Segment Reporting Segment Reporting (Details) - USD ($)		3 Months Ended									12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015		Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Revenues [Abstract]
Total revenues											$ 58,978,750	$ 59,953,291		$ 41,941,023
Interest Expense [Abstract]
Interest expense											15,469,639	14,826,217		11,165,911
Depreciation [Abstract]
Depreciation expense											5,980,483	5,888,973		4,801,533
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (loss) from continuing operations		$ 5,623,293	$ 4,622,874	$ 11,005,829	$ 2,531,688	$ 10,115,987		$ 2,286,383	$ 7,983,295	$ 2,499,160	23,783,684	22,884,825		14,976,415
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)		5,623,335	$ 4,623,542	$ 11,005,930	$ 2,531,700	13,322,624		$ 2,540,649	$ 8,221,271	$ 2,524,479	23,784,507	26,609,023		15,033,861
Assets
Total assets		944,113,674				867,110,483	[1]				944,113,674	867,110,483	[1]
Mortgage Revenue Bond Investments Segment [Member]
Revenues [Abstract]
Total revenues											36,673,232	38,772,872		23,227,674
Interest Expense [Abstract]
Interest expense											11,904,616	10,787,252		7,147,092
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (loss) from continuing operations											11,755,639	17,924,037		13,181,961
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)											11,755,639	17,924,037		13,181,961
Assets
Total assets		764,995,675				658,846,881	[1]				764,995,675	658,846,881	[1]
MF Properties [Member]
Revenues [Abstract]
Total revenues											17,404,439	17,789,125		14,250,572
Interest Expense [Abstract]
Interest expense											2,200,531	2,659,350		2,319,928
Depreciation [Abstract]
Depreciation expense											5,980,483	5,888,973		4,801,533
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (loss) from continuing operations											8,442,704	2,964,297		(938,151)
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)											8,443,527	2,967,098		(933,478)
Assets
Total assets		129,895,112				141,704,103	[1]				129,895,112	141,704,103	[1]
Public Housing Capital Fund Trusts [Member]
Revenues [Abstract]
Total revenues											2,888,035	2,994,482		3,038,819
Interest Expense [Abstract]
Interest expense											1,349,800	1,221,713		1,295,238
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (loss) from continuing operations											1,538,234	1,758,022		1,714,968
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)											1,538,234	1,758,022		1,714,968
Assets
Total assets		57,461,268				61,021,462	[1]				57,461,268	61,021,462	[1]
MBS Securities Investments [Member]
Revenues [Abstract]
Total revenues											17,921	225,890		1,423,958
Interest Expense [Abstract]
Interest expense											14,692	157,902		403,653
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (loss) from continuing operations											51,984	67,547		1,017,637
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)											51,984	67,547		1,017,637
Assets
Total assets	[1]					15,035,061						15,035,061
Other Investments [Member]
Revenues [Abstract]
Total revenues											1,995,123	170,922
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income (loss) from continuing operations											1,995,123	170,922
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)											1,995,123	170,922
Assets
Total assets		34,540,280				7,726,970	[1]				34,540,280	7,726,970	[1]
Discontinued Operations [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Operating Income (Loss)												3,721,397		$ 52,773
Consolidation, Eliminations [Member]
Assets
Total assets		$ (42,778,661)				$ (17,223,994)	[1]				$ (42,778,661)	$ (17,223,994)	[1]

[1] The Partnership has reduced the reported assets of the Mortgage Revenue Bond Investments segment and the consolidation and eliminations amount by approximately $182.7 million to eliminate intercompany activity within the Mortgage Revenue Bond Investments segment.