SHARE-BASED COMPENSATION: (Details 2) (USD $) | 6 Months Ended |
Sep. 30, 2014 |
Stock options outstanding and exercisable by exercise price range | ' |
Options outstanding (in shares) | 5,796,746 |
Options outstanding - Weighted-average remaining contractual life | '5 years 3 months 29 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $14.42 |
Options exercisable (in shares) | 3,373,001 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $18.18 |
Range of exercise price per share from $0.63 to $8.90 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $0.63 |
Exercise price per share, high end of range (in dollars per share) | $8.90 |
Options outstanding (in shares) | 1,464,856 |
Options outstanding - Weighted-average remaining contractual life | '7 years 9 months 15 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $1.56 |
Options exercisable (in shares) | 183,530 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $2.64 |
Range of exercise price per share from $11.08 to $14.42 | ' |
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) | $14.42 |
Options outstanding (in shares) | 1,719,118 |
Options outstanding - Weighted-average remaining contractual life | '5 years 9 months 4 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $13.21 |
Options exercisable (in shares) | 1,195,887 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $13.10 |
Range of exercise price per share from $15.10 to $19.76 | ' |
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) | $19.76 |
Options outstanding (in shares) | 686,167 |
Options outstanding - Weighted-average remaining contractual life | '1 year 11 months 12 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $16.38 |
Options exercisable (in shares) | 686,167 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $16.38 |
Range of exercise price per share from $20.44 to $25.00 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $20.44 |
Exercise price per share, high end of range (in dollars per share) | $25 |
Options outstanding (in shares) | 1,588,894 |
Options outstanding - Weighted-average remaining contractual life | '4 years 10 months 24 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $22.32 |
Options exercisable (in shares) | 989,258 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $22.95 |
Range of exercise price per share from $26.33 to $29.30 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $26.33 |
Exercise price per share, high end of range (in dollars per share) | $29.30 |
Options outstanding (in shares) | 114,530 |
Options outstanding - Weighted-average remaining contractual life | '9 months 15 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $27.94 |
Options exercisable (in shares) | 114,530 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $27.94 |
Range of exercise price per share from $32.85 to $35.16 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $32.85 |
Exercise price per share, high end of range (in dollars per share) | $35.16 |
Options outstanding (in shares) | 91,259 |
Options outstanding - Weighted-average remaining contractual life | '2 years 6 months 11 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $34.45 |
Options exercisable (in shares) | 71,707 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $34.88 |
Range of exercise price per share from $41.38 to $62.06 | ' |
Stock options outstanding and exercisable by exercise price range | ' |
Exercise price per share, low end of range (in dollars per share) | $41.38 |
Exercise price per share, high end of range (in dollars per share) | $62.06 |
Options outstanding (in shares) | 131,922 |
Options outstanding - Weighted-average remaining contractual life | '10 months 17 days |
Options outstanding - Weighted-average exercise price per share (in dollars per share) | $41.83 |
Options exercisable (in shares) | 131,922 |
Options exercisable - Weighted-average exercise price per share (in dollars per share) | $41.83 |