Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2013	Dec. 31, 2012
Assets [Abstract]
Cash and cash equivalents	$ 13,336,312	$ 30,172,773
Restricted cash	4,595,649	5,471,522
Interest receivable	10,851,898	8,473,360
Tax-exempt mortgage revenue bonds held in trust, at fair value	130,391,760	99,534,082
Tax-exempt mortgage revenue bonds, at fair value	76,467,415	45,703,294
Public housing capital fund trusts, at fair value	64,613,713	65,389,298
Available-for-sale Securities, Fair Value Disclosure, Mortgage-backed Securities	34,115,328	32,121,412
Real estate assets:
Land	11,221,298	11,202,876
Buildings and improvements	96,004,727	93,615,479
Real estate assets before accumulated depreciation	107,226,025	104,818,355
Accumulated depreciation	(20,519,236)	(19,330,063)
Net real estate assets	86,706,789	85,488,292
Other assets	11,004,379	8,216,295
Assets of discontinued operations	9,963,239	32,580,427
Total assets	442,046,482	413,150,755
Liabilities [Abstract]
Accounts payable, accrued expenses and other liabilities	5,445,866	5,013,947
Distribution payable	5,400,621	5,566,908
Debt financing	194,267,900	177,948,000
Mortgages payable	46,558,021	39,119,507
Liabilities of discontinued operations	115,668	1,531,462
Total Liabilities	251,788,076	229,179,824
Commitments and Contingencies
Partners' Capital
General Partner	69,728	(430,087)
Beneficial Unit Certificate holders	214,252,021	207,383,087
Unallocated deficit of Consolidated VIEs	(25,276,767)	(25,035,808)
Total Partners' Capital	189,044,982	181,917,192
Noncontrolling interest	1,213,424	2,053,739
Total Capital	190,258,406	183,970,931
Total Liabilities and Partners' Capital	$ 442,046,482	$ 413,150,755

This element represents the portion of the balance sheet assertion valued at fair value by the entity, which is held in trust, whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may by ued in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all sescuritized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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