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Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Common Stock, par value (in usd per share)	$ 0.001	$ 0.001
Common Stock, shares authorized (in shares)	800,000,000	700,000,000
Number of shares outstanding (in shares)	77,175,283	70,939,647
Griffin Capital Essential Asset REIT, Inc. [Member]
Noncontrolling interest, units eligible towards redemption (in shares)	531,000	531,000
Common Stock, par value (in usd per share)	$ 0.001	$ 0.001
Common Stock, shares authorized (in shares)	700,000,000	700,000,000
Number of shares outstanding (in shares)	170,906,111	176,032,871

X

- Definition

Noncontrolling interest subject to redemption value that is classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer.

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No definition available.

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- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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