Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Range [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Equity Method Investments Equity Method Investments [Member] Carrying Amount Reported Value Measurement [Member] Fixed rate loan, 6.25% due in 2030 Fixed rate loan, 6.25% Due 2030 [Member] Fixed rate loan, 6.25% Due 2030 Document Fiscal Year Focus Document Fiscal Year Focus Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Straight line rents Deferred Rent Receivables, Net Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Common shares of beneficial interest, $.01 par value: 100,000,000 shares authorized; 67,001,208 and 66,653,129 shares issued and outstanding, respectively Common Stock, Value, Issued Schedule of Outstanding Indebtedness Schedule of Long-Term Debt Instruments [Table Text Block] Fair value Derivative Instruments in Hedges, at Fair Value, Net Restatement Determination Date Restatement Determination Date Derivative Instrument [Axis] Derivative Instrument [Axis] Construction Supervision Fees Property Management Agreement, Construction Supervision Fees [Member] Property Management Agreement, Construction Supervision Fees Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Other States Other States [Member] Other States [Member] Accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Share grants, repurchases and forfeitures (in shares) Stock Issued During Period, Shares, Grants, Repurchases, and Forfeitures Stock Issued During Period, Shares, Grants, Repurchases, and Forfeitures Fixed Rate Loan, 6.40%, due in 2030 Fixed Rate Loan, 6.40%, due in 2030 [Member] Fixed Rate Loan, 6.40%, due in 2030 Cumulative common distributions Cumulative Dividends Leases [Abstract] Leases [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Related Person Transactions Related Party Transactions Disclosure [Text Block] Distributions to noncontrolling interests Payments to noncontrolling interests Payments to Noncontrolling Interests Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Notional amount Derivative, Notional Amount Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Investment in unconsolidated joint venture, holding periods Investment in Unconsolidated Joint Venture, Term Investment in Unconsolidated Joint Venture, Term Number of reportable segments Number of Reportable Segments Debt instrument, prepayment lockout period Debt Instrument, Prepayment Lockout Period Debt Instrument, Prepayment Lockout Period Floating Rate Loan, Due in 2025 Floating Rate Loan, Due In 2025 [Member] Floating Rate Loan, Due In 2025 Total real estate properties, gross Real Estate Investment Property, at Cost Interest and other income Interest and Other Income Other comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Entity Address, City or Town Entity Address, City or Town Shareholders' Equity Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Title and Position [Domain] Title and Position [Domain] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Number of properties used as collateral Number Of Properties Used As Collateral Number Of Properties Used As Collateral Organization and Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Acquired real estate leases, net Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Schedule of Weighted Average Interest Rate Under Floating Rate Loans Schedule Of Weighted Average Interest Rate Under Floating Rate Loans [Table Text Block] Schedule Of Weighted Average Interest Rate Under Floating Rate Loans Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Schedule of Net Loss Attributable to Noncontrolling Interest Schedule Of Net Income (Loss) Attributable To Noncontrolling Interest [Table Text Block] Schedule Of Net Income (Loss) Attributable To Noncontrolling Interest Other comprehensive gain (loss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Rental Revenue Revenue Benchmark [Member] Business Management Agreement, Business Management Fees And Incentive Fees Business Management Agreement, Business Management Fees And Incentive Fees [Member] Business Management Agreement, Business Management Fees And Incentive Fees Straight line rental income Straight Line Rent ILPT Floating Rate Loan ILPT Floating Rate Loan [Member] ILPT Floating Rate Loan Less: loss (gain) on derivatives attributable to noncontrolling interests Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Noncontrolling Interest Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] (Loss) gain on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Real estate improvements accrued not paid Capital Expenditures Incurred but Not yet Paid Noncontrolling Interests Noncontrolling Interest [Member] Number of properties contributed Number of Properties Contributed Number of Properties Contributed Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Other comprehensive income (loss) attributable to common shareholders Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Interest rate cap Interest Rate Derivative Assets, at Fair Value Total indebtedness, net Long-Term Debt Number of properties subject to ground leases Number of Properties Subject to Ground Leases Document Period End Date Document Period End Date Change in assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Debt instrument, face amount Debt Instrument, Face Amount Shareholders' Equity Equity [Text Block] Expenses: Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Leases Lessor, Operating Leases [Text Block] Fixed rate loan, 5.71% Due 2031 Fixed rate loan, 5.71% Due 2031 [Member] Fixed rate loan, 5.71% Due 2031 Cumulative other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Schedule of Capitalized Lessor Expenses Schedule Of Capitalized Lessor Expenses [Table Text Block] Schedule Of Capitalized Lessor Expenses Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Mountain