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STOCK-BASED COMPENSATION: (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018
Stock Option Activity - Number of Shares |  |  |
Outstanding at beginning of the period (in shares) | 2,456,184 |  |
Exercised (in shares) | (870,453) |  |
Forfeited or cancelled (in shares) | (25,591) |  |
Outstanding at end of the period (in shares) | 1,560,140 |  |
Exercisable at the end of the period (in shares) | 1,378,721 |  |
Weighted-average exercise price per share |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ 13.30 |  |
Exercised (in dollars per share) | 11.22 |  |
Forfeited or cancelled (in dollars per share) | 18.64 |  |
Outstanding at the end of the period (in dollars per share) | 14.37 |  |
Exercisable at the end of the period (in dollars per share) | $ 15.27 |  |
Weighted-average remaining contractual term |  |  |
Weighted average remaining contractual term | 4 years 9 months 18 days |  |
Exercisable at the end of the period | 4 years 6 months |  |
Aggregate intrinsic value |  |  |
Exercised | $ 27,517 |  |
Outstanding at the end of the period | 37,850 |  |
Exercisable at the end of the period | $ 32,210 |  |
Stock Option and Equity Compensation Plans |  |  |
Share-based compensation |  |  |
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares) |  | 42,300,000 | 37,300,000
Shares which remained available for future grants (in shares) | 12,300,000 |  |
Amended and Restated 2005 Equity Compensation Plan |  |  |
Share-based compensation |  |  |
Shares which remained available for future grants (in shares) | 37,900,000 | 32,900,000 |

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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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