Segment Reporting Segment Reporting (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Revenues [Abstract]
Total revenues	$ 14,933,121	$ 13,702,105	$ 29,852,980	$ 26,208,730
Interest Expense [Abstract]
Interest expense	4,322,054	2,993,134	9,092,189	6,929,310
Depreciation [Abstract]
Depreciation expense	1,649,891	1,389,700	3,296,122	2,843,879
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income from continuing operations	11,005,829	7,983,295	13,537,517	10,482,455
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	11,005,930	8,221,271	13,537,630	10,745,750
Assets
Total assets	945,688,913		945,688,913		$ 867,110,483
Available-for-sale Securities [Member]
Revenues [Abstract]
Total revenues	8,790,823	8,678,337	17,569,877	15,996,898
Interest Expense [Abstract]
Interest expense	3,391,149	2,010,745	7,175,539	4,899,865
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income from continuing operations	2,220,622	4,256,767	4,250,903	6,606,289
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	2,220,723	4,256,767	4,251,016	6,606,289
Assets
Total assets	941,641,883		941,641,883		841,499,941
MF Properties [Member]
Revenues [Abstract]
Total revenues	4,994,868	4,086,061	10,068,972	8,388,362
Interest Expense [Abstract]
Interest expense	596,360	640,909	1,266,693	1,353,808
Depreciation [Abstract]
Depreciation expense	1,649,891	1,389,700	3,296,122	2,843,879
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income from continuing operations	7,972,322	3,138,054	7,704,519	2,743,522
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	7,972,322	3,137,743	7,704,519	2,744,102
Assets
Total assets	107,534,611		107,534,611		127,683,544
Public Housing Capital Fund Trusts [Member]
Revenues [Abstract]
Total revenues	722,990	784,846	1,453,892	1,517,749
Interest Expense [Abstract]
Interest expense	334,545	300,580	635,265	597,040
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income from continuing operations	388,445	476,813	818,627	905,961
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	388,445	476,813	818,627	905,961
Assets
Total assets	62,488,641		62,488,641		61,021,462
MBS Securities Investments [Member]
Revenues [Abstract]
Total revenues		152,861	48,755	305,721
Interest Expense [Abstract]
Interest expense		40,900	14,692	78,597
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income from continuing operations		111,661	51,984	226,683
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)		111,661	51,984	226,683
Assets
Total assets					15,035,061
Other Investments [Member]
Revenues [Abstract]
Total revenues	424,440		711,484
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income from continuing operations	424,440		711,484
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)	424,440		711,484
Assets
Total assets	17,009,944		17,009,944		7,726,970
Discontinued Operations [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)		$ 238,287		$ 262,715
Assets
Total assets	13,745,698		13,745,698		14,020,559
Consolidation, Eliminations [Member]
Assets
Total assets	$ (196,731,864)		$ (196,731,864)		$ (199,877,054)