Investments in Bonds (Details) (USD $)	12 Months Ended																															12 Months Ended					12 Months Ended			12 Months Ended									12 Months Ended			12 Months Ended										12 Months Ended						12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012 Arbors at Hickory Ridge [Member]	Dec. 31, 2013 Arbors at Hickory Ridge [Member]		Dec. 31, 2013 Ashley Square [Member]		Dec. 31, 2012 Ashley Square [Member]		Dec. 31, 2013 Autumn Pines [Member]		Dec. 31, 2012 Autumn Pines [Member]		Dec. 31, 2013 Avistar at the Oaks [Member]		Dec. 31, 2013 Avistar in 09 [Member]		Dec. 31, 2013 Avistar on the Hills [Member]		Dec. 31, 2013 Bella Vista [Member]		Dec. 31, 2012 Bella Vista [Member]		Dec. 31, 2013 Bridle Ridge [Member]		Dec. 31, 2012 Bridle Ridge [Member]		Dec. 31, 2013 Brookstone [Member]		Dec. 31, 2012 Brookstone [Member]		Dec. 31, 2013 Copper Gate [Member]	Dec. 31, 2013 Cross Creek [Member]		Dec. 31, 2012 Cross Creek [Member]		Dec. 31, 2012 Iona Lakes [Member]	Dec. 31, 2013 Lake Forest [Member]		Dec. 31, 2013 Rennaisance [Member]	Dec. 31, 2013 Runnymede [Member]		Dec. 31, 2012 Runnymede [Member]		Dec. 31, 2013 Southpark [Member]		Dec. 31, 2012 Southpark [Member]		Dec. 31, 2013 The Palms at Premier Park [Member]	Dec. 31, 2013 The Suites on Paseo [Member]		Dec. 31, 2013 Tyler Park Apartments [Member]	Dec. 31, 2013 Vantage at Harlingen [Member]	Dec. 31, 2013 Vantage at Judson [Member]	Dec. 31, 2012 Vantage at Judson [Member]	Mar. 31, 2014 Lost Creek [Member]		Dec. 31, 2013 Lost Creek [Member]		Dec. 31, 2012 Lost Creek [Member]		Dec. 31, 2013 Westside Village Market [Member]	Dec. 31, 2012 Woodland Park [Member]	Dec. 31, 2013 Woodlynn Village [Member]		Dec. 31, 2012 Woodlynn Village [Member]		Dec. 31, 2013 Series B [Member] Avistar at Chase Hill [Member]	Mar. 31, 2013 Series B [Member] Avistar at Chase Hill [Member]	Dec. 31, 2013 Series B [Member] Avistar at the Crest [Member]	Mar. 31, 2013 Series B [Member] Avistar at the Crest [Member]	Dec. 31, 2013 Series B [Member] Avistar on the Boulevard [Member]	Mar. 31, 2013 Series B [Member] Avistar on the Boulevard [Member]	Dec. 31, 2013 Series B [Member] Greens of Pine Glen [Member]	Dec. 31, 2013 Series B [Member] Ohio Properties [Member]	Dec. 31, 2013 Series B [Member] Tyler Park Apartments [Member]	Dec. 31, 2013 Series B [Member] Westside Village Market [Member]	Dec. 31, 2013 Series A [Member] Avistar at Chase Hill [Member]		Mar. 31, 2013 Series A [Member] Avistar at Chase Hill [Member]	Dec. 31, 2013 Series A [Member] Avistar at the Crest [Member]		Mar. 31, 2013 Series A [Member] Avistar at the Crest [Member]	Dec. 31, 2013 Series A [Member] Avistar on the Boulevard [Member]		Mar. 31, 2013 Series A [Member] Avistar on the Boulevard [Member]	Dec. 31, 2013 Series A [Member] Greens of Pine Glen [Member]		Dec. 31, 2013 Series A [Member] Ohio Properties [Member]		Jun. 30, 2013 Series A [Member] Rennaisance [Member]	Dec. 31, 2013 Series A [Member] Tyler Park Apartments [Member]	Dec. 31, 2013 Series A [Member] Westside Village Market [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Held