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STOCK BASED COMPENSATION - Option activity for company's stock incentive plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Number of Shares, Beginning Balance | 3,614,262 | 3,347,445 | 6,171,707 |
Number of Shares, Granted |  | 683,500 | 161,000 |
Number of Shares, Exercised | (849,635) | (266,558) | (2,885,470) |
Number of Shares, Forfeitures and Cancellations | (107,485) | (150,125) | (99,792) |
Number of Shares, Ending Balance | 2,657,142 | 3,614,262 | 3,347,445 | 6,171,707
Number of Shares, Vested and expected to vest as of June 30, 2013 | 2,635,599 |  |  |
Number of Shares, Vested and exercisable as of June 30, 2013 | 2,233,533 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] |  |  |  |
Options Outstanding, Weighted Average Exercise Price, Beginning Balance, USD per share | $ 3.07 | $ 1.45 | $ 0.72 |
Options, Granted, Weighted Average Exercise Price, USD per share |  | $ 11.29 | $ 10.44 |
Options, Exercised, Weighted Average Exercise Price, USD per share | $ 2.46 | $ 2.39 | $ 0.28 |
Options, Forfeitures and Cancellations, Weighted Average Exercise Price, USD per share | $ 10.55 | $ 5.68 | $ 4.71 |
Options Outstanding, Weighted Average Exercise Price, Ending Balance, USD per share | $ 2.96 | $ 3.07 | $ 1.45 | $ 0.72
Options, Weighted Average Exercise Price, Vested and expected to vest, Ending Balance, USD per share | $ 2.89 |  |  |
Options, Weighted Average Exercise Price, Vested and exercisable, Ending Balance, USD per share | $ 1.60 |  |  |
Options outstanding, Weighted Average Remaining Contractual Term, Ending Balance | 5 years 1 month 10 days | 6 years 2 months 1 day | 6 years 7 months 13 days | 6 years 5 months 9 days
Options, Remaining Contractual Term, Vested and expected to vest, Ending Balance | 5 years 1 month 2 days |  |  |
Options, Weighted Average Remaining Contractual Term, Vested and exercisable, Ending Balance | 4 years 6 months 22 days |  |  |
Options outstanding, Intrinsic Value, Ending Balance | $ 112,215 | $ 52,330 | $ 42,920 | $ 43,135
Options, Aggregate Intrinsic Value, Vested and expected to vest, Ending Balance | 111,482 |  |  |
Options, Aggregate Intrinsic Value, Vested and exercisable, Ending Balance | $ 97,363 |  |  |

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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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=6415400&loc=d3e5070-113901 Reference 2: 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)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&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=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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