EQUITY INVESTMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
EQUITY INVESTMENTS
Investee income statement data represented in summarized information (as a percent)			100.00%
Revenue	$ 18,940	$ 17,683	$ 36,316	$ 33,982
Costs and expenses	(9,278)	(9,348)	(19,213)	(17,612)
Non-operating expense	(3,498)	(2,984)	(6,120)	(6,121)
Net income	$ 6,164	$ 5,351	$ 10,983	$ 10,249