JV Amortizing Debt Mountain JV Amortizing Debt [Member] Mountain JV Amortizing Debt Geographical [Domain] Geographical [Domain] Thereafter Long Term Debt Maturities Repayments Of Principal After Year Four Long Term Debt Maturities Repayments Of Principal After Year Four Property Management and Construction Supervision Fees Property Management Agreement, Property Management and Construction Supervision Fees [Member] Property Management Agreement, Property Management and Construction Supervision Fees Schedule of Interest Rate Swap Derivatives Schedule of Interest Rate Derivatives [Table Text Block] 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] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Total capital expenditures Schedule of Capital Expenses Incurred Schedule of Capital Expenses Incurred Total principal balance Principal balance Total Long-Term Debt, Gross Asset Class [Domain] Asset Class [Domain] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Fixed rate loan, 2.95% Due 2036 Fixed rate loan, 2.95% Due 2036 [Member] Fixed rate loan, 2.95% Due 2036 Related Party Transactions [Abstract] Related Party Transactions [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Fixed Rate Loan, Due in 2030 Fixed Rate Loan, Due in 2030 [Member] Fixed Rate Loan, Due in 2030 Individual: Individual [Axis] Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Underlying Security Market Price Change Underlying Security Market Price Change, Percent FedEx FedEx [Member] FedEx Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of the Change in Fair Value of the Investment in the Unconsolidated Joint Venture Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Unrelated Third Party Unrelated Third Party [Member] Unrelated Third Party Award Timing Predetermined Award Timing Predetermined [Flag] Real estate improvements Payments for Capital Improvements Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Leasing costs Leasing Costs [Member] Leasing Costs Lessor, Lease, Description [Table] Lessor, Lease, Description [Table] Net loss Net loss Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Depreciation Depreciation Right-of-use asset Operating Lease, Right-of-Use Asset Property Management Fees Property Management Agreement, Property Management Fees [Member] Property Management Agreement, Property Management Fees Concentration Risk Type [Domain] Concentration Risk Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment Reporting Segment Reporting [Text Block] Minimum Minimum [Member] Expiration Date Trading Arrangement Expiration Date 2030 Long-Term Debt, Maturity, Year Four Hedging Relationship [Axis] Hedging Relationship [Axis] Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Restricted cash and cash equivalents Restricted Cash and Cash Equivalent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Investment in unconsolidated joint venture Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures Joint Venture Partnership Interest [Member] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Schedule of Real Estate Properties [Table] Real Estate Property, Ownership [Table] Nonrelated Party Nonrelated Party [Member] Joint Venture Affiliated Entity [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fixed Rate Loan, 2.77%, due in 2027 Fixed Rate Loan, 2.77%, due in 2027 [Member] Fixed Rate Loan, 2.77%, due in 2027 Common stock, shares authorized (in shares) Common Stock, Shares Authorized Total real estate properties, net Real Estate Investment Property, Net Business Management Agreement, Incentive Fees Business Management Agreement, Incentive Fees [Member] Business Management Agreement, Incentive Fees Unamortized debt issuance costs Debt Instrument, Unamortized Discount (Premium), Net Exercise Price Award Exercise Price Related Party Transaction [Axis] Related Party Transaction [Axis] Document Quarterly Report Document Quarterly Report 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] Floating Rate Loan, 5.87%, due in 2026 Floating Rate Loan, 5.87%, due in 2026 [Member] Floating Rate Loan, 5.87%, due in 2026 Rents receivable, including straight line rents of $124,507 and $114,199, respectively Accounts Receivable, after Allowance for Credit Loss Loss before income taxes and equity in (losses) earnings of unconsolidated joint venture Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Indebtedness Debt Disclosure [Text Block] Share price (in dollars per share) Stock Repurchased During Period, Price Per Share Stock Repurchased During Period, Price Per Share Building improvements Building Improvements [Member] Fixed rate loan, 4.13% Due 2033 Fixed rate loan, 4.13% Due 2033 [Member] Fixed rate loan, 4.13% Due 2033 Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Real Estate Investments Real Estate Disclosure [Text Block] Equity Component [Domain] Equity Component [Domain] Management service agreement term Management Service Agreement Term Management Service Agreement Term PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Equity in (losses) earnings of unconsolidated joint venture Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Number of trustees Number Of Trustees Number Of Trustees Real estate taxes Real Estate Tax Expense Measurement Input, Exit Capitalization Rate Measurement Input, Exit Capitalization Rate [Member] Measurement Input, Exit Capitalization Rate Total expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Counterparty Name [Domain] Counterparty Name [Domain] Distributions to common shareholders Common stock distributions, cash Total distribution Dividends, Common Stock, Cash Total equity attributable to common shareholders Equity, Attributable to Parent Tenant improvements Tenant Improvements [Member] Tenant Improvements ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Operating