Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)

v2.4.0.6
Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)
12 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Feb. 28, 2011
Feb. 28, 2013
Common Stock [Member]
Class A Common Stock [Member]
Feb. 28, 2013
Additional Paid-in Capital [Member]
Feb. 29, 2012
Additional Paid-in Capital [Member]
Feb. 28, 2011
Additional Paid-in Capital [Member]
Feb. 28, 2013
Treasury Stock [Member]
Feb. 29, 2012
Treasury Stock [Member]
Feb. 28, 2011
Treasury Stock [Member]
Feb. 28, 2013
Restricted stock units (RSUs) [Member]
Feb. 29, 2012
Restricted stock units (RSUs) [Member]
Feb. 28, 2011
Restricted stock units (RSUs) [Member]
Feb. 28, 2011
Restricted stock units (RSUs) [Member]
Common Stock [Member]
Class A Common Stock [Member]
Feb. 28, 2013
Restricted stock units (RSUs) [Member]
Additional Paid-in Capital [Member]
Feb. 29, 2012
Restricted stock units (RSUs) [Member]
Additional Paid-in Capital [Member]
Feb. 28, 2011
Restricted stock units (RSUs) [Member]
Additional Paid-in Capital [Member]
Feb. 28, 2013
Restricted stock units (RSUs) [Member]
Treasury Stock [Member]
Feb. 29, 2012
Restricted stock units (RSUs) [Member]
Treasury Stock [Member]
Feb. 28, 2011
Restricted stock units (RSUs) [Member]
Treasury Stock [Member]
Feb. 29, 2012
Performance stock units [Member]
Feb. 29, 2012
Performance stock units [Member]
Additional Paid-in Capital [Member]
Feb. 29, 2012
Performance stock units [Member]
Treasury Stock [Member]
Repurchase of Class A Common shares 17,994,466 21,234,266 17,240,101         17,994,466 21,234,266 17,240,101                          
Conversion of Class B Convertible Common shares to Class A Common shares 66,881 33,842 116,879                                        
Exercise of Class A stock options 8,234,324 3,438,706 5,100,677 8,234,324 8,234,324 3,438,706 5,100,677                                
Employee stock purchases of treasury shares 210,895 279,361 305,207   210,895 279,361 305,207 210,895 279,361 305,207                          
Grant of Class A Common shares - restricted stock awards         18,190 622,092 739,388 18,190 622,092 739,388 609,080 80,970 125,349               319,880    
Vesting of stock units, net of shares withheld to satisfy tax withholding requirements                     42,664 38,783 53,780 10,695 42,664 38,783 53,780 42,664 38,783 43,085 123,822 123,822 123,822
Shares withheld to satisfy tax withholding requirements                     23,836 22,145 23,628   23,836 22,145 23,628 23,836 22,145 23,628 78,383 78,383 78,383
Cancellation of restricted Class A Common shares         61,140 105,402 37,864 61,140 105,402 37,864 24,159 36,458 211,289               33,875