Investments in Unconsolidated Real Estate Partnerships (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financial information for the unconsolidated real estate partnerships
Real estate, net of accumulated depreciation	$ 88,014	$ 107,419	$ 429,780
Total assets	93,242	114,658	472,904
Non-recourse property debt and other notes payable	60,660	122,019	321,236
Total liabilities	64,859	132,767	455,591
Partners’ capital (deficit)	28,383	(18,109)	17,313
Rental and other property revenues	16,268	72,636	114,974
Property operating expenses	(8,470)	(49,331)	(75,934)
Depreciation and amortization	(3,300)	(18,388)	(26,323)
Interest expense	(4,185)	(21,354)	(27,108)
Gain on sale and impairment losses, net	(36,212)	4,140	(22,598)
Net income (loss)	$ 35,909	$ (21,108)	$ 6,773