Schedule III - Real Estate and Accumulated Depreciation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Balance at January 1	$ 58,856,688	$ 68,589,778	$ 67,383,413
Current year depreciation expense	6,930,145	5,726,319	6,005,270
Disposition of real estate	(350,094)	(15,459,409)	(4,798,905)
Balance at December 31	$ 65,436,739	$ 58,856,688	$ 68,589,778