Loss from investments Unrealized Gain (Loss) on Investments Above-market lease intangible assets - accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Limited Partners' Capital Account by Class [Axis] Limited Partners' Capital Account by Class [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Retention Agreement Retention Agreement [Member] Retention Agreement Award Timing Predetermined Award Timing Predetermined [Flag] Remaining 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Related Party Transaction [Axis] Related Party Transaction [Axis] Real Estate [Domain] Real Estate [Domain] Extension option, period Debt Instrument, Extension Option, Period Debt Instrument, Extension Option, Period IOS Portfolio IOS Portfolio [Member] IOS Portfolio Entity File Number Entity File Number Additional Paid-In Capital Additional Paid-in Capital [Member] Interest Rate Swap Interest Rate Swap Interest Rate Swap [Member] Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Leases [Abstract] Office Segment Office Office Segment [Member] Office Segment 2030 Lessor, Operating Lease, Payment to be Received, Year Four Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Operating Activities [Axis] Operating Activities [Axis] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Schedule of Discontinued Operations and Related and Unrealized Gains (Losses) Disposal Groups, Including Discontinued Operations [Table Text Block] Accrued for construction in progress Construction in Progress Expenditures Incurred but Not yet Paid Shares withheld to satisfy employee tax withholding requirements on vesting restricted shares Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Net loss per share attributable to common shareholders, basic (in usd per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Net (income) loss attributable to noncontrolling interests from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest Subsidiary or Equity Method Investee, Sale of Stock, Type [Table] Subsidiary or Equity Method Investee, Sale of Stock, Type [Table] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Net income (loss) per share from discontinued operations, basic (in usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Distributions payable to noncontrolling interests Accrual Of Distributions To Noncontrolling Interests Accrual Of Distributions To Noncontrolling Interests Continuing Operations Continuing Operations [Member] Deferred rent Deferred Rent Revenue Recognized During Period Deferred rent revenue recognized during period. Area of real estate property (in sq ft) Area of Real Estate Property Measurement Input Type [Domain] Measurement Input Type [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount Unamortized Deferred Financing Costs, Premiums, and Discounts, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Share-based compensation Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Below-market lease intangible liabilities - accumulated amortization Below Market Lease, Accumulated Amortization Limited partnership redeem (in shares) Limited Partners' Capital Account, Units Redeemed Limited Partners' Capital Account, Units Redeemed Index adjustment percentage Index Adjustment Percentage Index Adjustment Percentage Other income (expenses): Interest Income (Expense), Operating [Abstract] Dividends declared to common shareholders Dividends, Common Stock, Cash Share-based compensation Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Total shareholders’ equity Equity, Attributable to Parent Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Insider Trading Policies and Procedures [Line Items] Total compensation expense Share-Based Payment Arrangement, Expense Common Stock, Shares Issued Not Disclosed Common Stock, Shares Issued Not Disclosed Common Stock, Shares Issued Not Disclosed Common stock, shares authorized (in shares) Common Stock, Shares Authorized Restricted Shares Restricted Shares [Member] Restricted Shares Total liabilities and equity Liabilities and Equity Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Property Contributions by Previously Affiliated Parties and Unaffiliated Third Parties Property Contributions By Previously Affiliated Parties And Unaffiliated Third Parties [Member] Property Contributions By Previously Affiliated Parties And Unaffiliated Third Parties Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Cash, cash equivalents and restricted cash at the beginning of the period Cash, cash equivalents and restricted cash at the end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Net loss attributable to noncontrolling interests Net loss Net Income (Loss) Attributable to Noncontrolling Interest Share-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Above-market lease intangible assets, net Above-market lease intangible assets, net Finite-Lived Intangible Assets, Net Interest Rate Swap, Effective July 1, 2025 - $100,000 Notional Amount, Interest Rate 3.58% Interest Rate Swap, Effective July 1, 2025 - $100,000 Notional Amount, Interest Rate 3.58% [Member] Interest Rate Swap, Effective July 1, 2025 - $100,000 Notional Amount, Interest Rate 3.58% Schedule of Operating Lease, Maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Value of shares authorized Sale of Stock, Shares Authorized Sale of Stock, Shares Authorized Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Net