Investments in Partnerships - Interests in Profits, Losses, and Cash Distributions (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Cash distributions	$ 774,234	$ 415,550
Local Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Cash distributions	774,234	415,550
Number of local partnerships with aggregate surplus cash	2	3
Aggregate surplus cash	$ 586,793	$ 864,504
Minimum [Member] | Local Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Percent interest in profits, losses, and cash distributions	96.00%
Maximum [Member] | Local Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Percent interest in profits, losses, and cash distributions	98.99%