ 18,162 $ 21,961
Cash held outside United States, principally in Netherlands, United Kingdom, China, and Canada 25,600 18,000    
Credit Agreement [Member]        
Fair Value Of Financial Instruments [Line Items]        
Fair value of debt issued $ 125,100 $ 174,800