FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Assets:
Marketable equity securities	$ 6,273	$ 9,608
Recurring basis | Carrying Amount
Assets:
Marketable equity securities	6,273
Liabilities:
Debt	399,110
Amount of equity component of convertible notes	77,000
Recurring basis | Fair Value
Assets:
Marketable equity securities	6,273
Total assets	6,273
Liabilities:
Debt	379,664
Total liabilities	379,664
Recurring basis | Level 1
Assets:
Marketable equity securities	6,273
Total assets	6,273
Liabilities:
Debt	379,664
Total liabilities	$ 379,664