Other Assets Narrative Tagging (Details) (USD $)	12 Months Ended												12 Months Ended			12 Months Ended			6 Months Ended			3 Months Ended	12 Months Ended							6 Months Ended	12 Months Ended							12 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 The Palms at Premier Park [Member] Unit	Dec. 31, 2013 Ashley Square [Member]		Dec. 31, 2012 Ashley Square [Member]		Dec. 31, 2013 Cross Creek [Member]	Dec. 31, 2012 Cross Creek [Member]		Dec. 31, 2013 Foundation for Affordable Housing [Member] Unit	Dec. 31, 2013 Greens of Pine Glen [Member]	Dec. 31, 2012 Greens of Pine Glen [Member]	Dec. 31, 2013 Ohio Properties [Member]	Dec. 31, 2013 Prairiebrook Village [Member]	Dec. 31, 2009 Prairiebrook Village [Member]	Dec. 31, 2013 Vantage at Harlingen [Member] Unit	Jun. 30, 2013 Woodland Park [Member]	Sep. 30, 2013 Woodland Park [Member]	Dec. 31, 2012 Woodland Park [Member]	Sep. 30, 2013 Iona Lakes [Member]	Dec. 31, 2013 Iona Lakes [Member]	Dec. 31, 2012 Iona Lakes [Member]		Dec. 31, 2011 Iona Lakes [Member]	Dec. 31, 2013 Vantage at Judson [Member]	Dec. 31, 2012 Vantage at Judson [Member] Unit		Jun. 30, 2012 Arbors at Hickory Ridge [Member] Unit	Dec. 31, 2013 Arbors at Hickory Ridge [Member]		Dec. 31, 2012 Arbors at Hickory Ridge [Member]		Dec. 31, 2013 Series D [Member] Vantage at Harlingen [Member]	Dec. 31, 2012 Series D [Member] Vantage at Judson [Member]	Dec. 31, 2013 Series C [Member] Vantage at Harlingen [Member]	Dec. 31, 2013 Series C [Member] Avistar Portolio-2 [Member]	Mar. 31, 2013 Series C [Member] Avistar Portfolio [Member]	Dec. 31, 2013 Series C [Member] Avistar Portfolio [Member]	Dec. 31, 2012 Series C [Member] Vantage at Judson [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]
Discount Rate for Impairment Analysis																																										6.30%	7.40%
Asset Held For Sale Valuation				$ 1,100,000												$ 375,000
Number of Units in Real Estate Property				240								96						288										288		348
Advances to Affiliate					184,000		108,000		233,000	150,000			26,000		42,000									402,000
Repayments of Other Debt										330,000
Property loan receivable, gross	21,549,927	20,328,927			5,078,342		4,894,342		6,821,087	6,588,087		1,603,083	876,000		2,361,447						914,116			7,741,118						600,000	191,264		191,264
Debt Instrument, Interest Rate, Stated Percentage				6.25%	6.25%	[1]	6.25%	[2]		6.15%	[2]	9.00%						9.00%		2.80%				6.90%	[2]		9.00%	9.00%	[1]	7.98%	6.25%	[2]	6.25%	[1]	9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Available-for-sale Security, Maturity Date at a point in time				Jan. 01, 2050	Dec. 01, 2025	[1]	Dec. 01, 2025	[2]		Mar. 01, 2049	[2]		Oct. 01, 2047	Oct. 01, 2047				Oct. 01, 2053						Apr. 01, 2030	[2]		Feb. 01, 2053	Feb. 01, 2053	[1]	Apr. 01, 2026	Dec. 01, 2049	[2]	Dec. 01, 2049	[1]	Oct. 01, 2053			Sep. 01, 2050	Apr. 01, 2050	Apr. 01, 2050
Allowance for Loan and Lease Losses, Write-offs	(1,278,124)	0	0																1,300,000
Available-for-sale Securities, at Par Value	299,841,918	146,806,203		20,152,000	5,212,000	[1]	5,260,000	[2]		8,568,409	[2]		9,500,000					6,692,000						15,535,000	[2]		6,049,000	6,049,000	[1]	10,000,000	11,450,000	[2]	11,450,000	[1]	1,283,000	934,000	6,700,000	831,000	804,000	804,000	6,000,000
Provision for Loan and Lease Losses	241,698	452,700	952,700						200,000							711,000	700,000									4,200,000
Proceeds from Sale of Available-for-sale Securities	21,935,343	31,872,522	11,067,524																			21,900,000	21,900,000
Contingent Interest Income	6,497,160	0	309,990																			6,500,000	6,500,000
Mortgage Loans on Real Estate, Write-down or Reserve, Amt	$ (4,557,741)	$ 0	$ 0																			$ 4,600,000	$ 4,600,000

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

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