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Investments in Foreign Joint Ventures - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended 14 Months Ended
Apr. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Joint_Ventures
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Schedule Of Equity Method Investments [Line Items]            
Interest in joint venture foreign | Joint_Ventures   2        
Net sales   $ 12,302 $ 13,430 $ 27,613 $ 29,278  
Affiliated Entity            
Schedule Of Equity Method Investments [Line Items]            
Net sales   $ 0 $ 10 $ 150 $ 20  
BOMAY            
Schedule Of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage   40.00%   40.00%   40.00%
Baoji Oilfield Machinery Co. Ltd.            
Schedule Of Equity Method Investments [Line Items]            
Interest in Joint Venture   51.00%   51.00%   51.00%
AA Energies, Inc.            
Schedule Of Equity Method Investments [Line Items]            
Interest in Joint Venture   9.00%   9.00%   9.00%
MIEFE            
Schedule Of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage   41.00%   41.00%   41.00%
MIEFE's general manager            
Schedule Of Equity Method Investments [Line Items]            
Interest in Joint Venture   8.00%   8.00%   8.00%
Sonepar of France            
Schedule Of Equity Method Investments [Line Items]            
Interest in Joint Venture   51.00%   51.00%   51.00%
AAG            
Schedule Of Equity Method Investments [Line Items]            
Withdrawal from joint venture $ 640          
Proceeds from withdrawal from joint venture           $ 400
Notes receivable foreign currency translation adjustment   $ 140   $ 140   $ 140
Imputed interest       5.00%    
AAG | Subordinated Note            
Schedule Of Equity Method Investments [Line Items]            
Subordinated notes percentage   0.00%   0.00%   0.00%
Subordinated notes maturity date       Apr. 30, 2015