lease liability Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Strike rate Derivative, Cap Interest Rate Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Rental income Operating Lease, Lease Income Entity Central Index Key Entity Central Index Key Amortization of interest rate caps Amortization Of Interest Rate Caps Amortization Of Interest Rate Caps Additional paid in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Equity [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] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Income Statement [Abstract] Income Statement [Abstract] Equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Fixed Fixed Rate Loan [Member] Fixed Rate Loan Designated as Hedging Instrument Designated as Hedging Instrument [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Buildings and improvements Investment Building and Building Improvements Basis spread on variable rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] City Area Code City Area Code Cumulative Other Comprehensive Gain (Loss) AOCI Attributable to Parent [Member] Fixed rate loan, 4.02% Due 2033 Fixed rate loan, 4.02% Due 2033 [Member] Fixed rate loan, 4.02% Due 2033 Geographic Concentration Risk Geographic Concentration Risk [Member] All Individuals All Individuals [Member] Amortization of deferred leasing costs Operating Lease, Right-of-Use Asset, Periodic Reduction Distributions to common shareholders Payments of Dividends Rents receivable Increase (Decrease) in Leasing Receivables Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Fixed rate loan, 3.25% Due 2038 Fixed rate loan, 3.25% Due 2038 [Member] Fixed rate loan, 3.25% Due 2038 Twelve Mainland Properties Twelve Mainland Properties [Member] Twelve Mainland Properties [Member] Statement [Line Items] Statement [Line Items] Total assets Assets Accounting Standards Update and Change in Accounting Principle [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Interest expense Total amount of interest expense presented in the condensed consolidated statements of comprehensive income Interest Expense, Nonoperating Accounts payable and other liabilities Accounts Payable and Other Accrued Liabilities Other assets Increase (Decrease) in Other Operating Assets Common shares granted (in shares) Stock Issued During Period, Shares, New Issues Prepayment terms with premium amount Debt Instrument, Covenants, Prepayment with Premium, Amount Debt Instrument, Covenants, Prepayment with Premium, Amount PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two Floating Rate Loan, Due In 2024 Floating Rate Loan, Due In 2024 [Member] Floating Rate Loan, Due In 2024 Measurement Basis [Axis] Measurement Basis [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount NON-CASH INVESTING ACTIVITIES: Additional Cash Flow Elements, Investing Activity [Abstract] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Cumulative Net Deficit Retained Earnings [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Distributions from unconsolidated joint venture Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Distributions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Distributions Schedule of Quantitative Information of Significant Unobservable Inputs Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common shares, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Payment of debt issuance costs Payments of Debt Issuance Costs Net loss per share attributable to common shareholders, diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Certain variable payments Operating Lease, Variable Lease Income Cash Flow Hedging Cash Flow Hedging [Member] SUPPLEMENTAL DISCLOSURE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH AND CASH EQUIVALENTS: SUPPLEMENTAL DISCLOSURE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH [Abstract] SUPPLEMENTAL DISCLOSURE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH [Abstract] Incentive fee expense Incentive Fee Expense Amortization of acquired real estate leases and assumed real estate lease obligations Intangible Asset, Finite-Lived, Amortization Expense Ownership [Domain] Ownership [Domain] Adjustments to reconcile net loss to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Somerset, New Jersey Somerset, New Jersey [Member] Somerset, New Jersey Common share price (in dollars per share) Shares Issued, Price Per Share Consolidated Entity, Excluding Consolidated VIE Consolidated Entity, Excluding Consolidated VIE [Member] General and administrative expenses paid in common shares General And Administrative Expenses Paid In Common Shares General And Administrative Expenses Paid In Common Shares Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Estimated Fair Value Estimate of Fair Value Measurement [Member] Number of joint venture agreements Number of Joint Venture Agreements Number of Joint Venture Agreements Fixed rate loan, 4.31%, due in 2029 Fixed Rate Loan, 4.31%, due in 2029 [Member] Fixed Rate Loan, 4.31%, due in 2029 Schedule of the Principal Payments Due Under the Outstanding Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Business Management Fees Business Management Agreement, Business Management Fees [Member] Business Management Agreement, Business Management Fees Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Number of properties Number of Properties Acquired Represents the number of properties acquired or agreed to be acquired by the entity. Title and Position [Axis] Title and Position [Axis] CASH FLOWS FROM INVESTING ACTIVITIES: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Lessee, number of properties under an operating lease Lessee, Operating Lease, Number of Properties Lessee, Operating Lease, Number of Properties All Trading Arrangements All Trading Arrangements [Member] Schedule of Fair