Condensed Consolidated Statements of Partners' Capital (USD $)	Total USD ($)	General Partner USD ($)	Number of Units	Beneficial Unit Certificate Holders USD ($)	Unallocated Deficit of Consolidated VIEs USD ($)	Noncontrolling Interest USD ($)	Accumulated Other Comprehensive Income (Loss) USD ($)
Balance at Dec. 31, 2010	$ 128,021,565	$ (280,629)		$ 161,389,189	$ (32,945,669)	$ (141,326)	$ (9,692,233)
Partners' Capital Account, Units at Dec. 31, 2010			30,122,928
Proceeds from Noncontrolling Interests	0
Distributions paid or accrued	(3,803,400)	(38,034)		(3,765,366)
Net income (loss)	1,371,235	14,693		1,454,610	(280,129)	182,061
Unrealized gain on securities	2,855,558	28,556		2,827,002			2,855,558
Balance at Mar. 31, 2011	128,444,958	(275,414)		161,905,435	(33,225,798)	40,735	(6,836,675)
Partners' Capital Account, Units at Mar. 31, 2011			30,122,928
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
Proceeds from Noncontrolling Interests	4,037					4,037
Distributions paid or accrued	(3,803,400)	(38,034)		(3,765,366)
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			2,847,607
Balance at Mar. 31, 2012	$ 131,406,873	$ (354,861)		$ 154,826,581	$ (23,752,821)	$ 687,974	$ 2,943,501
Partners' Capital Account, Units at Mar. 31, 2012			30,122,928