in Trust	$ 219,511,490	$ 88,257,386		$ 11,576,209	[1]	$ 5,212,000	[2]	$ 5,260,000	[2]	$ 12,147,873	[1]	$ 12,217,004	[1]	$ 8,354,000	[1]	$ 7,192,000	[1]	$ 5,389,000	[1]	$ 6,545,000	[2]	$ 6,600,000	[2]	$ 7,715,000	[2]	$ 7,765,000	[2]	$ 7,463,641	[2]	$ 7,453,246	[2]		$ 6,042,297	[2]	$ 6,004,424	[2]		$ 8,997,000	[2]		$ 10,525,000	[2]	$ 10,605,000	[2]	$ 11,878,885	[1]	$ 11,904,968	[2]		$ 35,750,000	[1]					$ 15,900,000	[2]	$ 15,883,084	[2]	$ 15,987,744	[2]			$ 4,426,000	[2]	$ 4,460,000	[2]											$ 8,960,000	[1]		$ 8,759,000	[1]		$ 13,760,000	[1]		$ 8,437,501	[1]	$ 14,498,000	[2]
Cost adjusted for pay-downs	71,040,881	48,827,485	11,581,485																													5,220,000					15,535,000			7,975,000									20,152,000			8,100,000	6,692,000	6,049,000	6,049,000							5,400,000	15,662,000					2,005,000		1,700,000		3,216,000		948,291	3,583,590
Unrealized Gain, held in trust	5,309,545	11,277,142		225,690	[1]	0	[2]	246,981	[2]	0	[1]	953,024	[1]	0	[1]	0	[1]	0	[1]	0	[2]	93,324	[2]	0	[2]	108,632	[2]	841,751	[2]	1,459,408	[2]		1,480,266	[2]	1,994,911	[2]		0	[2]		0	[2]	491,330	[2]	1,018,750	[2]	2,462,350	[2]		0	[1]							1,743,088	[2]	3,467,182	[2]			0	[2]	0	[2]											0	[1]		0	[1]		0	[1]		0	[1]	0	[2]
Unrealized Gain	340,453	1,165,695	610,785																													0					554,910			0									0			0	0	0	0							0	0					0		0		0		189,589	150,864
Unrealized Loss, held in trust	(8,449,234)	(446)		0	[1]	0	[2]	0	[2]	(195,355)	[1]	0	[1]	(1,103,115)	[1]	(588,254)	[1]	(417,724)	[1]	(473,989)	[2]	0	[2]	(452,870)	[2]	0	[2]	0	[2]	0	[2]		0	[2]	0	[2]		(289,461)	[2]		(551,510)	[2]	0	[2]	0	[2]	0	[2]		(2,502)	[1]							0	[2]	0	[2]			(340,979)	[2]	(446)	[2]											(850,752)	[1]		(1,298,785)	[1]		(1,306,512)	[1]		(577,426)	[1]	0	[2]
Unrealized Loss	(2,434,964)	(4,289,886)	0																													(252,648)					0			(16,964)									(283,942)			(526,601)	(211,735)	(190,423)	(847)							(403,400)	(4,289,039)					(159,117)		(134,912)		(255,222)		0	0
Estimated Fair Value, held in trust	216,371,801	99,534,082		11,801,899	[1]	5,212,000	[2]	5,506,981	[2]	11,952,518	[1]	13,170,028	[1]	7,250,885	[1]	6,603,746	[1]	4,971,276	[1]	6,071,011	[2]	6,693,324	[2]	7,262,130	[2]	7,873,632	[2]	8,305,392	[2]	8,912,654	[2]		7,522,563	[2]	7,999,335	[2]		8,707,539	[2]		9,973,490	[2]	11,096,330	[2]	12,897,635	[2]	14,367,318	[2]		35,747,498	[1]							17,626,172	[2]	19,454,926	[2]			4,085,021	[2]	4,459,554	[2]											8,109,248	[1]		7,460,215	[1]		12,453,488	[1]		7,860,075	[1]	14,498,000	[2]
Estimated Fair Value	$ 68,946,370	$ 45,703,294	$ 12,192,270																													$ 4,967,352					$ 16,089,910			$ 7,958,036									$ 19,868,058			$ 7,573,399	$ 6,480,265	$ 5,858,577	$ 6,048,153							$ 4,996,600	$ 11,372,961					$ 1,845,883	$ 2,000,000	$ 1,565,088	$ 17,000,000	$ 2,960,778	$ 3,200,000	$ 1,137,880	$ 3,734,454	$ 2,000,000	$ 1,400,000			$ 9,000,000			$ 8,800,000			$ 13,800,000					$ 8,600,000	$ 6,100,000	$ 4,000,000

[1] Bond held by Deutsche Bank in a secured financing transaction, Note 11

[2] Bonds owned by ATAX TEBS I, LLC, Note 11