FAIR VALUE MEASUREMENTS (Details) - Recurring basis $ in Thousands	Sep. 30, 2016 USD ($)
Carrying Amount
Liabilities:
Debt	$ 412,908
Amount of equity component of convertible notes	77,000
Fair Value
Assets:
Total assets	3,244
Liabilities:
Debt	418,322
Total liabilities	418,322
Level 1
Liabilities:
Debt	418,322
Total liabilities	418,322
Level 2
Assets:
Total assets	3,244
Warrants | Carrying Amount
Assets:
Warrants	3,244
Warrants | Fair Value
Assets:
Warrants	3,244
Warrants | Level 2
Assets:
Warrants	$ 3,244