Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v2.4.0.6
Income Taxes (Details)
3 Months Ended 6 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2012
Aug. 31, 2011
Income Tax Disclosure [Abstract]        
Effective tax rate 14.90% 2.30% 24.30% 17.10%