Value Measurements, Recurring and Nonrecurring Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Distributions Declared and Paid Dividends Declared [Table Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Consolidated joint venture cash distributions Consolidated Joint Venture Cash Distributions Consolidated Joint Venture Cash Distributions Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Related Party Transaction [Domain] Related Party Transaction [Domain] Share repurchases to pay for tax withholding (in shares) Stock Repurchased During Period, Shares 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] Common stock distributions declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Notes payable Notes and Loans Payable Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Number of properties owned Number Of Real Estate Properties Owned The number of properties owned as of the balance sheet date. Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common shares, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Fixed Rate Loan, 5.71%, due in 2031 Fixed Rate Loan, 5.71%, due in 2031 [Member] Fixed Rate Loan, 5.71%, due in 2031 Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Amortization of debt issuance costs, premiums and discounts Amortization of Debt Discount (Premium) Equity Components [Axis] Equity Components [Axis] Other operating expenses Other Cost and Expense, Operating Cumulative Common Distributions Cumulative Common Distributions [Member] Represents cumulative distributions to common shareholders. Related Party Related Party [Member] Income taxes paid Income Tax Paid, after Refund Received Entity Interactive Data Current Entity Interactive Data Current Net loss attributable to noncontrolling interests Total net loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive loss attributable to common shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input, Holdings Periods Measurement Input, Holdings Periods [Member] Measurement Input, Holdings Periods Proceeds from settlement of interest rate caps Proceeds From Settlement Of Interest Rate Caps Proceeds From Settlement Of Interest Rate Caps Termination Date Trading Arrangement Termination Date Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] CASH FLOWS FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Document Type Document Type Loss on extinguishment of debt Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Fair Value as of Grant Date Award Grant Date Fair Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Floating Rate Loan One Floating Rate Loan One [Member] Floating Rate Loan One Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies Commitments and Contingencies Number of management service agreements Number of Management Service Agreements Number of Management Service Agreements Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equity in (losses) earnings of unconsolidated joint venture Equity in losses (earnings) of unconsolidated joint venture Income (Loss) from Equity Method Investments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Loss on impairment of real estate Impairment of Real Estate Counterparty Name [Axis] Counterparty Name [Axis] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Fair Value of Assets and Liabilities Fair Value Disclosures [Text Block] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Amount of gain reclassified from cumulative other comprehensive loss into interest expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax SUPPLEMENTAL DISCLOSURES: Supplemental Cash Flow Information [Abstract] Noncontrolling interest, ownership percentage by noncontrolling owners Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Geographical [Axis] Geographical [Axis] Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Number of states where real estate is located Number Of States Where Real Estate Is Located Number of States Where Real Estate is Located Repayment of mortgage notes payable Repayments of secured debt Repayments of Secured Debt Other assets, net Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Reimbursed Property Level Operating Expenses Reimbursed Property Level Operating Expenses [Member] Reimbursed Property Level Operating Expenses Entity Tax Identification Number Entity Tax Identification Number Amount of (loss) gain recognized on derivatives in other comprehensive income (loss) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Mortgage notes payable, net Notes Payable Fixed rate loan, 4.14%, due in 2032 Fixed Rate Loan, 4.14%, due in 2032 [Member] Fixed Rate Loan, 4.14%, due in 2032 Cash and cash equivalents and restricted cash and cash equivalents at beginning of period Cash and cash equivalents and restricted cash and cash equivalents at end of period Total cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Purchase of interest rate cap Payments for Derivative Instrument, Investing Activities Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] 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] Debt Instrument [Axis] Debt Instrument [Axis] Ownership interest (as percent) Equity Method Investment, Ownership Percentage Land Land Amazon Amazon [Member] Amazon Related party transaction, amount Related Party Transaction, Amounts of Transaction Customer [Domain] Customer [Domain] Investment, Name [Domain] Investment, Name [Domain] 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net loss per share attributable to common shareholders, basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Repurchase of common shares Payments for Repurchase of Common Stock Range [Axis] Statistical Measurement [Axis] Due to related persons Increase (Decrease) in Due to Related Parties Insider Trading Arrangements [Line Items] Award Type Award Type [Axis] Consolidated joint venture