Related Party Transactions [Abstract] Related Party Transactions [Abstract] Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Total Equity Beginning Balance Ending Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 5.875% Series A Cumulative Redeemable Preferred Stock Series A Preferred Stock [Member] Compensation costs capitalized Compensation Costs Capitalized Represents compensation costs capitalized during the period (including salary, bonus and equity-based compensation) for employees involved with construction activities necessary to get a property ready for its intended use and employees involved in the successful origination of leases. Other Assets Other Assets [Member] Title of Individual [Axis] Title of Individual [Axis] $125M senior notes $125M senior notes [Member] $125M senior notes [Member] Ground Lease Land [Member] Gain on sale recognized due to lease reclassification Sales-type Lease, Selling Profit (Loss) Sales-type Lease, Selling Profit (Loss) Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Amount of (loss) gain reclassified from AOCI into earnings under “Interest expense” Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax $25M Series 2019A Notes Series 2019A Guaranteed Senior Notes [Member] Series 2019A Guaranteed Senior Notes [Member] Purchase price Payments to Acquire Real Estate Leases as a Lessee Lessee, Leases [Policy Text Block] Acquisition expenses Acquisition Expenses Costs incurred to effect an acquisition transaction which have been expensed during the period. Such costs include advisory, legal, due diligence, and other professional fees. 2023 Long-term Debt, Maturities, Repayments of Principal in Year Four Increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect 11529-11547 Tuxford Street 11529-11547 Tuxford Street [Member] 11529-11547 Tuxford Street Maximum seller liability remedian costs Maximum Seller Liability Remedian Costs The maximum amount payable by seller for remediation costs. 8745-8775 Production Avenue 8745-8775 Production Avenue [Member] 8745-8775 Production Avenue [Member] Rent Relief Agreement, COVID-19 [Member] Rent Relief Agreement, COVID-19 [Member] Rent Relief Agreement, COVID-19 [Member] 11308-11350 Penrose Street 11308-11350 Penrose Street [Member] 11308-11350 Penrose Street Operating lease right-of-use assets obtained in exchange for lease liabilities upon adoption of ASC 842 on January 1, 2019 Right of use asset obtained in exchange for operating lease liability upon implementation of ASC 842 on January 1, 2019 Right Of Use Asset Obtained In Exchange for Operating Lease Liability Upon Implementation of ASC 842 on January 1, 2019 Amount of increase in right-of-use asset obtained in exchange for operating lease liability upon adoption of the lease standard (ASC 842) on January 1, 2019. Interest costs capitalized Interest Costs Capitalized Unusual or Infrequent Item, or Both [Table] Unusual or Infrequent Item, or Both [Table] Below-market tenant leases Below Market Operating Leases [Member] Below market operating leases. 2601-2641 Manhattan Beach Blvd 2601-2641 Manhattan Beach Blvd [Member] 2601-2641 Manhattan Beach Blvd Property Plant And Equipment By Type Property, Plant and Equipment, Type [Axis] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Deferred rent receivable, net Deferred Rent Receivables, Net Adoption of New Accounting Pronouncements; Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Escrow deposit Escrow Deposit Name of Property [Domain] Name of Property [Domain] Current Fiscal Year End Date Current Fiscal Year End Date $60 Million Term Loan $60M Term Loan $60 Million Term Loan [Member] $60 Million Term Loan Issuance of common stock, net Proceeds from Issuance of Common Stock Date of Acquisition Business Acquisition, Effective Date of Acquisition Estimated average lease-up period Fair Value Estimate, Property Average Lease Up Period Fair Value Estimate, Property Average Lease Up Period Dividends Payable, Date to be Paid Dividends Payable, Date to be Paid Summary of Acquired Lease Intangible Assets and Liabilities Schedule Of Acquired Lease Intangible Assets And Liabilities Table [Table Text Block] Schedule of acquired lease intangible assets and liabilities. TOTAL REVENUES Revenues Derivative [Line Items] Derivative [Line Items] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Weighted average shares of common stock outstanding - diluted (in shares) Weighted average shares of common stock outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Listings [Line Items] Entity Listings [Line Items] Reported Value Measurement Reported Value Measurement [Member] Issuance of stock Stock Issued During Period, Value, New Issues Distributions declared (in dollars per share) Distribution Made to Limited Partner, Distributions Declared, Per Unit Credit facility maximum future borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Schedule of Investments [Table] Schedule of Investments [Table] Acquired Finite Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Less: unamortized discount and deferred loan costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] London Interbank Offered Rate (LIBOR) Thirty-day LIBOR plus London Interbank Offered Rate (LIBOR) [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Total Assets Assets Shares acquired to satisfy employee tax withholding requirements on vesting restricted stock Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Preferred Stock, Liquidation Preference, Value Preferred Stock, Liquidation Preference, Value Entity Shell Company Entity Shell Company Lease liabilities Total lease liabilities Operating Lease, Liability Cover [Abstract] Cover [Abstract] Document Type Document Type Land Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Land Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Land Subsequent Event Subsequent Event [Member] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Variable Rate [Domain] Variable Rate [Domain] Repayment of notes payable Repayments of Long-term Debt Total real estate held for investment Real Estate Investment Property, at Cost COVID-19 Unusual Or Infrequent Items, Policy [Policy Text Block] Unusual Or Infrequent Items, Policy [Policy Text Block] Contingent liability Business Combination, Contingent Consideration, Liability Holdback Escrow buyer funded Holdback Escrow Buyer Funded Amount placed in escrow account by Company to pay for estimated remediation costs subject to holdback agreement. Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Cumulative distributions in excess of earnings Accumulated Distributions in Excess of Net Income Restricted Common Stock Restricted Stock [Member] Rents and other receivables Increase (Decrease) in Accounts Receivable 2023 Lessee, Operating Lease, Liability, Payments, Due Year Four Right-of-use assets obtained in exchange for new operating lease liabilities(1) Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Issuance of OP Units Issuance of 4.00% cumulative redeemable convertible preferred units Noncontrolling Interest, Increase from Subsidiary Equity Issuance Credit Facility [Axis] Credit Facility [Axis] Base Rent Base Rent [Member] Base rent. Derivative Instrument Detail [Abstract] Derivative Instrument Detail [Abstract] Property Plant And Equipment Type Property, Plant and Equipment, Type [Domain] Net assets acquired Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Net Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Net Preferred Stock Preferred Stock [Member] 2024 Share Based Compensation, Awards Vesting, Year 5 [Member] Share Based Compensation, Awards Vesting, Year 5 [Member] Equity [Abstract] Equity [Abstract] Capitalized share-based compensation Share-based Payment Arrangement, Amount Capitalized Debt service coverage ratio Debt Instrument Covenant Ratio Debt Service Coverage Ratio Minimum Represents the minimum required ratio of net operating income to debt service as per the covenants of the debt instrument. Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Additional availability Line of Credit Facility, Remaining Borrowing Capacity 4.43937% Cumulative Redeemable Convertible Preferred Units Series 1 CPOP Units [Member] Series 1 CPOP Units [Member] Maximum aggregate offering amount At-The-Market Aggregate Offering Amount The aggregate value of shares that may be sold from time to time in "at the market" offerings. Document Quarterly Report Document Quarterly Report Monthly rent expense Lessee, Operating Lease, Minimum Monthly Rent Expense Lessee, Operating Lease, Minimum Monthly Rent Expense Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Debt Instrument [Line Items] Debt Instrument [Line Items] Class of Stock [Domain] Class of Stock [Domain] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Contractual Sales Price Disposition Sales Price Contract sales price for dispositions of real estate 15650-15700 Avalon Blvd 15650-15700 S. Avalon Blvd [Member] 15650-15700 S. Avalon Blvd TOTAL EXPENSES Other Cost and Expense, Operating Proceeds from sale of real estate Proceeds from Sale of Real Estate Held-for-investment 720-750 Vernon Avenue 720-750 Vernon Avenue [Member] 720-750 Vernon Avenue Debt Instrument, Periodic Payment Debt Instrument, Periodic Payment Rents and other receivables, net Accounts Receivable, after Allowance for Credit Loss Real Estate [Table] Real Estate [Table] Entity File Number Entity File Number Schedule of Unvested Restricted Stock Activity Nonvested Restricted Stock Shares Activity [Table Text Block] Schedule Of Acquired Finite Lived Intangible Asset By Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Preferred Stock, Liquidation Preference Premium Preferred Stock, Liquidation Preference Premium Preferred Stock, Liquidation Preference Premium Operating partnership units exchanged for (in shares) Limited