FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair value
Financial assets
Collateral security account	$ 2,812	$ 3,165
Financial liabilities
Fixed rate debentures	3,045	3,035
Senior Notes	110,597	195,000
Contingent Earn-Out	6,800	6,530
Carrying amount
Financial assets
Collateral security account	2,812	3,165
Financial liabilities
Fixed rate debentures	1,636	1,636
Senior Notes	227,586	296,053
Contingent Earn-Out	6,800	6,530
The "Credit Facility" | Fair value
Financial liabilities
Line of credit		134,749
The "Credit Facility" | Carrying amount
Financial liabilities
Line of credit		$ 134,749
The "First Lien Credit Facility" | Fair value
Financial liabilities
Line of credit	219,665
The "First Lien Credit Facility" | Carrying amount
Financial liabilities
Line of credit	$ 219,665