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NONVESTED STOCK AWARDS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Unrecognized compensation cost of related to nonvested stock awards
Unrecognized compensation cost	$ 1,431
Weighted-average period for recognition of unrecognized compensation cost	2 years 4 months 28 days
General, administrative and technical management fees
NONVESTED STOCK AWARDS
Recognized nonvested stock amortization expense	$ 464	$ 572

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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