Net proceeds after transaction costs and tax protection payments.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

This element represents the amount of gain (loss) on sale of properties during the reporting period gross of the applicable income taxes realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 974
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-15.(a)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=6875705&loc=d3e641549-123027

+ Details

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Period Type:	duration

- 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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Period Type:	duration

- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the 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=56944662&loc=d3e3179-108585

+ Details

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Period Type:	duration

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- Details

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Real Estate Investments - Dispositions (Details) - USD ($) $ in Thousands							9 Months Ended
	Sep. 15, 2016	Jul. 29, 2016	Jun. 20, 2016	Jan. 08, 2016	Jan. 07, 2016	Nov. 02, 2015	Sep. 30, 2016	Sep. 30, 2015
Real Estate Dispositions
Dispositions of real estate investments							$ 96,312	$ 50,613
Richmond Tower \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate Dispositions
Dispositions of real estate investments						$ 78,000
Net proceeds after transaction costs				$ 77,000
Gain (Loss) on disposition of property				$ 26,200
Economic Development Authority Building \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate Dispositions
Net proceeds after transaction costs					$ 6,600
Gain (Loss) on disposition of property					$ 400
Willowbrook Commons \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate Dispositions
Dispositions of real estate investments			$ 9,200
Gain (Loss) on disposition of property			$ 100
Kroger Junction \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate Dispositions
Dispositions of real estate investments		$ 3,700
Gain (Loss) on disposition of property		$ 100
Oyster Point \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate Dispositions
Dispositions of real estate investments	$ 6,400
Net proceeds after transaction costs	0
Gain (Loss) on disposition of property	$ 3,800