Investment in Unconsolidated Entities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues	$ 4,561	$ 3,768	$ 9,175	$ 7,509
Expenses:
Operating expenses	2,527	2,139	5,083	4,121
Interest expense	1,362	1,465	2,699	2,944
Depreciation and amortization	1,214	1,115	2,421	2,238
Net income (loss)	(542)	(951)	(1,028)	(1,794)
Company's share of net income (loss) (1)	(54)	(340)	(114)	(635)
Income on preferred investments	156	56	312	109
Equity in earnings (loss) of unconsolidated entities	$ 102	$ (284)	$ 198	$ (526)