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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |
Stock-based compensation expense | $ 5.8 | $ 13.5
Deferred tax benefit | $ 2.2 | $ 5.1
Estimated effective income tax rate | 38.00% | 38.00%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized stock-based compensation related to non-vested awards | $ 50.9 |
Amortization period of unrecognized stock-based compensation | 2 years 2 months 12 days |
2013 Equity Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number common stock awards authorized (in shares) | 11,260,783 |
Number of shares available for grant | 4,601,849 |
Outstanding, aggregate intrinsic value | $ 10.3 |
Outstanding and exercisable, intrinsic value | 9.9 |
Expected to vest, intrinsic value | 0.5 |
Outstanding, intrinsic value | 0.4 |
Restricted stock | 2013 Equity Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized stock-based compensation related to non-vested awards | $ 12.3 |
Amortization period of unrecognized stock-based compensation | 2 years 2 months 12 days |
Restricted stock | Employee |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Award vesting period | 3 years |
Restricted stock | Director |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Award vesting period | 1 year |
Performance share awards | 2013 Equity Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized stock-based compensation related to non-vested awards | $ 25.2 |
Amortization period of unrecognized stock-based compensation | 2 years 3 months 2 days |
Award vesting period | 3 years |
Stock options | 2013 Equity Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized stock-based compensation related to non-vested awards | $ 13.4 |
Amortization period of unrecognized stock-based compensation | 2 years 26 days |
Award vesting period | 3 years |
Award term | 10 years |
Options, expiration period | 12 months |
Year One | Stock options | 2013 Equity Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Award vesting rights percentage | 33.33% |
Year Two | Stock options | 2013 Equity Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Award vesting rights percentage | 33.33% |
Year Three | Stock options | 2013 Equity Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Award vesting rights percentage | 33.33% |

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