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Advances to and Investments in Foreign Joint Ventures' Operations - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Apr. 30, 2007
Dec. 31, 2006
Schedule Of Equity Method Investments [Line Items]                        
Equity income from foreign joint ventures’ operations                 $ 741 $ 2,194    
Dividends received                 1,170 2,522    
Net sales $ 7,690 $ 13,780 $ 12,302 $ 15,311 $ 13,693 $ 14,283 $ 13,430 $ 15,848 49,083 57,254    
Outstanding balance on note $ 870       2,610       870 2,610    
Foreign joint ventures' operations related expenses                 $ 393 522    
BOMAY                        
Schedule Of Equity Method Investments [Line Items]                        
Equity method investment, ownership percentage 40.00%               40.00%      
Investment in joint ventures                     $ 1,000 $ 1,000
Equity income from foreign joint ventures’ operations                 $ 970 2,050    
Dividends received                 1,030 1,040    
BOMAY | Affiliated Entity                        
Schedule Of Equity Method Investments [Line Items]                        
Net sales                 190 130    
Accounts receivable from foreign joint venture $ 0       30       $ 0 30    
MIEFE                        
Schedule Of Equity Method Investments [Line Items]                        
Equity method investment, ownership percentage 41.00%               41.00%      
Equity income from foreign joint ventures’ operations                 $ (230) 140    
Dividends received                 140 650    
MIEFE | Affiliated Entity                        
Schedule Of Equity Method Investments [Line Items]                        
Net sales                 50 10    
Accounts receivable from foreign joint venture $ 50       $ 0       $ 50 $ 0