Partners' Capital Account, Units, Purchased Limited Partners' Capital Account, Units, Purchased Gains on sale of real estate Gain on sale of real estate Gain on sale of real estate Gains (Losses) on Sales of Investment Real Estate Document Fiscal Period Focus Document Fiscal Period Focus Other comprehensive loss attributable to common stockholders Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Share-based compensation Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Distribution Made to Limited Partner, Distribution Date Distribution Made to Limited Partner, Distribution Date The Credit Facility, $225 Million Term Loan Facility, $150 Million Term Loan Facility, $100 Million Notes, $125 Million Notes, Series 2019A and Series 2019B Notes The Credit Facility, $225 Million Term Loan Facility, $150 Million Term Loan Facility, $100 Million Notes, $125 Million Notes, Series 2019A and Series 2019B Notes [Member] The Credit Facility, $225 Million Term Loan Facility, $150 Million Term Loan Facility, $100 Million Notes, $125 Million Notes, Series 2019A and Series 2019B Notes [Member] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Earnings per share — Diluted Earnings Per Share, Diluted [Abstract] Secured Debt Secured Debt [Member] Maximum ratio of total indebtedness to total asset value Debt Instrument Covenant Ratio Of Aggregate Debt To Aggregate Asset Value Maximum Represents the maximum ratio of aggregate debt to aggregate assets as per the covenants of the debt instrument. Issuance of cumulative redeemable convertible preferred units Noncontrolling Interest, Increase from Subsidiary Equity Issuance, Preferred Amount of increase in noncontrolling interest from subsidiary issuance of preferred equity interests to noncontrolling interest holders. Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments and contingencies. Tenant security deposits Increase (Decrease) in Security Deposits Summary of COVID-19 Lease Concessions Schedule of Unusual or Infrequent Items, or Both [Table Text Block] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Statement [Line Items] Statement [Line Items] Limited Partners' Capital Account, Units Issued Limited Partners' Capital Account, Units Issued Management, leasing and development services Revenue from Contract with Customer, Excluding Assessed Tax Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] 15580 Slover Avenue 15580 Slover Avenue [Member] 15580 Slover Avenue [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Net income attributable to common stockholders - basic (in dollars per share) Earnings Per Share, Basic Common Stock, Dividends, Per Share, Declared Dividends declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Term Loan Term Loan [Member] Term loan. Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Distributions paid to common unitholders Payments of Ordinary Dividends, Noncontrolling Interest Comprehensive income attributable to Rexford Industrial Realty, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Plan Name [Axis] Plan Name [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Amortization of (premium) discount on notes payable, net Amortization of Debt Discount (Premium) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Property expenses Direct Costs of Leased and Rented Property or Equipment Investments in Real Estate Real Estate Disclosure [Text Block] Amendment Flag Amendment Flag Debt Instrument, Maturity Date Debt Instrument, Maturity Date Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Total share-based compensation Share-based Payment Arrangement, Expensed and Capitalized, Amount Dividends, Preferred Stock Dividends, Preferred Stock Change in working capital components: Increase (Decrease) in Operating Capital [Abstract] Common stock, shares outstanding (in shares) Beginning Balance (in shares) Ending Balance (in shares) Common Stock, Shares, Outstanding Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Quoted Price in Active Markets for Identical Assets and Liabilities (Level 1) Fair Value, Inputs, Level 1 [Member] Preferred Units by Name [Axis] Preferred Units by Name [Axis] Interest expense Total interest expense presented in the Consolidated Statement of Operations in which the effects of cash flow hedges are recorded (line item “Interest expense”) Interest Expense Property Average Lease Up Period Property Average Lease Up Period [Member] Measurement Input, Property Lease Up Period Class of Stock [Axis] Class of Stock [Axis] Plan Name [Domain] Plan Name [Domain] Equity Stockholders' Equity Note Disclosure [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Proceeds from sale of properties Proceeds from Sale of Real Estate Distributions paid to preferred unitholders Distribution Made to Limited Partner, Cash Distributions Paid Local Phone Number Local Phone Number Fair Value Derivative Assets (Liabilities), at Fair