Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net Income (loss)	$ (1,673,163)	$ (604,191)	$ 23,827,413
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation and amortization expense	5,691,639	5,062,817	6,067,330
Asset impairment charge - Weatherford	0	2,528,852	0
Provision for loan loss	4,242,571	562,385	1,401,731
Provision for loss on receivables	952,700	0	0
Non-cash loss (gain) on derivatives	2,083,521	(571,684)	830,142
Bond discount accretion	(481,225)	(464,560)	0
Gain on bond retirement and asset sold	(463,461)	0	0
Debt forgiveness	(104,988)	0	0
Gain on early extinquishment of debt	0	(435,395)	0
Gain on assets held for sale	0	0	(862,865)
Gain on sale of discontinued operations	0	0	(26,514,809)
Changes in operating assets and liabilities, net of effect of acquisitions
Increase in interest receivable	(1,575,860)	(2,740,834)	(223,980)
Decrease (increase) in other assets	1,137,626	(1,213,333)	(3,902,841)
Increase (decrease) in accounts payable and accrued expenses and other liabilities	419,940	76,836	(961,475)
Net cash provided (used) by operating activities	10,229,300	2,200,893	(339,354)
Cash flows from investing activities:
Acquisition of tax-exempt mortgage revenue bonds	(20,917,500)	(28,195,363)	(19,271,328)
Acquisition of partnerships, net of cash acquired	(24,779,613)	0	(7,886,852)
Proceeds from bond retirement	11,067,524	0	0
Principal payments received on tax-exempt and taxable mortgage revenue bonds	1,023,709	547,094	212,667
Principle payments received on taxable loans	4,528,137	0	0
Capital expenditures	(14,081,507)	(1,641,480)	(1,989,065)
Increase in restricted cash	(281,275)	36,031	22,977
Proceeds from assets sold	36,500	0	0
Restricted cash - debt collateral released (paid)	6,677,529	(15,409,293)	7,870,980
Change in restricted cash - Ohio sale	2,684,876	(2,684,876)	0
Cash released upon foreclosure	2,235,335	0	0
Transfer of cash to unconsolidated VIE upon deconsolidation	(5,135)	(88,949)	0
Transfer of cash from consolidated VIE upon consolidation	0	1,979	0
Acquisition of asset held for sale	0	0	(2,649,991)
Proceeds from assets held for sale	0	0	3,512,856
Proceeds from sale of discontinued operations	0	0	32,000,000
Investments in other assets	0	(1,115,000)	0
Net cash used by investing activities	(31,811,420)	(48,549,857)	11,822,244
Cash flows from financing activities:
Distributions paid	(15,277,141)	(13,574,391)	(10,538,321)
Decrease (increase) in liabilities related to restricted cash	281,275	(36,031)	(22,977)
Proceeds from debt financing	58,599,571	95,810,000	55,500,000
Debt financing costs	(338,903)	(3,903,782)	(550,912)
Principal payments on debt financing and mortgage payable	(14,861,669)	(74,600,810)	(83,993,840)
Sale of LP interests - Ohio Properties	115,352	0	0
Loan extension payment	0	(246,485)	0
Derivative settlements	0	0	(238,980)
Acquisition of interest rate cap agreements	0	(2,694,600)	(605,500)
Sale of Beneficial Unit Certificates	0	41,591,576	38,887,035
Net cash provided by financing activities	28,518,485	42,345,477	(1,563,495)
Net increase (decrease) in cash and cash equivalents	6,936,365	(4,003,487)	9,919,395
Cash and cash equivalents at beginning of period	13,277,048	17,280,535	7,361,140
Cash and cash equivalents at end of period	20,213,413	13,277,048	17,280,535
Supplemental Cash Flow Information:
Cash paid during the period for interest	3,580,562	2,487,421	4,431,099
Distributions declared but not paid	3,911,340	3,803,399	2,757,945
Cash received for sale of MF Properties eliminated in consolidation (Note 6)	0	16,192,000	0
Cash paid for purchase of tax exempt mortgage revenue bond eliminated in consolidation (Note 4)	0	(18,313,000)	0
Cash paid for taxable loan eliminated in consolidation (Note 5)	0	(1,236,236)	0
Capital expenditures financed through notes payables	8,949,253	95,646	51,616
Liabilities assumed in the acquisition of partnerships	$ 0	$ 0	$ 6,506,329