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Commitments And Contingencies (Narrative) (Details) $ in Millions	Aug. 01, 2018 USD ($) a ft² property contract	Jun. 30, 2018 ft² property
Other Commitments [Line Items]
Number of properties		195
Area of real estate property | ft²		12,500,000
Non-binding Letter Of Intent [Member]
Other Commitments [Line Items]
Number of non-binding letters of intent | contract	3
Number of properties	3
Area of real estate property | ft²	75,000
Total aggregate initial investment | $	$ 22.7
Outstanding Contract With Third Party [Member]
Other Commitments [Line Items]
Outstanding contracts with a third-party | contract	5
Industrial Building [Member] | Outstanding Contract With Third Party [Member]
Other Commitments [Line Items]
Number of properties	5
Area of real estate property | ft²	672,000
Improved Land Parcels [Member] | Non-binding Letter Of Intent [Member]
Other Commitments [Line Items]
Number of properties	1
Area of real estate property | a	2.3
Improved Land Parcels [Member] | Outstanding Contract With Third Party [Member]
Other Commitments [Line Items]
Number of properties	1
Area of real estate property | a	1.3
Improved Land Parcels [Member] | San Francisco Bay Area [Member] | Outstanding Contract With Third Party [Member]
Other Commitments [Line Items]
Number of properties	1
Area of real estate property | a	1.3

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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