FAIR VALUE MEASUREMENTS (Details) - Recurring basis $ in Thousands	Jun. 30, 2017 USD ($)
Carrying Amount
Assets:
Warrants	$ 2,194
Liabilities:
Debt	421,749
Amount of equity component of convertible notes	77,000
Fair Value
Assets:
Warrants	2,194
Total assets	2,194
Liabilities:
Debt	400,029
Total liabilities	400,029
Level 1
Liabilities:
Debt	400,029
Total liabilities	400,029
Level 2
Assets:
Warrants	2,194
Total assets	$ 2,194