Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)
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12 Months Ended | ||||||||||||||||||||||
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Feb. 28, 2013
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Feb. 29, 2012
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Feb. 28, 2011
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Feb. 28, 2013
Common Stock [Member]
Class A Common Stock [Member]
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Feb. 28, 2013
Additional Paid-in Capital [Member]
|
Feb. 29, 2012
Additional Paid-in Capital [Member]
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Feb. 28, 2011
Additional Paid-in Capital [Member]
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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 |