Segment Reporting Segment Reporting (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Revenues [Abstract]
Total revenues	$ 14,927,956	$ 12,506,625
Interest Expense [Abstract]
Interest expense	4,770,135	3,936,176
Depreciation [Abstract]
Depreciation expense	1,646,231	1,454,179
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	2,531,688	2,499,160
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	2,531,700	2,524,479
Assets
Total assets	874,452,838		$ 867,110,483
Available-for-sale Securities [Member]
Revenues [Abstract]
Total revenues	9,074,195	7,318,561
Interest Expense [Abstract]
Interest expense	3,784,390	2,889,120
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	2,317,325	2,349,522
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	2,317,337	2,349,522
Assets
Total assets	875,819,690		849,226,911
MF Properties [Member]
Revenues [Abstract]
Total revenues	5,074,104	4,302,301
Interest Expense [Abstract]
Interest expense	670,333	712,899
Depreciation [Abstract]
Depreciation expense	1,646,231	1,454,179
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(267,803)	(394,532)
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	(267,803)	(393,641)
Assets
Total assets	139,905,856		141,704,103
Public Housing Capital Fund Trusts [Member]
Revenues [Abstract]
Total revenues	730,902	732,903
Interest Expense [Abstract]
Interest expense	300,720	296,460
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	430,182	429,148
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	430,182	429,148
Assets
Total assets	60,920,496		61,021,462
MBS Securities Investments [Member]
Revenues [Abstract]
Total revenues	48,755	152,860
Interest Expense [Abstract]
Interest expense	14,692	37,697
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	51,984	115,022
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	51,984	115,022
Assets
Total assets			15,035,061
Consolidation, Eliminations [Member]
Assets
Total assets	$ (202,193,204)		$ (199,877,054)
Discontinued Operations [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)		$ 24,428