Significant Subsidiaries (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of Equity Method Investments [Line Items]
Percent of total assets or equity Local Partnership represents, more than 20%	20.00%
Meadow Lanes [Member]
Schedule of Equity Method Investments [Line Items]
Total Assets	$ 3,888,464	$ 3,574,383
Total Liabilities	262,557	433,329
Revenue	256,403	253,636
Net Income	$ 59,716	$ 51,518