Discontined Operations Discontinued Operations Narrative (Details) (USD $)						12 Months Ended															6 Months Ended
	Feb. 28, 2013 properties	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Eagle Ridge [Member]	Dec. 31, 2011 Eagle Ridge [Member]	Dec. 31, 2012 Greens of Pine Glen [Member]	Sep. 30, 2012 Greens of Pine Glen [Member]	Dec. 31, 2011 Greens of Pine Glen [Member]	Sep. 30, 2012 churchland [Member]	Dec. 31, 2011 churchland [Member]	Dec. 31, 2012 Ohio Properties [Member]	Dec. 31, 2011 Ohio Properties [Member] limited	Dec. 31, 2012 Boston Capital Limited Partners [Member] Greens of Pine Glen [Member] limited	Sep. 30, 2012 Boston Capital Limited Partners [Member] Greens of Pine Glen [Member] limited	Dec. 31, 2012 Boston Capital Limited Partners [Member] Ohio Properties [Member] limited	Dec. 31, 2011 Boston Capital Limited Partners [Member] Ohio Properties [Member] limited	Feb. 28, 2013 Series A [Member]	Dec. 31, 2012 Series A [Member] Greens of Pine Glen [Member]	Feb. 28, 2013 Series B [Member]	Dec. 31, 2012 Series B [Member] Greens of Pine Glen [Member]	Jun. 30, 2010 Segment, Discontinued Operations [Member] Consolidated Properties [Member] Ohio Properties [Member] properties	Dec. 31, 2011 Segment, Discontinued Operations [Member] Consolidated Properties [Member] Ohio Properties [Member] properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Limited Partners												3	2	2	2	2
Limited Partners' Contributed Capital						$ 961,000	$ 961,000					$ 6,300,000
Limited Partner Contribution promise						2,200,000						6,700,000
Available-for-Sale Securities, Asset Ownership						100.00%
Debt Instrument, Interest Rate, Stated Percentage	9.00%																6.00%	6.50%	9.00%	12.00%
Available-for-sale Securities, at Par Value		146,806,203	145,907,502			9,500,000												8,515,000		950,000
Available-for-sale Security, Maturity Date at a point in time						Oct. 01, 2047															Jun. 01, 2050
Loans Payable						850,000
Construction Completion, Percentage						75.00%
Property, Plant and Equipment, Net					2,300,000	8,400,000		6,000,000		6,500,000
Assets of Disposal Group, Including Discontinued Operation		32,580,427	37,494,700	2,500,000	2,300,000	12,200,000		6,200,000		7,300,000
Number of Real Estate Properties	3																				3	3
business disposal, sales price				2,500,000		7,300,000			8,100,000
Significant Acquisitions and Disposals, Gain (Loss) on Sale or Disposal, Net of Tax				126,000					1,300,000
Property, Plant and Equipment, Net		85,488,292	75,268,934								18,600,000	20,800,000
Property, Plant and Equipment, Gross		$ 104,818,355	$ 90,574,865								$ 20,400,000	$ 21,600,000