Equity Investments (Details 7) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
ASSETS
Cash and cash equivalents	$ 97,682	$ 40,952	$ 45,257	$ 66,493
TOTAL ASSETS	923,163	733,933
LIABILITIES AND MEMBERS CAPITAL
TOTAL LIABILITIES AND EQUITY	923,163	733,933
Loan and Other Equity Investments [Member]
ASSETS
Cash and cash equivalents	2,201	796
Real estate debt investments	260,652	223,902
Securities available for sale	95,994	103,518
Receivables and other assets	2,223	3,512
Other assets	27,790	27,988
TOTAL ASSETS	388,860	359,716
LIABILITIES AND MEMBERS CAPITAL
Non-recourse secured financings	275,880	306,634
Other current liabilities	3,233	1,645
Other liabilities	33,905	36,788
Members' Capital	75,842	14,649
TOTAL LIABILITIES AND EQUITY	388,860	359,716
Carrying value of the Trust's investments in the equity investments	$ 21,447	$ 9,187