Debt Financing Total Debt Financing (Details) - USD ($)		3 Months Ended		12 Months Ended
		Mar. 31, 2017		Dec. 31, 2016
Short Term Debt [Line Items]
Debt financing		$ 598,123,706		$ 495,383,033
Period End Rates		3.98%		3.83%
TOB & Term A/B Trusts Securitization [Member] | Fixed - Term TOB [Member]
Short Term Debt [Line Items]
Debt financing		$ 46,846,532		$ 46,860,699
Years Acquired		2014		2014
Reset Frequency		N/A		N/A
TOB & Term A/B Trusts Securitization [Member] | Fixed - Term TOB [Member] | Minimum [Member]
Short Term Debt [Line Items]
Stated Maturities		2017-07		2017-07
Period End Rates		4.01%		4.01%
TOB & Term A/B Trusts Securitization [Member] | Fixed - Term TOB [Member] | Maximum [Member]
Short Term Debt [Line Items]
Stated Maturities		2019-07		2019-07
Period End Rates		4.39%		4.39%
TOB & Term A/B Trusts Securitization [Member] | Fixed - Term A/B [Member]
Short Term Debt [Line Items]
Debt financing		$ 275,162,869		$ 171,778,950
Restricted Cash		$ 1,247,698		$ 1,373,695
Years Acquired				2016
Reset Frequency		N/A		N/A
TOB & Term A/B Trusts Securitization [Member] | Fixed - Term A/B [Member] | Minimum [Member]
Short Term Debt [Line Items]
Years Acquired		2016
Stated Maturities		2017-03		2017-03
Period End Rates		3.64%		3.64%
TOB & Term A/B Trusts Securitization [Member] | Fixed - Term A/B [Member] | Maximum [Member]
Short Term Debt [Line Items]
Years Acquired		2017
Stated Maturities		2027-02		2026-12
Period End Rates		4.46%		4.56%
TOB & Term A/B Trusts Securitization [Member] | Variable - TOB [Member]
Short Term Debt [Line Items]
Debt financing		$ 42,455,000		$ 42,455,000
Years Acquired		2012		2012
Stated Maturities		2017-06		2016-12
Reset Frequency		Weekly		Weekly
Facility Fees		1.62%		1.62%
TOB & Term A/B Trusts Securitization [Member] | Variable - TOB [Member] | Minimum [Member]
Short Term Debt [Line Items]
SIFMA Based Rates		1.48%		1.29%
Period End Rates		3.10%		2.91%
TOB & Term A/B Trusts Securitization [Member] | Variable - TOB [Member] | Maximum [Member]
Short Term Debt [Line Items]
SIFMA Based Rates		1.56%		1.39%
Period End Rates		3.18%		3.01%
TEBS Financings [Member] | Variable - TEBS I [Member]
Short Term Debt [Line Items]
Debt financing		$ 60,404,699		$ 60,430,991
Restricted Cash		$ 52,065		$ 396,412
Years Acquired		2010		2010
Stated Maturities		2017-09	[1]	2017-09
Reset Frequency		Weekly		Weekly
SIFMA Based Rates		0.97%		0.77%
Facility Fees		1.85%		1.85%
Period End Rates		2.82%		2.62%
TEBS Financings [Member] | Variable - TEBS II [Member]
Short Term Debt [Line Items]
Debt financing	[2]	$ 91,226,919		$ 91,768,081
Restricted Cash	[2]	$ 171,322		$ 170,988
Years Acquired	[2]	2014		2014
Stated Maturities	[2]	2019-07		2019-07
Reset Frequency	[2]	Weekly		Weekly
SIFMA Based Rates	[2]	0.95%		0.75%
Facility Fees	[2]	1.67%		1.62%
Period End Rates	[2]	2.62%		2.37%
TEBS Financings [Member] | Variable - TEBS III [Member]
Short Term Debt [Line Items]
Debt financing	[2]	$ 82,027,687		$ 82,089,312
Restricted Cash	[2]	$ 3,483,665		$ 3,495,592
Years Acquired	[2]	2015		2015
Stated Maturities	[2]	2020-07		2020-07
Reset Frequency	[2]	Weekly		Weekly
SIFMA Based Rates	[2]	0.95%		0.75%
Facility Fees	[2]	1.44%		1.39%
Period End Rates	[2]	2.39%		2.14%

[1] ATAX TEBS I, LLC, a wholly-owned subsidiary of the Partnership, may terminate the M24 TEBS Financing at its option on either September 15, 2017 or September 15, 2020. Should the Partnership not elect to terminate the M24 TEBS Financing on these dates, the full term of the M24 TEBS Financing will run through the final principal payment date associated with the securitized bonds, or July 15, 2050.

[2] Facility fees are variable