Investments In and Advances to Partnerships - Property Matters (Details) (USD $)	6 Months Ended		0 Months Ended	6 Months Ended	0 Months Ended		6 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 19, 2002 Baltic Plaza [Member]	Jun. 30, 2013 Baltic Plaza [Member]	Apr. 03, 2013 Shallowford Oaks [Member]	Apr. 29, 2013 Affiliate of SP Baltic Plaza, LP [Member]	Jun. 30, 2013 CRICO Housing Partnership [Member]	Apr. 29, 2013 CRICO Housing Partnership [Member] Affiliate of SP Baltic Plaza, LP [Member]	Jun. 30, 2013 C.R.H.C. of Atlantic City, Inc [Member]	Apr. 29, 2013 C.R.H.C. of Atlantic City, Inc [Member] Affiliate of SP Baltic Plaza, LP [Member]
Schedule of Equity Method Investments [Line Items]
Cash proceeds from sale			$ 2,053,358
Purchase money note term (in years)			30 years
Purchase money note, principal amount			2,300,000
Interest rate				4.60%
Minimum annual payment, percent of maker/purchaser's annual audited cash flow				50.00%
Beneficial interest in purchase money note				98.00%
Discounted original principal balance plus estimated accrued interest				619,000
Note Receivable, Sale Price	2,000,000
Proceeds received from sale of note	1,960,000	0				1,960,000		39,800		200
Interest in note receivable							1.99%		0.01%
Liquidation distribution					$ 6,928