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Mortgage Notes Payable (Parenthetical) (Details) - USD ($)		9 Months Ended
	Apr. 10, 2015	Sep. 30, 2015
Sparkys Self-Storage Portfolio, Disposal Group [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	$ 16,932,524
Executive Office Park [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate Terms		Interest rate is subject to reset on July 1, 2018.
Morena Office Center [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate Terms		Interest rate subject to resetting on the 6th loan anniversary.
Pacific Oaks Plaza [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate Terms		Interest rate subject to resetting on the 6th loan anniversary.
Shoreline Medical Building [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate Terms		Interest rate subject to resetting on the 6th loan anniversary.
Model Home Properties [Member]
Debt Instrument [Line Items]
Fixed interest rate on mortgage range, minimum (in hundredths)		4.90%
Fixed interest rate on mortgage range, maximum (in hundredths)		5.80%

X

- Definition

Maximum contractual interest rate for funds borrowed, under the debt agreement.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.22(a)(1))



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.22(a)(2))



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Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.22(a)(1))



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Gross amount of debt extinguished.

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