FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financial liabilities
Other long-term liabilities	$ 26	$ 103
Fair value
Financial assets
Collateral security account	3,164	3,163
Financial liabilities
Fixed rate debentures	2,207	2,195
Other long-term liabilities	26	103
Line of credit	99,500	89,500
Carrying amount
Financial assets
Collateral security account	3,164	3,163
Financial liabilities
Fixed rate debentures	1,636	1,651
Other long-term liabilities	26	103
Line of credit	$ 99,500	$ 89,500