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Recent Real Estate Transactions (Disposals of Properties) (Details) - Residential Properties [Member]			3 Months Ended
	Mar. 31, 2017 USD ($) Property	Feb. 27, 2017 USD ($)	Mar. 31, 2017 USD ($) Property
Real Estate Properties [Line Items]
Number of properties | Property	106		106
Rangewood Medical Office Building [Member]
Real Estate Properties [Line Items]
Proceeds from sale of property		$ 2,200,000
Gain (loss) on sale of property		$ (170,000)
Regatta Square Retail Center [Member]
Real Estate Properties [Line Items]
Proceeds from sale of property	$ 3,000,000
Gain (loss) on sale of property	$ 756,000
Two Dubos Model Homes [Member]
Real Estate Properties [Line Items]
Proceeds from sale of property			$ 815,000
Gain (loss) on sale of property			$ (45,000)
Number of properties | Property	2		2

X

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

+ Details

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Balance Type:	credit
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X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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- Details

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- Details

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- Details

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