FAIR VALUE MEASUREMENTS (Details) - Recurring basis $ in Thousands	Mar. 31, 2017 USD ($)
Carrying Amount
Liabilities:
Debt	$ 418,753
Amount of equity component of convertible notes	77,000
Fair Value
Assets:
Total assets	7,364
Liabilities:
Debt	390,472
Total liabilities	390,472
Level 1
Assets:
Total assets	4,152
Liabilities:
Debt	390,472
Total liabilities	390,472
Level 2
Assets:
Total assets	3,212
Marketable equity Securities | Carrying Amount
Assets:
Marketable equity securities	4,152
Marketable equity Securities | Fair Value
Assets:
Marketable equity securities	4,152
Marketable equity Securities | Level 1
Assets:
Marketable equity securities	4,152
Warrants | Carrying Amount
Assets:
Warrants	3,212
Warrants | Fair Value
Assets:
Warrants	3,212
Warrants | Level 2
Assets:
Warrants	$ 3,212