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STOCK-BASED COMPENSATION - OSI Plans (Details) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Employee Stock Purchase Plan |  |  |
Stock-based Compensation |  |  |
Shares purchased | 80,115 | 71,314 | 60,375
Shares available for grant | 741,690 |  |
Employee Stock Purchase Plan | Maximum |  |  |
Stock-based Compensation |  |  |
Discount rate for eligible employees to purchase common stock (as a percent) | 15.00% |  |
2006 Plan |  |  |
Stock-based Compensation |  |  |
Number of awards issued (in shares) | 0 |  |
Shares |  |  |
Granted (in shares) | 0 |  |
OSI Plans | Stock options |  |  |
Stock-based Compensation |  |  |
Vesting period | 3 years |  |
Weighted average assumptions used to determine the fair value calculations for stock options issued |  |  |
Risk-free interest rate (as percent) | 1.90% | 1.70% | 1.40%
Expected volatility (as percent) | 29.00% | 33.00% | 31.00%
Expected holding period (in years) | 4 years 6 months | 4 years 6 months | 4 years 6 months
Number of Options |  |  |
Outstanding at the beginning of the period (in shares) | 780,671 | 934,112 | 1,012,650
Granted (in shares) | 25,379 | 19,176 | 35,162
Exercised (in shares) | (121,651) | (168,564) | (107,059)
Expired or forfeited (in shares) | (6,874) | (4,053) | (6,641)
Outstanding at the end of the period (in shares) | 677,525 | 780,671 | 934,112
Exercisable at the end of the period (in shares) | 635,160 |  |
Weighted-Average Exercise Price |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ 30.00 | $ 28.67 | $ 27.30
Granted (in dollars per share) | 85.83 | 73.42 | 73.42
Exercised (in dollars per share) | 23.53 | 26.68 | 28.05
Expired or forfeited (in dollars per share) | 73.77 | 68.28 | 66.56
Outstanding at the end of the period (in dollars per share) | 32.80 | 30.00 | 28.67
Exercisable at the end of the period (in dollars per share) | $ 29.62 |  |
Weighted-Average Remaining Contractual Term |  |  |
Outstanding at the end of the period | 2 years 10 months 24 days |  |
Exercisable at the end of the period | 2 years 6 months |  |
Aggregate Intrinsic Value |  |  |
Outstanding at the end of the period | $ 30,364,000 |  |
Exercisable at the end of the period | $ 30,301,000 |  |
Stock-based compensation, other disclosures |  |  |
Weighted-average grant-date fair value of stock options (in dollars per share) | $ 23.64 | $ 22.19 | $ 20.66
Total intrinsic value of options exercised | $ 6,295,000 |  |
OSI Plans | Nonqualified options | Minimum | Any person who owned more than 10% of the voting power of all classes of stock |  |  |
Stock-based Compensation |  |  |
Percentage of voting power owned | 10.00% |  |
Purchase price expressed as a percentage of the fair market value of the Company's common stock on the date of grant | 110.00% |  |
OSI Plans | Incentive stock options | Minimum | Any person who owned more than 10% of the voting power of all classes of stock |  |  |
Stock-based Compensation |  |  |
Percentage of voting power owned | 10.00% |  |
Purchase price expressed as a percentage of the fair market value of the Company's common stock on the date of grant | 110.00% |  |
OSI Plans | Restricted stock and RSU |  |  |
Shares |  |  |
Nonvested at the beginning of the period (in shares) | 611,687 | 530,498 | 659,906
Granted (in shares) | 351,034 | 379,888 | 337,628
Vested (in shares) | (413,639) | (299,277) | (417,896)
Net replacement RSUs (in Shares) |  | 20,953 |
Forfeited (in shares) | (22,705) | (20,375) | (49,140)
Nonvested at the end of the period (in shares) | 526,377 | 611,687 | 530,498
Weighted-Average Fair Value |  |  |
Nonvested at the beginning of the period (in dollars per share) | $ 65.85 | $ 67.94 | $ 63.75
Granted (in dollars per share) | 74.09 | 64.55 | 72.90
Vested (in dollars per share) | 65.33 | 67.87 | 65.36
Net replacement RSUs ( in dollar per share) |  | 67.76 |
Forfeited (in dollars per share) | 70.32 | 68.34 | 67.70
Nonvested at the end of the period (in dollars per share) | $ 71.56 | $ 65.85 | $ 67.94
Total fair value of shares vested | $ 27,000,000 | $ 23,200,000 | $ 27,300,000
OSI Plans | Restricted stock and RSU | Minimum |  |  |
Stock-based Compensation |  |  |
Vesting period | 3 years |  |
OSI Plans | Restricted stock and RSU | Maximum |  |  |
Stock-based Compensation |  |  |
Vesting period | 4 years |  |
OSI Plans | Performance-based restricted stock units |  |  |
Shares |  |  |
Granted (in shares) | 117,346 | 156,836 | 139,300
OSI Plans | Performance-based restricted stock units | Minimum |  |  |
Weighted-Average Fair Value |  |  |
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the Company's common stock | 0.00% |  |
OSI Plans | Performance-based restricted stock units | Maximum |  |  |
Weighted-Average Fair Value |  |  |
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the Company's common stock | 250.00% |  |
2012 Plan |  |  |
Stock-based Compensation |  |  |
Shares available for grant | 2,300,000 |  |
2012 Plan | Restricted stock and RSU |  |  |
Weighted-Average Fair Value |  |  |
Number of shares available for grant reduced for each award granted | 1.87 |  |
Number of shares available for grant increased for each award forfeited and returned | 1.87 |  |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued through business acquisitions during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References No definition available. + Details
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- Definition Discount rate from fair value on purchase date that participants pay for shares. + 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 equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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 (f)(2)(iv) -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 The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable 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)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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=96867065&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=96867065&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 The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + 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=96867065&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=96867065&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=96867065&loc=d3e5070-113901 + Details
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