SHARE-BASED COMPENSATION: (Details 2) (USD $) | 6 Months Ended |
Sep. 30, 2013 |
Stock options outstanding and exercisable by exercise price range | ' |
Options outstanding (in shares) | 7,141,654 |
Options outstanding - Weighted-average remaining contractual life | '3 years 6 months 22 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $21.11 |
Options exercisable (in shares) | 5,987,849 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $22.18 |
Range of exercise price per share from $6.32 to $9.62 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $6.32 |
Exercise price per share, high end of range (in dollars per share) | $9.62 |
Options outstanding (in shares) | 48,480 |
Options outstanding - Weighted-average remaining contractual life | '3 years 11 months 8 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $8.57 |
Options exercisable (in shares) | 48,480 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $8.57 |
Range of exercise price per share from $11.08 to $15.00 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $11.08 |
Exercise price per share, high end of range (in dollars per share) | $15 |
Options outstanding (in shares) | 2,070,966 |
Options outstanding - Weighted-average remaining contractual life | '6 years 2 months 1 day |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $13.07 |
Options exercisable (in shares) | 1,217,776 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $12.78 |
Range of exercise price per share from $15.10 to $19.82 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $15.10 |
Exercise price per share, high end of range (in dollars per share) | $19.82 |
Options outstanding (in shares) | 1,134,853 |
Options outstanding - Weighted-average remaining contractual life | '2 years 7 months 24 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $16.51 |
Options exercisable (in shares) | 1,125,071 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $16.50 |
Range of exercise price per share from $20.12 to $25.00 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $20.12 |
Exercise price per share, high end of range (in dollars per share) | $25 |
Options outstanding (in shares) | 2,082,859 |
Options outstanding - Weighted-average remaining contractual life | '3 years 8 months 16 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $22.83 |
Options exercisable (in shares) | 1,792,026 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $23.05 |
Range of exercise price per share from $25.98 to $29.30 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $25.98 |
Exercise price per share, high end of range (in dollars per share) | $29.30 |
Options outstanding (in shares) | 1,010,218 |
Options outstanding - Weighted-average remaining contractual life | '11 months 26 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $26.74 |
Options exercisable (in shares) | 1,010,218 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $26.74 |
Range of exercise price per share from $30.93 to $39.12 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $30.93 |
Exercise price per share, high end of range (in dollars per share) | $39.12 |
Options outstanding (in shares) | 616,600 |
Options outstanding - Weighted-average remaining contractual life | '9 months 14 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $35.96 |
Options exercisable (in shares) | 616,600 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $35.96 |
Range of exercise price per share from $40.88 to $62.06 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $40.88 |
Exercise price per share, high end of range (in dollars per share) | $62.06 |
Options outstanding (in shares) | 177,678 |
Options outstanding - Weighted-average remaining contractual life | '1 year 6 months |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $43.74 |
Options exercisable (in shares) | 177,678 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $43.74 |