Condensed Consolidated Statements of Partners' Capital (USD $)	Total	General Partner	Number of Units	Beneficial Unit Certificate Holders	Unallocated Deficit of Consolidated VIEs	Noncontrolling Interest	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2011							$ 95,894
Distributions paid or accrued							0
Unrealized gain on securities							2,800,619
Balance at Jun. 30, 2012
Balance at Dec. 31, 2011	131,589,045	(354,006)		154,911,228	(23,512,962)	544,785	95,894
Partners' Capital Account, Units at Dec. 31, 2011			30,122,928
Sale of Limited Partner Interest in Multi-Family Properties	4,037	0		0	0	4,037
Distributions paid or accrued	(3,803,400)	(38,034)		(3,765,366)	0	0	0
Net income (loss)	769,584	8,703		861,588	(239,859)	139,152	0
Unrealized gain on securities	2,847,607	28,476		2,819,131	0	0	2,847,607
Balance at Mar. 31, 2012
Balance at Dec. 31, 2012	183,970,931	(430,087)		207,383,087	(25,035,808)	2,053,739	7,161,381
Partners' Capital Account, Units at Dec. 31, 2012			42,772,928
Deconsolidation of Discontinued Operations	393,401	14,064		1,392,303		(1,012,966)	1,406,367
Distributions paid or accrued	(5,400,622)	(54,006)		(5,346,616)	0	0
Net income (loss)	8,494,077	511,751		8,050,634	(240,959)	172,651	0
Unrealized gain on securities	2,800,619	28,006		2,772,613	0	0
Balance at Mar. 31, 2013	$ 190,258,406	$ 69,728		$ 214,252,021	$ (25,276,767)	$ 1,213,424	$ 11,368,367