v2.4.0.6
Share-Based Compensation (Outstanding Stock Options) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended
Nov. 30, 2011
years
Feb. 28, 2011
Nov. 30, 2011
$7.14 To $10.75 [Member]
years
Nov. 30, 2011
$11.43 [Member]
years
Nov. 30, 2011
$13.19 To $14.13 [Member]
years
Nov. 30, 2011
$14.49 To $19.36 [Member]
years
Nov. 30, 2011
$19.82 [Member]
years
Nov. 30, 2011
$19.98 To $24.99 [Member]
years
Nov. 30, 2011
$25.39 [Member]
years
Nov. 30, 2011
$25.67 To $33.11 [Member]
years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options Outstanding, Number of Shares 13,406   574 2,359 1,729 1,932 1,717 1,354 1,750 1,991
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 3.8   1.3 4.4 3.0 2.0 3.4 2.5 5.4 6.2
Options Outstanding, Weighted Average Exercise Price $ 19.52 $ 17.31 $ 7.39 $ 11.43 $ 13.42 $ 15.91 $ 19.82 $ 24.78 $ 25.39 $ 32.43
Options Exercisable, Number of Shares 8,508   574 1,082 1,729 1,880 1,253 1,319 488 183
Options Exercisable, Weighted Average Exercise Price $ 17.07   $ 7.39 $ 11.43 $ 13.42 $ 15.89 $ 19.82 $ 24.91 $ 25.39 $ 29.83
Range of Exercise Prices, lower range     $ 7.14   $ 13.19 $ 14.49   $ 19.98   $ 25.67
Range of Exercise Prices, upper range     $ 10.75 $ 11.43 $ 14.13 $ 19.36 $ 19.82 $ 24.99 $ 25.39 $ 33.11