Consolidated Joint Venture [Member] Consolidated Joint Venture Investment in unconsolidated joint venture Investment in Unconsolidated Joint Venture, Measurement Input Investment in Unconsolidated Joint Venture, Measurement Input Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Floating Rate Loan, Due In 2027 Floating Rate Loan, Due In 2027 [Member] Floating Rate Loan, Due In 2027 Cumulative net deficit Retained Earnings (Accumulated Deficit) 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] Proceeds from settlement of interest rate caps Proceeds From Derivative Instruments Investing Activities Proceeds From Derivative Instruments Investing Activities Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Proceeds from issuance of mortgage notes payable Proceeds from Issuance of Secured Debt Common Shares Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Derivative Contract [Domain] Derivative Contract [Domain] Concentration risk Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Business and Property Management Agreements with RMR Business And Property Management Agreements [Text Block] Business and Property Management Agreements [Text Block] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and equity Liabilities and Equity Reit Management And Research L L C Reit Management And Research L L C [Member] Represents details pertaining to Reit Management and Research LLC, or RMR. Employee Stock Option Share-Based Payment Arrangement, Option [Member] Reclassification from accumulated other comprehensive income, current period, before tax Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Fair Value of Financial Instruments Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Schedule of Effects on Consolidated Statements of Income and Comprehensive Income (Loss) Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Rentable square feet (in sqft) Net Rentable Area Total Equity Attributable to Common Shareholders Parent [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Real Estate Properties [Line Items] Real Estate Properties [Line Items] The Industrial Fund REIT LLC The Industrial Fund REIT LLC [Member] The Industrial Fund REIT LLC Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Share grants, repurchases and forfeitures Stock Issued During Period, Value, Grants, Repurchases, and Forfeitures Stock Issued During Period, Value, Grants, Repurchases, and Forfeitures Proceeds from sale of interest rate cap Proceeds From Sale Of Interest Rate Cap Proceeds From Sale Of Interest Rate Cap Tenancy in Common Tenancy in common Tenancy In Common [Member] Tenancy In Common Trustee Trustee [Member] Trustee Floating Floating Rate Loan [Member] Floating Rate Loan Adjustment to Compensation: Adjustment to Compensation [Axis] Fixed rate loan, 3.67% Due 2031 Fixed rate loan, 3.67% Due 2031 [Member] Fixed rate loan, 3.67% Due 2031 Real estate properties: Real Estate Investment Property, Net [Abstract] Accounts payable and other liabilities Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Hedging Designation [Domain] Hedging Designation [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Fixed rate loan, 4.42%, due in 2032 Fixed Rate Loan, 4.42%, due in 2032 [Member] Fixed Rate Loan, 4.42%, due in 2032 Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Mountain Floating Rate Loan Mountain Floating Rate Loan [Member] Mountain Floating Rate Loan Additional Paid In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Fixed rate loan, 4.27% Due 2037 Fixed rate loan, 4.27% Due 2037 [Member] Fixed rate loan, 4.27% Due 2037 Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Weighted average interest rate (as a percent) Debt Instrument, Interest Rate During Period Long-Term Debt, Fiscal Year Maturity [Abstract] Long-Term Debt, Fiscal Year Maturity [Abstract] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Net book value of collateral Aggregate Net Book Value of Real Estate Properties Collateralized Represents the aggregate net book value of real estate properties serving as a collateral for debt, as of the balance sheet date. Distributions of earnings from unconsolidated joint venture Proceeds from Equity Method Investment, Distribution Number of employees Entity Number of Employees Entity Address, Address Line Three Entity Address, Address Line Three Entity Address, Address Line Two Entity Address, Address Line Two Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Real Estate [Abstract] Real Estate [Abstract] Interest Rate Cap Interest Rate Cap [Member] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income Tax Expense (Benefit) Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Decrease in cash and cash equivalents and restricted cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Assumed real estate lease obligations, net Off-Market Lease, Unfavorable Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Net loss attributable to common shareholders Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Mountain Industrial REIT LLC Mountain Industrial REIT LLC [Member] Mountain Industrial REIT LLC Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Business Management And Operating Expenses Schedule Of Business Management And Operating Expenses [Table Text Block] Schedule Of Business Management And Operating Expenses Fixed rate loan, 3.10% Due 2035 Fixed rate loan, 3.10% Due 2035 [Member] Fixed rate loan, 3.10% Due 2035 Number of buildings, leasable land parcels easements Number of Buildings, Leasable Lands and Easements Owned The number of buildings, leaseable lands and easements owned as of the balance sheet date. Revenues [Abstract] Revenues [Abstract] Investment in unconsolidated joint venture Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Hawaii HAWAII Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract]