Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2023
Accounting Policies [Abstract]
Basis of Accounting	The accompanying unaudited consolidated financial statements of the Company are prepared by management on the accrual basis of accounting and in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information as contained in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), and in conjunction with rules and regulations of the SEC. Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the unaudited consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements.
Consolidation	The consolidated financial statements of the Company include all accounts of the Company, the Operating Partnership, and its consolidated subsidiaries. Intercompany transactions are shown on the consolidated statements if and to the extent to required pursuant to GAAP. With the exception of the Office Joint Venture (defined below), each property-owning entity is a wholly-owned subsidiary which is a special purpose entity (“SPE”). If a property is separately financed (i.e., not part of the borrowing base under our credit facility or a collateralized loan pool), the income from such property is generally not available to satisfy the debts or obligations of any other entity.
Use of Estimates	The preparation of the unaudited consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the unaudited consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates.
Per Share Data	The Company reports earnings per share for the period as (1) basic earnings per share computed by dividing net income (loss) attributable to common shareholders by the weighted average number of common shares outstanding during the period, and (2) diluted earnings per share computed by dividing net income (loss) attributable to common shareholders by the weighted average number of outstanding common shares and common share equivalents (e.g., OP Units and preferred shares, when considered convertible for purposes of computing diluted earnings per share). Unvested restricted share units (“RSUs”) that contain non-forfeitable rights to dividends are participating securities and are included in the computation of earnings per share pursuant to the two-class method. The effect of including unvested RSUs using the treasury stock method was excluded from our calculation of weighted average common shares outstanding - diluted, as the inclusion would have been anti-dilutive for the three and six months ended June 30, 2023 and June 30, 2022. Total excluded shares were 406,272 and 291,607 for the three and six months ended June 30, 2023, respectively. Total excluded shares were 177,877 and 166,572 for the three and six months ended June 30, 2022, respectively.
Segment Information	ASC 280, Segment Reporting, establishes standards for reporting financial and descriptive information about a public entity’s reportable segments. The Company internally evaluates all of the properties and interests therein as three reportable segments: Industrial, Office, and Other. Refer to Note 14, Segment Reporting, for further details.
Income Taxes	The Company has elected to be taxed as a REIT under the Internal Revenue Code (“Code”). To qualify as a REIT, the Company must meet certain organizational and operational requirements. The Company intends to adhere to these requirements and maintain its REIT status for the current year and subsequent years. As a REIT, the Company generally will not be subject to federal income taxes on taxable income that is distributed to shareholders. However, the Company may be subject to certain state and local taxes on its income and property, and federal income and excise taxes on its undistributed taxable income, if any. If the Company fails to qualify as a REIT in any taxable year, the Company will then be subject to federal income taxes on the taxable income at regular corporate rates and will not be permitted to qualify for treatment as a REIT for federal income tax purposes for four years following the year during which qualification is lost unless the Internal Revenue Service grants the Company relief under certain statutory provisions. Such an event could materially adversely affect net income and net cash available for distribution to shareholders. As of June 30, 2023, the Company satisfied the REIT requirements and distributed all of its taxable income.Pursuant to the Code, the Company has elected to treat Griffin Capital Essential Asset TRS, Inc. as a taxable REIT subsidiary (a “TRS”). In general, the TRS may perform non-customary services for the Company’s tenants and may engage in any real estate or non-real estate-related business. The TRS will be subject to corporate federal and state income tax.
Goodwill	Goodwill represents the excess of consideration paid over the fair value of underlying identifiable net assets of business acquired. The Company’s goodwill has an indeterminate life and is not amortized, but is tested for impairment on an annual basis, or more frequently if events or changes in circumstances indicate that the goodwill might be impaired. On October 1 of each year, the Company performs a qualitative analysis to determine whether an impairment of goodwill exists prior to quantitatively determining the fair value of the reporting units in step one of the impairment test. If a quantitative assessment is deemed necessary, and to the extent the carrying amount of the reporting unit’s allocated goodwill exceeds the unit’s fair value, the Company recognizes an impairment of goodwill for the excess up to the amount of goodwill of that reporting unit.
Recently Issued Accounting Pronouncements and Adoption of New Accounting Pronouncements	Recently Issued Accounting Pronouncements Changes to GAAP are established by the FASB in the form of ASUs to the FASB’s Accounting Standards Codification. The Company considers the applicability and impact of all ASUs. Other than the ASUs discussed below, the FASB has not recently issued any other ASUs that the Company expects to be applicable and have a material impact on the Company's financial statements. Adoption of New Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides temporary optional guidance that provides transition relief for reference rate reform, including optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships and other transactions that reference LIBOR or a reference rate that is expected to be discontinued as a result of reference rate reform if certain criteria are met. ASU 2020-04 was effective upon issuance, and the provisions generally can be applied prospectively as of January 1, 2020 through December 31, 2023. During the first quarter of 2020, the Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. The Company has subsequently elected to apply additional expedients related to contract modifications, changes in critical terms, and updates to the designated hedged risk(s) as qualifying changes have been made to applicable debt and anticipate to be made to derivative contracts. Application of these expedients preserves the presentation of derivatives and debt contracts consistent with past presentation. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope, which refines the scope of Topic 848 and clarifies some of its guidance. In December 2022, the FASB issued ASU No. 2022-06, Reference Rate Reform (Topic 848) to defer the sunset date of Topic 848 from December 31, 2022, to December 31, 2024. The Company continues to evaluate the impact of the guidance and may apply other elections as applicable as additional changes in the market occur.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2023

The accompanying unaudited consolidated financial statements of the Company are prepared by management on the accrual basis of accounting and in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information as contained in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), and in conjunction with rules and regulations of the SEC. Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the unaudited consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements.

Consolidation

The consolidated financial statements of the Company include all accounts of the Company, the Operating Partnership, and its consolidated subsidiaries. Intercompany transactions are shown on the consolidated statements if and to the extent to required pursuant to GAAP. With the exception of the Office Joint Venture (defined below), each property-owning entity is a wholly-owned subsidiary which is a special purpose entity (“SPE”). If a property is separately financed (i.e., not part of the borrowing base under our credit facility or a collateralized loan pool), the income from such property is generally not available to satisfy the debts or obligations of any other entity.

Use of Estimates

The preparation of the unaudited consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the unaudited consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates.

Per Share Data

The Company reports earnings per share for the period as (1) basic earnings per share computed by dividing net income (loss) attributable to common shareholders by the weighted average number of common shares outstanding during the period, and (2) diluted earnings per share computed by dividing net income (loss) attributable to common shareholders by the weighted average number of outstanding common shares and common share equivalents (e.g., OP Units and preferred shares, when considered convertible for purposes of computing diluted earnings per share). Unvested restricted share units (“RSUs”) that contain non-forfeitable rights to dividends are participating securities and are included in the computation of earnings per share pursuant to the two-class method. The effect of including unvested RSUs using the treasury stock method was excluded from our calculation of weighted average common shares outstanding - diluted, as the inclusion would have been anti-dilutive for the three and six months ended June 30, 2023 and June 30, 2022. Total excluded shares were 406,272 and 291,607 for the three and six months ended June 30, 2023, respectively. Total excluded shares were 177,877 and 166,572 for the three and six months ended June 30, 2022, respectively.

Segment Information

ASC 280, Segment Reporting, establishes standards for reporting financial and descriptive information about a public entity’s reportable segments. The Company internally evaluates all of the properties and interests therein as three reportable segments: Industrial, Office, and Other. Refer to Note 14, Segment Reporting, for further details.

Income Taxes

The Company has elected to be taxed as a REIT under the Internal Revenue Code (“Code”). To qualify as a REIT, the Company must meet certain organizational and operational requirements. The Company intends to adhere to these requirements and maintain its REIT status for the current year and subsequent years. As a REIT, the Company generally will not be subject to federal income taxes on taxable income that is distributed to shareholders. However, the Company may be subject to certain state and local taxes on its income and property, and federal income and excise taxes on its undistributed taxable income, if any. If the Company fails to qualify as a REIT in any taxable year, the Company will then be subject to federal income taxes on the taxable income at regular corporate rates and will not be permitted to qualify for treatment as a REIT for federal income tax purposes for four years following the year during which qualification is lost unless the Internal Revenue Service grants the Company relief under certain statutory provisions. Such an event could materially adversely affect net income and net cash available for distribution to shareholders. As of June 30, 2023, the Company satisfied the REIT requirements and distributed all of its taxable income.Pursuant to the Code, the Company has elected to treat Griffin Capital Essential Asset TRS, Inc. as a taxable REIT subsidiary (a “TRS”). In general, the TRS may perform non-customary services for the Company’s tenants and may engage in any real estate or non-real estate-related business. The TRS will be subject to corporate federal and state income tax.

Goodwill

Goodwill represents the excess of consideration paid over the fair value of underlying identifiable net assets of business acquired. The Company’s goodwill has an indeterminate life and is not amortized, but is tested for impairment on an annual basis, or more frequently if events or changes in circumstances indicate that the goodwill might be impaired. On October 1 of each year, the Company performs a qualitative analysis to determine whether an impairment of goodwill exists prior to quantitatively determining the fair value of the reporting units in step one of the impairment test. If a quantitative assessment is deemed necessary, and to the extent the carrying amount of the reporting unit’s allocated goodwill exceeds the unit’s fair value, the Company recognizes an impairment of goodwill for the excess up to the amount of goodwill of that reporting unit.

Recently Issued Accounting Pronouncements and Adoption of New Accounting Pronouncements

Recently Issued Accounting Pronouncements

Changes to GAAP are established by the FASB in the form of ASUs to the FASB’s Accounting Standards Codification. The Company considers the applicability and impact of all ASUs. Other than the ASUs discussed below, the FASB has not recently issued any other ASUs that the Company expects to be applicable and have a material impact on the Company's financial statements.

Adoption of New Accounting Pronouncements

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides temporary optional guidance that provides transition relief for reference rate reform, including optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships and other transactions that reference LIBOR or a reference rate that is expected to be discontinued as a result of reference rate reform if certain criteria are met. ASU 2020-04 was effective upon issuance, and the provisions generally can be applied prospectively as of January 1, 2020 through December 31, 2023. During the first quarter of 2020, the Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. The Company has subsequently elected to apply additional expedients related to contract modifications, changes in critical terms, and updates to the designated hedged risk(s) as qualifying changes have been made to applicable debt and anticipate to be made to derivative contracts. Application of these expedients preserves the presentation of derivatives and debt contracts consistent with past presentation. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope, which refines the scope of Topic 848 and clarifies some of its guidance. In December 2022, the FASB issued ASU No. 2022-06, Reference Rate Reform (Topic 848) to defer the sunset date of Topic 848 from December 31, 2022, to December 31, 2024. The Company continues to evaluate the impact of the guidance and may apply other elections as applicable as additional changes in the market occur.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

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- Definition

Disclosure of accounting policy for segment reporting.

+ References + Details