INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2013 |
|
| Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract] | |||
| Statutory rate | 35.00% | 35.00% | 35.00% |
| Stock-based compensation | 0.60% | 0.40% | 0.80% |
| State tax expense | 0.10% | 0.00% | 0.70% |
| Tax rate differential, foreign income | (23.20%) | (25.30%) | (24.20%) |
| Federal research and development credits | (1.10%) | (0.30%) | (0.40%) |
| Other permanent items | (0.40%) | (0.70%) | 0.40% |
| Effective tax rate | 11.00% | 9.10% | 12.30% |