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Shareholders' Equity - Changes in Shareholders' Equity (Parenthetical) (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2015
Aug. 31, 2014
Statement of Stockholders' Equity [Abstract]        
Deferred tax on foreign currency translation     $ 2,006  
Dividends paid, per share amount $ 0.175 $ 0.175 $ 0.350 $ 0.350