Consolidated Statements of Partners' Capital (USD $)	Total	General Partner	Number of Units	Beneficial Unit Certificate Holders	Unallocated Deficit of Consolidated Variable Interest Entities	Noncontrolling Interest	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2008	$ 40,895,327	$ 261,785		$ 93,277,480	$ (52,711,654)	$ 67,716	$ (16,857,807)
Partners' Capital Account, Units at Dec. 31, 2008			13,512,928
Sale of Beneficial Unit Certificates, Units			8,330,000
Sale of Beneficial Unit Certificates	38,887,035			38,887,035
Noncontrolling Interest Contribution	6,329					6,329
Limited Partners Interest in Ohio Properties	0
Distributions paid or accrued
Regular Distribution, 2010 and 2011 and Distributions paid or accrued, 2009	(10,863,940)	(1,460,644)		(9,403,296)
Reclassification of Tier II Income	0	607,201		(607,201)
Net income (loss)	23,827,413	804,223		2,538,773	20,495,957	(11,540)
Unrealized Gain (Loss) on Securities	5,848,576	58,486		5,790,090			5,848,576
Balance at Dec. 31, 2009	98,600,740	271,051		130,482,881	(32,215,697)	62,505	(11,009,231)
Partners' Capital Account, Units at Dec. 31, 2009			21,842,928
Sale of Beneficial Unit Certificates, Units			8,280,000
Sale of Beneficial Unit Certificates	41,591,576			41,591,576
Deconsolidation of VIEs - Note 4	3,324,354	15,881		1,572,185	1,736,288		1,588,066
Limited Partners Interest in Ohio Properties	0
Consolidation of VIEs - Note 4	2,752,283	27,523		2,724,760			2,752,283
Distributions paid or accrued
Regular Distribution, 2010 and 2011 and Distributions paid or accrued, 2009	(12,756,581)	(127,566)		(12,629,015)
Distribution of tier II earnings - Note 2	(1,863,265)	(465,816)		(1,397,449)
Net income (loss)	(604,191)	28,532		2,037,368	(2,466,260)	(203,831)
Unrealized Gain (Loss) on Securities	(3,023,351)	(30,234)		(2,993,117)			(3,023,351)
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
Deconsolidation of VIEs - Note 4	9,996,003	(7,262)		(718,981)	10,722,246		(726,243)
Limited Partners Interest in Ohio Properties	115,352					115,352
Distributions paid or accrued
Regular Distribution, 2010 and 2011 and Distributions paid or accrued, 2009	(14,710,486)	(154,969)		(14,555,517)
Distribution of tier II earnings - Note 2	(674,596)	(168,649)		(505,947)
Net income (loss)	(1,673,163)	152,359		(1,106,742)	(1,289,539)	570,759
Unrealized Gain (Loss) on Securities	10,514,370	105,144		10,409,226			10,514,370
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