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Advances to and Investments in Foreign Joint Ventures' Operations - Schedule of Activity in Investment in Foreign Joint Ventures (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year $ 12,054  
Equity in earnings (loss) 741 $ 2,194
Balance, end of year 11,104 12,054
Investment In Joint Ventures    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 2,047 2,101
Withdrawal from joint venture   (54)
Balance, end of year 2,047 2,047
Undistributed Earnings    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 8,515 9,496
Equity in earnings (loss) 741 2,194
Dividend distributions (1,169) (2,522)
Withdrawal from joint venture   (653)
Balance, end of year 8,087 8,515
Foreign Currency Translation    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 1,492 1,436
Change during the year (522) (15)
Withdrawal from joint venture   71
Balance, end of year 970 1,492
BOMAY    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 11,548  
Equity in earnings (loss) 970 2,050
Balance, end of year 10,896 11,548
BOMAY | Investment In Joint Ventures    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 2,033 2,033
Balance, end of year 2,033 2,033
BOMAY | Undistributed Earnings    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 8,157 7,145
Equity in earnings (loss) 973 2,054
Dividend distributions (1,032) (1,042)
Balance, end of year 8,098 8,157
BOMAY | Foreign Currency Translation    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 1,358 1,431
Change during the year (593) (73)
Balance, end of year 765 1,358
MIEFE    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 506  
Equity in earnings (loss) (230) 140
Balance, end of year 208 506
MIEFE | Investment In Joint Ventures    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 14 14
Balance, end of year 14 14
MIEFE | Undistributed Earnings    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 358 870
Equity in earnings (loss) (232) 138
Dividend distributions (137) (650)
Balance, end of year (11) 358
MIEFE | Foreign Currency Translation    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year 134 254
Change during the year 71 (120)
Balance, end of year $ 205 134
AAG | Investment In Joint Ventures    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year   54
Withdrawal from joint venture   (54)
AAG | Undistributed Earnings    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year   1,481
Equity in earnings (loss)   2
Dividend distributions   (830)
Withdrawal from joint venture   (653)
AAG | Foreign Currency Translation    
Schedule Of Equity Method Investments [Line Items]    
Balance, beginning of year   (249)
Change during the year   178
Withdrawal from joint venture   $ 71