Investments in Partnerships - Interests in Profits, Losses and Cash Distributions Made by Local Partnerships (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Distributions from partnerships	$ 11,211	$ 70,929
Local Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Distributions from partnerships	11,211	70,929
Amount of distributions applied to a Partnership tax liability		59,394
Cash distribution received		11,535
Number of investments with surplus cash	1	2
Aggregate surplus cash	$ 137,854	$ 402,802
Minimum [Member] | Local Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Percent interest in profits, losses and cash distributions	98.00%
Maximum [Member] | Local Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Percent interest in profits, losses and cash distributions	98.99%