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SHARE-BASED COMPENSATION: (Tables) | 6 Months Ended
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Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of option activity | Stock option activity for the six months ended September 30, 2018 was:
|  |  |  |  |  | Weighted-average |  |
|  |  |  | Weighted-average |  | remaining |  | Aggregate
|  | Number of |  | exercise price |  | contractual term |  | Intrinsic value
|  | shares |  | per share |  | (in years) |  | (in thousands)
Outstanding at March 31, 2018 |  | 2,456,184 |  | $ | 13.30 |  |  |  |
Exercised |  | (273,009) |  | $ | 9.59 |  |  |  | $ | 7,144
Forfeited or canceled |  | (18,646) |  | $ | 19.07 |  |  |  |
Outstanding at September 30, 2018 |  | 2,164,529 |  | $ | 13.72 |  | 4.9 |  | $ | 75,248
Exercisable at September 30, 2018 |  | 1,951,500 |  | $ | 14.43 |  | 4.7 |  | $ | 66,462
Summary of stock options outstanding and exercisable | A summary of stock options outstanding and exercisable as of September 30, 2018 was:
|  |  |  |  |  | Options outstanding |  |  |  |  |  | Options exercisable |  |
Range of |  |  |  |  |  |  |  | Weighted-average |  | Weighted-average |  |  |  | Weighted-average
exercise price |  |  |  |  |  | Options |  | remaining |  | exercise price |  | Options |  | exercise price
per share |  |  |  |  |  | outstanding |  | contractual life |  | per share |  | exercisable |  | per share
$ | 0.61 |  | — |  | $ | 9.99 |  | 478,039 |  | 5.4 years |  | $ | 1.37 |  | 341,363 |  | $ | 1.35
$ | 10.00 |  | — |  | $ | 19.99 |  | 1,043,507 |  | 4.1 years |  | $ | 14.62 |  | 967,154 |  | $ | 14.39
$ | 20.00 |  | — |  | $ | 24.99 |  | 636,293 |  | 5.9 years |  | $ | 21.31 |  | 636,293 |  | $ | 21.31
$ | 25.00 |  | — |  | $ | 32.85 |  | 6,690 |  | 5.1 years |  | $ | 32.85 |  | 6,690 |  | $ | 32.85
|  |  |  |  |  | 2,164,529 |  | 4.9 years |  | $ | 13.72 |  | 1,951,500 |  | $ | 14.43
Schedule of performance stock option unit activity | Performance stock option unit activity for the six months ended September 30, 2018 was:
|  |  |  |  |  | Weighted-average |  |
|  |  |  | Weighted-average |  | remaining |  | Aggregate
|  | Number |  | exercise price |  | contractual term |  | intrinsic value
|  | of shares |  | per share |  | (in years) |  | (in thousands)
Outstanding at March 31, 2018 |  | 322,823 |  | $ | 21.42 |  |  |  |
Forfeited or canceled |  | (186,090) |  | $ | 21.41 |  |  |  |
Outstanding at September 30, 2018 |  | 136,733 |  | $ | 21.44 |  | 1.6 |  | $ | 3,698
Exercisable at September 30, 2018 |  | — |  | $ | — |  | — |  | $ | —
Schedule of time-vesting restricted stock unit activity | Time-vesting restricted stock unit activity for the six months ended September 30, 2018 was:
|  |  |  | Weighted-average |  |
|  |  |  | fair value per |  | Weighted-average
|  | Number |  | share at grant |  | remaining contractual
|  | of shares |  | date |  | term (in years)
Outstanding at March 31, 2018 |  | 2,702,497 |  | $ | 24.60 |  | 2.34
Granted |  | 1,383,409 |  | $ | 29.15 |  |
Vested |  | (745,573) |  | $ | 23.94 |  |
Forfeited or canceled |  | (200,222) |  | $ | 25.18 |  |
Outstanding at September 30, 2018 |  | 3,140,111 |  | $ | 26.73 |  | 2.71
Schedule of non-vested performance-based restricted stock units activity | Non-vested performance-based restricted stock unit activity for the six months ended September 30, 2018 was:
|  |  |  | Weighted-average |  |
|  |  |  | fair value per |  | Weighted-average
|  | Number |  | share at grant |  | remaining contractual
|  | of shares |  | date |  | term (in years)
Outstanding at March 31, 2018 |  | 561,018 |  | $ | 25.58 |  | 1.67
Granted |  | 186,539 |  | $ | 31.07 |  |
Forfeited or canceled |  | (110,536) |  | $ | 25.08 |  |
Outstanding at September 30, 2018 |  | 637,021 |  | $ | 27.28 |  | 1.56
Schedule of other performance unit activity | Other performance-based stock unit activity for the six months ended September 30, 2018 was:
|  |  |  | Weighted-average |  |
|  |  |  | fair value per |  | Weighted-average
|  | Number |  | share at grant |  | remaining contractual
|  | of shares |  | date |  | term (in years)
Outstanding at March 31, 2018 |  | 111,111 |  | $ | 5.33 |  | -
Vested |  | (45,364) |  | $ | 5.33 |  |
Forfeited or canceled |  | (65,747) |  | $ | 5.33 |  |
Outstanding at September 30, 2018 |  | — |  | $ | — |  | -

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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