Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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+ Details

Partnership Income, Expense and Cash Distributions MF Properties (Details) (Consolidated Properties Subject to Sale [Member], USD $)	6 Months Ended	24 Months Ended		24 Months Ended
	Jun. 30, 2010 Integer properties	Jun. 30, 2012 Series A [Member]	Jun. 30, 2010 Series A [Member]	Jun. 30, 2012 Series B [Member]	Jun. 30, 2010 Series B [Member]
Real Estate Properties [Line Items]
Number of Real Estate Properties	3
series, securities, available for sale	2
percent of return, securities, available for sale		7.00%		10.00%
Available-for-sale Securities	$ 18,300,000		$ 14,700,000		$ 3,600,000
Available-for-sale Security, Maturity Date at a point in time	Jun. 30, 2050
Available-for-Sale Securities, Asset Ownership	100.00%