Other Assets (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Other assets, net
Acquisition deposits	$ 20,000,000		$ 20,000,000	$ 3,000,000
Property and equipment, net	2,542,000		2,542,000		2,529,000
Land held for development	188,000		188,000		188,000
Intangibles, net	7,577,000		7,577,000		7,877,000
Dividends receivable	229,000		229,000
Interest rate cap derivative agreements	105,000		105,000		48,000
Cash trap receivables	4,443,000		4,443,000		8,208,000
Other receivables	4,115,000		4,115,000		4,130,000
Other	2,992,000		2,992,000		2,922,000
Total other assets, net	42,191,000		42,191,000		25,902,000
Cost basis	10,554,000		10,554,000		10,153,000
Accumulated depreciation	(8,012,000)		(8,012,000)		(7,624,000)
Amortization expense			6,421,000	9,260,000
Long term investments
Proceeds from collection of cash trap receivables	3,800,000		3,800,000
Preferred equity investment
Long term investments
Dividends on the preferred equity investment	700,000		1,200,000
Boston Park Plaza
Other assets, net
Acquisition deposits			20,000,000
BuyEfficient, LLC
Other assets, net
Intangibles, net	7,600,000		7,600,000		7,900,000
Accumulated amortization	1,500,000		1,500,000		1,200,000
Amortization expense	$ 100,000	$ 100,000	$ 300,000	$ 300,000
BuyEfficient, LLC | Maximum
Other assets, net
Useful life of intangibles			20 years
BuyEfficient, LLC | Minimum
Other assets, net
Useful life of intangibles			7 years