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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended
May 31, 2016
May 31, 2015
Income Taxes    
Effective income tax rate (as a percent) 1.90% 14.20%
Tax benefit recorded related to the resolution of an uncertain tax position $ 1,400  
Tax benefit recorded related to the recognition of excess tax benefits from share-based compensation $ 1,100