FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2012

FAIR VALUE OF FINANCIAL INSTRUMENTS

Schedule of carrying amount and estimated fair value of financial instruments

	2012				2011
	Fair value		Carrying amount		Fair value		Carrying amount
	(in thousands)
Financial assets
Collateral Security account	$	3,164	$	3,164	$	3,163	$	3,163
Financial liabilities
Fixed rate debentures	$	2,190	$	1,636	$	2,195	$	1,651
Other long-term liabilities		—		—		103		103
Line of credit		99,500		99,500		89,500		89,500

Schedule of assets and liabilities, including both current and non-current portions, measured at fair value on a recurring basis

December 31, 2012	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Restricted investments in US Treasury Bonds—available for sale, at fair value	$	1,415	$	—	$	—	$	1,415

	Level 1		Level 2		Level 3		Total
	(in thousands)
Liabilities
Commodity derivatives	$	—	$	952	$	—	$	952

December 31, 2011	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Restricted investments in US Treasury Bonds—available for sale, at fair value	$	1,349	$	—	$	—	$	1,349
Commodity derivatives	$	—	$	309	$	—	$	309

	Level 1		Level 2		Level 3		Total
	(in thousands)
Liabilities
Commodity derivatives	$	—	$	980	$	—	$	980