FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair value
Financial assets
Collateral security account	$ 3,165	$ 3,164
Financial liabilities
Fixed rate debentures	2,072	2,190
Line of credit	89,500	99,500
Carrying amount
Financial assets
Collateral security account	3,165	3,164
Financial liabilities
Fixed rate debentures	1,636	1,636
Line of credit	$ 89,500	$ 99,500