loss from continuing operations Net loss from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Right-of-use lease liabilities Total lease liabilities Operating Lease, Liability Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Total Lessor, Operating Lease, Payment to be Received Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Entity Shell Company Entity Shell Company Exchange of noncontrolling interests (in shares) Exchange of Noncontrolling Interests, Shares Exchange of Noncontrolling Interests, Shares Schedule of Carrying Values and Estimated Fair Values of Financial Instruments Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Amount of (loss) gain recognized in AOCI on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Industrial Segment Industrial Industrial Segment [Member] Industrial Segment Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Comprehensive loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Comprehensive loss attributable to common shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name BOA II Loan BOA II Loan [Member] BOA II Loan Number of properties pledged as collateral Number Of Real Estate Properties Pledged As Collateral Number Of Real Estate Properties Pledged As Collateral Secured Debt Secured Debt [Member] Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Equity, Attributable to Noncontrolling Interest [Roll Forward] Class of Stock [Line Items] Class of Stock [Line Items] Dividends payable to common shareholders Accrual Of Distributions To Common Shareholders Increase decrease in distributions payable to common stockholders. Document Fiscal Period Focus Document Fiscal Period Focus Property tax expense Property tax expense Real Estate Tax Expense Unsecured Debt Unsecured debt Unsecured Debt [Member] Number of annual installments for awards settlement Limited Partners Capital Account, Number of Annual Installments for Awards Settlement Limited Partners' Capital Account, Number of Annual Installments for Awards Settlement Award Timing Method Award Timing Method [Text Block] Net loss per share from continuing operations, basic (in usd per share) Income (Loss) from Continuing Operations, Per Basic Share Award Type [Axis] Award Type [Axis] Total Debt, net Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Cumulative Distributions Accumulated Distributions in Excess of Net Income [Member] Trading Symbol Trading Symbol 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Vested (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Real Estate [Table] Real Estate [Table] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Percentage of noncontrolling interests based on weighted average shares outstanding (percent) Percentage of Noncontrolling Interests Based on Weighted Average Shares Percentage of noncontrolling interests based on weighted average shares. Applicable variable rate (percent) Debt Instrument, Variable Rate Debt Instrument, Variable Rate Entity Address, City or Town Entity Address, City or Town Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Useful life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Total real estate Total real estate Real Estate Investment Property, at Cost Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Schedule of Activity for Noncontrolling Interests Activity for Non-Controlling Interests [Table Text Block] Activity for noncontrolling interests. Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Other (expense) income, net Disposal Group, Including Discontinued Operation, Other Income Schedule of Real Estate and Acquired Lease Intangibles Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Units received (in shares) Limited Partners' Capital Account, Units Received, Shares Limited Partners' Capital Account, Units Received, Shares 2029 Long-Term Debt, Maturity, Year Three Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding GCEAR Operating Partnership GCEAR Operating Partnership [Member] GCEAR Operating Partnership Operating lease right-of-use assets obtained in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Unamortized deferred financing costs Debt Issuance Costs, Net Significant Other Observable Inputs Level 2 Fair Value, Inputs, Level 2 [Member] Below-market lease intangible liabilities, net Below Market Lease And Other Intangible Liabilities, Net Below Market Lease And Other Intangible Liabilities, Net Restricted cash Total restricted cash Restricted Cash and Cash Equivalent Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Related Party Related Party [Member] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding IOS Properties IOS Properties [Member] IOS Properties Remaining 2026 Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year Assets Held for Sale and Discontinued Operations Discontinued Operations, Policy [Policy Text Block] Schedule of Amortization of Intangible Assets and Other Leasing Costs Summary Of Amortization Of Intangible Assets And Other Leasing Costs [Table Text Block] Summary Of Amortization Of Intangible Assets And Other Leasing Costs PEO PEO [Member] Change in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Limited partnership units issued (in shares) Limited Partners' Capital Account, Units Issued Accumulated Earnings Retained Earnings [Member] Accrued expenses and other liabilities Total Payables Accounts Payable