Non-Recourse and Limited Recourse Debt (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Long-term Debt, by Maturity
2012 (remainder)	$ 8,871
2013	33,467
2014	35,230
2015	65,005
2016	287,118
Thereafter through 2031	928,819
Long-term Debt	1,358,510
Unamortized Discount	(780)
Total	$ 1,357,730	$ 1,154,254