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Financial Instruments and Risk Management (Details)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2013
VEF / $
Aug. 31, 2015
USD ($)
VEF / $
Aug. 31, 2014
USD ($)
Aug. 31, 2015
USD ($)
VEF / $
Aug. 31, 2014
USD ($)
SG&A          
Foreign Currency Risk and Currency Exchange Uncertainties          
Net foreign exchange gains (losses), including the impact of currency hedges and currency swaps | $   $ (1,220) $ (1,100) $ (2,100) $ (1,130)
Income Tax Expense (Benefit)          
Foreign Currency Risk and Currency Exchange Uncertainties          
Net foreign exchange gains (losses), including the impact of currency hedges and currency swaps | $   $ (70) $ 60 $ 70 $ 100
Venezuelan Bolivar          
Currency Exchange Uncertainties          
Value of foreign currency before devaluation (in Bolivars per dollar) 4.30        
Value of foreign currency after devaluation (in Bolivars per dollar) 6.30        
Foreign currency exchange rate ( in foreign currency per dollar)   6.30   6.30  
Venezuelan Bolivar | SICAD 1          
Currency Exchange Uncertainties          
Foreign currency exchange rate ( in foreign currency per dollar)   12.80   12.80  
Venezuelan Bolivar | SIMADI          
Currency Exchange Uncertainties          
Foreign currency exchange rate ( in foreign currency per dollar)   200   200  
Chinese Renminbi          
Currency Exchange Uncertainties          
Depreciation against the USD, as a percent   4.40%      
Geographic concentration | Venezuela          
Currency Exchange Uncertainties          
Net investment | $   $ 13,350   $ 13,350  
Net sales revenue | Geographic concentration          
Foreign Currency Risk and Currency Exchange Uncertainties          
Percentage of net sales   15.00% 16.00% 15.00% 16.00%
Net sales revenue | Geographic concentration | International operations - transactions denominated in foreign currencies          
Foreign Currency Risk and Currency Exchange Uncertainties          
Percentage of net sales       15.00%  
Net sales revenue | Geographic concentration | Venezuela          
Foreign Currency Risk and Currency Exchange Uncertainties          
Percentage of net sales   1.60% 0.90% 1.40% 0.80%