Owner Interest and Cost Method Investments (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Results of Operations (Unaudited)
Revenue	$ 16,049	$ 39,808	$ 75,154	$ 132,377
Net income (loss)	(2,993)	(8,765)	(15,554)	(26,579)
Equity income (loss) excluding impairments and amortization of intangible assets	(1,325)	(2,797)	(6,272)	(8,436)
Amortization of intangible assets	(283)	(448)	(875)	(1,570)
Total equity income (loss)	$ (1,608)	$ (3,245)	$ (7,147)	$ (10,006)