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STOCK-BASED COMPENSATION - NON-OPTIONS (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Other stock-based compensation |  |  |
Contractual term of awards | 10 years |  |
Minimum |  |  |
Other stock-based compensation |  |  |
Continuous service period for awards to vest | 1 year |  |
Maximum |  |  |
Other stock-based compensation |  |  |
Continuous service period for awards to vest | 3 years |  |
Stock appreciation rights |  |  |
Non-vested other than stock options, number of shares |  |  |
Outstanding at the beginning of the period (in shares) | 252,886 |  |
Granted (in shares) | 72,860 |  |
Exercised (in shares) | (144,360) |  |
Forfeited (in shares) | (5,787) |  |
Outstanding at the end of the period (in shares) | 175,599 | 252,886 |
Exercisable at the end of the period (in shares) | 53,886 |  |
Other than stock options, weighted-average grant date fair value |  |  |
Non-vested at the beginning of the period (in dollars per share) | $ 75.60 |  |
Granted (in dollars per share) | 78.06 |  |
Exercised (in dollars per share) | 71.99 |  |
Forfeited (in dollars per share) | 87.42 |  |
Non-vested at the end of the period (in dollars per share) | 79.20 | $ 75.60 |
Exercisable at the end of the period (in dollars per share) | $ 73.46 |  |
Other than stock options, weighted-average remaining contractual life (in years) |  |  |
Outstanding at the end of the period | 8 years |  |
Exercisable at the end of the period | 6 years 9 months 18 days |  |
Aggregate Intrinsic Value |  |  |
Intrinsic value on outstanding shares | $ 4,090 |  |
Intrinsic value on exercisable shares | $ 1,565 |  |
Other stock-based compensation |  |  |
Fair value granted (in dollars per share) | $ 26.37 | $ 29.17 | $ 29.76
Total intrinsic value | $ 2,800 | $ 6,400 | $ 200
Unrecognized compensation expense | $ 1,900 |  |
Weighted-average vesting period (years) | 1 year 8 months 12 days |  |
Restricted stock |  |  |
Non-vested other than stock options, number of shares |  |  |
Outstanding at the beginning of the period (in shares) | 144,783 |  |
Granted (in shares) | 43,460 |  |
Vested (in shares) | (39,297) |  |
Forfeited (in shares) | (5,977) |  |
Outstanding at the end of the period (in shares) | 142,969 | 144,783 |
Other than stock options, weighted-average grant date fair value |  |  |
Non-vested at the beginning of the period (in dollars per share) | $ 72.94 |  |
Granted (in dollars per share) | 77.96 |  |
Vested (in dollars per share) | 62.32 |  |
Forfeited (in dollars per share) | 78.95 |  |
Non-vested at the end of the period (in dollars per share) | $ 77.13 | $ 72.94 |
Other stock-based compensation |  |  |
Unrecognized compensation expense | $ 4,700 |  |
Weighted-average vesting period (years) | 3 years |  |
Restricted stock | Officers and Certain Employees |  |  |
Non-vested other than stock options, number of shares |  |  |
Granted (in shares) | 32,840 |  |
Other stock-based compensation |  |  |
Vesting period | 3 years |  |
Holding period of awards as a vesting condition | 2 years |  |
Vesting (as a percent) | 33.00% |  |
Restricted stock | Non Executive Directors |  |  |
Non-vested other than stock options, number of shares |  |  |
Granted (in shares) | 10,620 |  |
Other stock-based compensation |  |  |
Vesting period | 1 year |  |
Vesting (as a percent) | 50.00% |  |
Percentage of shares granted to non-executive directors, vesting one year after date of grant | 50.00% |  |
Performance stock |  |  |
Non-vested other than stock options, number of shares |  |  |
Outstanding at the beginning of the period (in shares) | 184,664 |  |
Granted (in shares) | 59,820 |  |
Vested (in shares) | (21,953) |  |
Forfeited (in shares) | (7,716) |  |
Non-attainment (in shares) | (59,793) |  |
Outstanding at the end of the period (in shares) | 155,022 | 184,664 |
Other than stock options, weighted-average grant date fair value |  |  |
Non-vested at the beginning of the period (in dollars per share) | $ 61.75 |  |
Granted (in dollars per share) | 62.77 |  |
Vested (in dollars per share) | 38.12 |  |
Forfeited (in dollars per share) | 76.01 |  |
Non-attainment (in dollars per share) | 52.48 |  |
Non-vested at the end of the period (in dollars per share) | $ 68.35 | $ 61.75 |
Other stock-based compensation |  |  |
Unrecognized compensation expense | $ 1,600 |  |
Weighted-average vesting period (years) | 1 year 10 months 24 days |  |
Continuous service period for awards to vest | 3 years |  |
Earn out basis if no goals are met (as a percent) | 0.00% |  |
Earn out basis if some goals are met (as a percent) | 100.00% |  |
Earn out basis if all goals are met (as a percent) | 200.00% |  |
Performance stock | Vesting upon achievement of annual growth in Net GEOs |  |  |
Other stock-based compensation |  |  |
Vesting (as a percent) | 50.00% |  |
Performance stock | Vesting upon achievement of annual growth in Net TSR |  |  |
Other stock-based compensation |  |  |
Vesting (as a percent) | 50.00% |  |
Gold Equivalent Ounces Shares |  |  |
Other stock-based compensation |  |  |
Contractual term of awards | 5 years |  |
Total Shareholder Return Shares |  |  |
Other stock-based compensation |  |  |
Fair value granted (in dollars per share) | $ 47.37 |  |
Contractual term of awards | 3 years |  |
Continuous service period for awards to vest | 3 years |  |

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