and Accrued Liabilities Number of Unvested Shares of Restricted Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Effective Interest Rate (percent) Debt Instrument, Interest Rate, Effective Percentage Schedule of Accrued Expenses and Other Liabilities Schedule of Accrued Liabilities [Table Text Block] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income Statement [Abstract] Income Statement [Abstract] Office rent and related expenses Office Rent And Related Expenses [Member] Office Rent And Related Expenses Spread on variable rate (percent) Debt Instrument, Basis Spread on Variable Rate Accrued tenant obligations and other Accrual Of Tenant Obligations Accrual Of Tenant Obligations Net income (loss) per share from discontinued operations, diluted (in usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Sale of Stock [Domain] Sale of Stock [Domain] Other assets Other Assets Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Property tax expense Disposal Group, Including Discontinued Operation, Real Estate Tax Expense Disposal Group, Including Discontinued Operation, Real Estate Tax Expense Above-market lease intangible assets Above Market Leases [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Beneficial Owner Beneficial Owner [Member] Change in fair value of swap agreements Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Net loss per share from continuing operations, diluted (in usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Total Shareholders’ Equity Parent [Member] Net loss Net loss Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 2029 Lessor, Operating Lease, Payment to be Received, Year Three Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Current Notional Amounts Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Income Taxes Regulatory Income Taxes, Policy [Policy Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Building and improvements Building and Building Improvements [Member] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Real estate impairment, measurement input Real Estate Impairment, Measurement Input Real Estate Impairment, Measurement Input Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Net cash provided by (used in) investing activities - discontinued operations Cash Provided by (Used in) Investing Activity, Discontinued Operation Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative expenses General and administrative expenses General and administrative expenses General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash (used in) provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Building, Corporate Headquarters Building, Corporate Headquarters [Member] Building, Corporate Headquarters Interest Rate Swap, Effective July 1, 2025 - $85,000 Notional Amount, Interest Rate 3.57% Interest Rate Swap, Effective July 1, 2025 - $85,000 Notional Amount, Interest Rate 3.57% [Member] Interest Rate Swap, Effective July 1, 2025 - $85,000 Notional Amount, Interest Rate 3.57% Related Party Transactions [Abstract] Related Party Transactions [Abstract] Schedule of amortization expense Amortization [Abstract] Subsequent Event Subsequent Event [Member] Real Estate [Line Items] Real Estate [Line Items] Other liabilities Other Liabilities Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Schedule of Lease, Cost Lease, Cost [Table Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Depreciation of building and building improvements Depreciation expense Depreciation Operating Partnership Operating Partnership [Member] Operating Partnership Equity Components [Axis] Equity Components [Axis] Payables And Accruals [Line Items] Payables And Accruals [Line Items] Payables And Accruals Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Expenses: Operating Costs and Expenses [Abstract] Number of reportable segments Number of Reportable Segments Unamortized debt premium/(discount) Debt Instrument, Unamortized Discount (Premium), Net Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Deferred leasing costs and other assets Increase (Decrease) In Deferred Costs And Other Assets Increase (Decrease) In Deferred Costs And Other Assets Other Performance Measure, Amount Other Performance Measure, Amount Schedule of Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Entity Address, State or Province Entity Address, State or Province Financing lease payment Finance Lease, Principal Payments 2027 Lessor, Operating Lease, Payment to be Received, Year One Related Party [Domain] Related and Nonrelated Parties [Domain] Prorations and other closing adjustments Asset Acquisition, Adjustment Asset Acquisition, Adjustment Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Real estate taxes payable Accrual for Taxes Other than Income Taxes Dividends to common shareholders Payments of Ordinary Dividends, Common Stock Thereafter Long-Term Debt, Maturity, After Year Four Long-Term Debt, Maturity, After Year Four Entity [Domain] Entity [Domain] Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Number of office space leases Lessee, Operating Lease, Number Of Leases Lessee, Operating Lease, Number Of Leases Florida Mortgage Loan Florida Mortgage Loan [Member] Florida Mortgage Loan Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Common Shares Owned Common Shares Owned [Member] Common Shares Owned Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Right-of-use lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Additional increase in limit Line Of Credit Facility, Accordion Feature, Increase Limit Line Of Credit Facility, Accordion Feature, Increase Limit Percentage of noncontrolling interests based on total shares (percent) Subsidiary, Ownership Percentage, Noncontrolling Owner Entity Interactive Data Current Entity Interactive Data Current Operating lease costs Operating Lease, Cost Carrying Value Reported Value Measurement [Member] Forward-Starting, Floating to Fixed SOFR Interest Rate Swap Forward-Starting, Floating To Fixed SOFR Interest Rate Swap [Member] Forward-Starting, Floating To Fixed SOFR Interest Rate Swap Unrecognized cost recognition period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Real Estate [Abstract] Real Estate [Abstract] Equity [Abstract] Equity [Abstract] Number of real estate properties designated for redevelopment or repositioning Number Of Real Estate Properties Designated For Redevelopment Or Repositioning Number Of Real Estate Properties Designated For Redevelopment Or Repositioning Segment Reporting Segment Reporting Disclosure [Text Block] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Other Commitments [Line Items] Other Commitments [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Ownership [Domain] Ownership [Domain] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Amortization of intangible assets Amortization of Intangible Assets Schedule of Undiscounted Cash Flow Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Mutual Funds Asset Mutual Funds Asset, Fair Value Disclosure Mutual Funds Asset, Fair Value Disclosure Entity Central Index Key Entity Central Index Key PEO Name PEO Name Below-market lease intangible liabilities, net Below Market Lease, Net Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Rental income Revenues Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Corporate operating expenses to related parties Corporate operating expenses to related parties Corporate operating expenses to related parties Costs and Expenses, Related Party Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Loan Revolving Credit Facility [Member] Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Other comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Exercise Price Award Exercise Price Deferred leasing costs, net Deferred Costs, Leasing, Net, Noncurrent Entity Filer Category Entity Filer Category Griffin Capital, LLC Griffin Capital, LLC [Member] Griffin Capital, LLC Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Exchange of noncontrolling interests Noncontrolling Interest, Exchange of Noncontrolling Interests, Value Noncontrolling Interest, Exchange of Noncontrolling Interests, Value Subsequent Event Type [Axis] Subsequent Event Type [Axis] In-place lease intangible assets In-Place Lease Intangible Assets, Gross In-Place Lease Intangible Assets, Gross ASSETS Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Nonrelated Party Nonrelated Party [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Other Commitments [Axis] Other Commitments [Axis] Debt Instrument [Axis] Debt Instrument [Axis] Forfeited (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Fair Value Measurements Fair Value Disclosures [Text Block] Credit Facility [Domain] Credit Facility [Domain] Above-market lease intangible assets Finite-Lived Intangible Assets, Gross Building and improvements Building and improvements Investment Building and Building Improvements Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Income expected to be recognized in earnings in next 12 months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Contractual Interest Rate (percent) Debt Instrument, Interest Rate, Stated Percentage Property operating expense payable Accrued Property Operating Expenses Accrued Property Operating Expenses Shares withheld to satisfy employee tax withholding requirements on vesting restricted shares (in shares) Shares withheld to satisfy employee tax withholding requirements on vesting restricted shares (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Schedule of Real Estate Properties Schedule of Real Estate Properties [Table Text Block] Peakstone Realty Trust and Other Parties Peakstone Realty Trust And Other Parties [Member] Peakstone Realty Trust And Other Parties Ownership [Axis] Ownership [Axis] Interest Rate Contracts Derivative Instruments and Hedging Activities Disclosure [Text Block] Land Land Land Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Property Contributions by Unaffiliated Third Parties Property Contributions By Unaffiliated Third Parties [Member] Property Contributions By Unaffiliated Third Parties Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unrecognized cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Related Party Transaction [Line Items] Related Party Transaction [Line Items] Discount amortization - note receivable Amortization of Note Receivable Discount Amortization of Note Receivable Discount Document Quarterly Report Document Quarterly Report Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Interest Rate Swap, Effective July 1, 2025 - $100,000 Notional Amount, Interest Rate 3.60% Interest Rate Swap, Effective July 1, 2025 - $100,000 Notional Amount, Interest Rate 3.60% [Member] Interest Rate Swap, Effective July 1, 2025 - $100,000 Notional Amount, Interest Rate 3.60% 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Reverse stock split Stockholders' Equity Note, Stock Split, Conversion Ratio Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Distributions Distributions [Member] Distributions [Member] Schedule of Debt Schedule of Debt [Table Text Block] Granted (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Related Party [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net cash used in operating activities - continuing operations Cash Provided by (Used in) Operating Activity, Continuing Operation Restatement Determination Date: Restatement Determination Date [Axis] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Amortization of swap interest Amortization Of Swap Interest Amortization Of Swap Interest Non-PEO NEO Non-PEO NEO [Member] Loss from discontinued operations Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Net cash (used in) provided by investing activities - continuing operations Cash Provided by (Used in) Investing Activity, Continuing Operation Schedule of Interest Rate Swaps Schedule of Interest Rate Derivatives [Table Text Block] Sale of Stock [Axis] Sale of Stock [Axis] Griffin Capital Essential Asset Operating Partnership, L.P. Griffin Capital Essential Asset Operating Partnership, L.P. [Member] Griffin Capital Essential Asset Operating Partnership, L.P. [Member] Land Land [Member] Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Payment for debt extinguishment Payment for Debt Extinguishment or Debt Prepayment Cost 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Noncontrolling interests Beginning balance Ending balance Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Compensation Amount Outstanding Recovery Compensation Amount Cash reserves Deposits [Member] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Real Estate Real Estate Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Prepaid tenant rent Accrued Rent MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Asset acquisition transaction cost Asset Acquisition, Consideration Transferred, Transaction Cost Number of operating real estate properties Number Of Operating Real Estate Properties Number Of Operating Real Estate Properties Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Commitments Other Commitment Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Revenue: Revenues [Abstract] Discontinued Operations: Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax 2027 Long-Term Debt, Maturity, Year One Lessor, Lease, Description [Table] Lessor, Lease, Description [Table] Segments [Domain] Segments [Domain] In-place lease intangible assets Amortization Of In-Please Lease Intangible Assets Amortization Of In-Please Lease Intangible Assets Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Amount reclassified from AOCI into earnings Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Amortization of leasing costs and in-place lease intangible assets Amortization of Lease Costs and Intangible Assets Amortization of Lease Costs and Intangible Assets Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Payments for construction in progress Payments for Construction in Process Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Cash paid for operating lease liabilities Operating Lease, Payments Interest payable Interest Payable Ownership interest (as a percent) Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Discontinued Operations Discontinued Operations [Member] Distributions payable Dividends Payable Restricted lockbox Restricted Lockbox [Member] Restricted lockbox. All Executive Categories All Executive Categories [Member] Common shares, $0.001 par value; 800,000,000 shares authorized; 37,187,359 and 37,176,167 shares outstanding in the aggregate as of March 31, 2026 and December 31, 2025, respectively Common Stock, Value, Issued Operating Activities [Domain] Operating Activities [Domain] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Decrease in fair value swap agreement Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Exchange of noncontrolling interest to common stock Exchange Of Noncontrolling Interest To Common Stock Exchange Of Noncontrolling Interest To Common Stock Rental income Disposal Group, Including Discontinued Operation, Revenue Weighted-average number of common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Information Segment Reporting, Policy [Policy Text Block] Commitments and contingencies (Note 12) Commitments and Contingencies Limited Partners' Capital Account, Class [Domain] Limited Partners' Capital Account, Class [Domain] Merger agreement termination payment Business Combination, Termination Fee Business Combination, Termination Fee Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Total real estate Real Estate Investment Property, Additions Real Estate Investment Property, Additions Derivative [Table] Derivative [Table] Business Combination [Axis] Business Combination [Axis] Total comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Property operating expense Other Cost and Expense, Operating Non-controlling Interests Noncontrolling Interest [Member] Transaction expenses Transaction expenses Gain (Loss), Foreign Currency Transaction, after Tax Restricted Cash and Cash Equivalent Item [Line Items] Restricted Cash and Cash Equivalent