Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended	12 Months Ended
Dec. 31, 2011 Unit	Dec. 31, 2011 Unit
Real Estate
Proceeds from sale of property classified as held-for-sale		11,370,000
Gain on sale of investment classified as held-for-sale		430,000
Lealand Place
Real Estate
Ownership interest in apartment property held-for-sale		100.00%
Number of units in apartment property held-for-sale	191	191
Proceeds from sale of property classified as held-for-sale	11,400,000
Gain on sale of investment classified as held-for-sale	$ 430,000

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.14(d))

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 14

-Subparagraph d

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 13

-Subparagraph g

-Chapter V

-Subsection II

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

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