Investment In Affiliates , Schedule of Investments (Details) (Origen Financial [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Origen Financial [Member]
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 15,845	$ 17,729
Total expenses	(18,657)	(21,088)
Net loss	$ (2,812)	$ (3,359)