Item [Line Items] Document Transition Report Document Transition Report Total NOI Total NOI Net Operating Income Net Operating Income Noncontrolling Interest [Table] Noncontrolling Interest [Table] Underlying Securities Award Underlying Securities Amount Units received, percentage Limited Partners' Capital Account, Units Received, Percentage Limited Partners' Capital Account, Units Received, Percentage Equity Component [Domain] Equity Component [Domain] Cumulative distributions Cumulative Distributions Cumulative distributions paid or declared. Document Period End Date Document Period End Date Total assets acquired Asset Acquisition, Assets Acquired Asset Acquisition, Assets Acquired PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Estimated potential cost Contractual Obligation Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Total Secured Debt Debt Instrument, Fair Value Disclosure Schedule of Aggregate Purchase Price Allocation Asset Acquisition [Table Text Block] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type Significant Unobservable Inputs Fair Value, Inputs, Level 3 [Member] Name Outstanding Recovery, Individual Name Number of employees eligible for cash retention bonus Number Of Employees Eligible For Cash Retention Bonus Number Of Employees Eligible For Cash Retention Bonus 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and Restated Credit Agreement [Member] Second Amended and Restated Credit Agreement Above-market lease intangible assets Finite-Lived Intangible Assets Acquired Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Net cash (used in) provided by operating activities - discontinued operations Cash Provided by (Used in) Operating Activity, Discontinued Operation Weighted average interest rate (percent) Debt, Weighted Average Interest Rate Interest Strike Rate Derivative, Fixed Interest Rate Depreciation and amortization Disposal Group, Including Discontinued Operation, Depreciation and Amortization Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Repurchase of common shares to satisfy employee tax withholding requirements 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in Active Markets for Identical Assets and Liabilities Fair Value, Inputs, Level 1 [Member] Loss from disposition of assets Net loss from disposition of assets Loss from disposition of assets Gain from disposition of assets Gain (Loss) on Disposition of Assets Leases Lessor, Operating Leases [Text Block] Related Party Transaction [Table] Related Party Transaction [Table] Offering costs Payments Of Offering Costs, Net Payments Of Offering Costs, Net Net loss per share attributable to common shareholders, diluted (in usd per share) Earnings Per Share, Diluted Related party transaction, rate (as a percent) Related Party Transaction, Rate Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Supplemental disclosures of non-cash investing and financing transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Disposal Groups, Including Discontinued Operations [Table] 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Disclosures [Line Items] Total Debt Total principal Long-Term Debt, Gross Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Equity Declaration of Dividends Equity [Text Block] Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Distributions to noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Net loss attributable to common shareholders Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Other Commitments [Domain] Other Commitments [Domain] Total real estate, net Real Estate Investment Property, Net Total “Interest expense” reported on the consolidated statements of operations Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net Shareholders’ equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Interest expense Disposal Group, Including Discontinued 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Interest Disclosure [Text Block] Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Debt, net Long-Term Debt, Excluding Discontinued Operations Long-Term Debt, Excluding Discontinued Operations Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Unvested Restricted Shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount All Adjustments to Compensation All Adjustments to Compensation [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Amendment Flag Amendment Flag ATM Program ATM Program [Member] ATM Program Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized 2028 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2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Purchase price of the property Asset Acquisition, Price of Acquisition, Expected 2028 Lessor, Operating Lease, Payment to be Received, Year Two Total liabilities Liabilities Distributions to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Credit facility Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Illinois Mortgage Loan Illinois Mortgage Loan [Member] Illinois Mortgage Loan Area of real estate property disposed of Area Of Real Estate Property Disposed Of Area Of Real Estate Property Disposed Of Statement [Line Items] Statement [Line Items] Loss from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Real estate impairment provision Disposal 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restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation