Equity Method Investment, Debt Contributed To Acquire Interest In Joint Venture

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- Definition

Equity Method Investment, Net Equity Value Contributed To Acquire Interest In Joint Venture

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- Definition

Equity Method Investment, Other Assets Contributed To Acquire Interest In Joint Venture

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- Definition

Equity Method Investment, Real Estate Contributed To Acquire Interest In Joint Venture

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- Definition

Number of Joint Ventures

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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

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- Definition

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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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.

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Investment in Unconsolidated Joint Ventures (Narrative) (Details) $ in Millions		12 Months Ended
	Nov. 01, 2017 USD ($)	Dec. 31, 2017 property joint_venture	Nov. 07, 2017 property	Dec. 31, 2016 property	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Number of real estate properties \| property		205		187
2001 Sixth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership		50.00%		50.00%	50.00%
2020 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership		50.00%		50.00%	50.00%
33 Chun Choi Street (Hong Kong)
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership		50.00%		50.00%	50.00%
Seattle, Washington, Hong Kong, Tokyo, Japan and Osaka, Japan [Member]
Schedule of Equity Method Investments [Line Items]
Number of joint ventures \| joint_venture		4
Prudential Real Estate Investors and Griffin Capital Essential Asset REIT, Inc.
Schedule of Equity Method Investments [Line Items]
Number of joint ventures \| joint_venture		2
PREI
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership		20.00%		20.00%	20.00%
Number of joint ventures \| property		1
Number of real estate properties \| property		10
GCEAR
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership		20.00%		20.00%	20.00%
Number of real estate properties \| property		1
1101 Space Park Drive
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership		17.00%		17.00%
Mitsubishi Corporation Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership	50.00%
Number of real estate properties \| property			2
Real Estate Investments, Joint Ventures \| $	$ 2.1
Sale price of building \| $	119.7
Other assets \| $	18.8
Debt, Current \| $	136.4
Cash \| $	$ 54.6