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Real Estate (Narrative) (Details) - USD ($)					3 Months Ended	9 Months Ended
	Nov. 02, 2016	May 04, 2016	Feb. 25, 2016	Feb. 11, 2016	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Real Estate Properties [Line Items]
Purchase price of acquired property						$ 31,928,000	$ 24,453,000
Shoppes at Arts District [Member]
Real Estate Properties [Line Items]
Purchase price of acquired property			$ 20,500,000
Mortgage interest rate			5.20%
Mortgage maturity date			Apr. 01, 2022
Shoppes at Arts District [Member] | Parent Company [Member]
Real Estate Properties [Line Items]
Purchase price of acquired property			$ 8,500,000
Glenwood Village [Member]
Real Estate Properties [Line Items]
Purchase price of acquired property		$ 19,500,000
Liberty Marketplace [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Sales price of real estate sold				$ 15,000,000
Upland Square [Member]
Real Estate Properties [Line Items]
Impairment charges					$ 6,300,000	$ 6,300,000
Upland Square [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Sales price of real estate sold	$ 83,300,000

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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
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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element.

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