Value, Net Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] 2021 Share Based Compensation, Awards Vesting, Year 2 [Member] Share Based Compensation, Awards Vesting, Year 2 [Member] Total undiscounted lease payments Lessee, Operating Lease, Liability, Payments, Due Brady Way Brady Way [Member] Brady Way [Member] Net proceeds from issuance of common stock Proceeds From Issuance Of Common Stock, Net Proceeds from the issuance of common stock net of the sales agents' fee Conversion of OP units to common stock (in shares) Stock Issued During Period, Shares, Conversion of Units Total liabilities assumed Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Liabilities Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Liabilities Interest Rate Swap $100M Notional Effective August 14, 2018 Interest Rate Swap $100M Notional Effective August 14, 2018 [Member] Interest Rate Swap $100M Notional Effective August 14, 2018 Equity Offering Costs Equity Offering Costs Policy [Policy Text Block] Disclosure of accounting policy for costs associated with raising equity. Other assets Other Assets Share-based Payment Arrangement, Expensed and Capitalized, Amount Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Operating lease right-of-use assets obtained in exchange for lease liabilities subsequent to adoption of ASC 842 Right Of Use Asset Obtained In Exchange For Operating Lease Liability Related to Lease Modification Amount of increase in right-of-use asset obtained in exchange for operating lease liability related to a lease modification subsequent to January 1, 2019. Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Shares available under ATM (in shares) Common Stock, Value of Shares Available under ATM Common Stock, Value of Shares Available under At The Market Equity Offering Program Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Preferred Stock, Dividend Rate, Percentage Preferred Unit, Distribution Rate, Percentage Preferred Stock, Dividend Rate, Percentage Derivative Instruments and Hedging Activities Derivatives, Policy [Policy Text Block] Renewal term Lessee, Operating Lease, Renewal Term Entity Current Reporting Status Entity Current Reporting Status Unvested Performance Unit Distribution Sharing Percentage Unvested Performance Unit Distribution Sharing Percentage Unvested performance unit distribution sharing percentage. Future Minimum Base Rent Under Non-cancelable Operating Leases Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Number Of Properties Securing Loan Number Of Properties Securing Loan Number of properties securing loan. Name of Property [Axis] Name of Property [Axis] Cash, FDIC Insured Amount Cash, FDIC Insured Amount NET INCOME ATTRIBUTABLE TO REXFORD INDUSTRIAL REALTY, INC. Net Income (Loss) Attributable to Parent Deferred rent receivable, net Increase (Decrease) In Deferred Rent Receivables, Net Increase (Decrease) In Deferred Rent Receivables, Net Operating Leases, Future Minimum Payments Receivable [Abstract] Lessor, Operating Lease, Payments, Rolling Maturity [Abstract] Common Stock Common Stock [Member] Valuation of Receivables Receivable [Policy Text Block] Construction in progress Development in Process Minimum ratio of NOI unsecured interest expense Debt Instrument Covenant Ratio Of Unencumbered NOI To Unsecured Interest Expense Minimum Represents the minimum required ratio of unencumbered NOI to unsecured interest expense as per the covenants of the debt instrument. Construction Employees Construction Employees [Member] Construction Employees Summary of Properties Sold Dispositions Table [Table Text Block] Summary information related to properties sold during the reported period, including address, location, square footage, date of disposal, sales price and gain (loss) recorded. Lessor, Operating Lease, Rentable Square Feet Lessor, Operating Lease, Rentable Square Feet Lessor, Operating Lease, Rentable Square Feet Other assumed liabilities(2) Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed, Working Capital Liabilities Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed, Working Capital Liabilities Leases [Abstract] Leases [Abstract] Debt Issuance Costs Debt, Policy [Policy Text Block] Debt Instrument [Axis] Debt Instrument [Axis] 5.875% Series B Cumulative Redeemable Preferred Stock Series B Preferred Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Issuance of preferred stock, net Proceeds from Issuance of Preferred Stock and Preference Stock Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] NET INCOME Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Noncontrolling Interest [Domain] Noncontrolling Interest [Domain] [Domain] for Noncontrolling Interest [Axis] Cumulative effect of adoption of ASC 842 Cumulative Effect on Retained Earnings, Net of Tax Operating lease cost Operating Lease, Cost Entity Small Business Entity Small Business Interest rate swap agreement, maturity date Derivative, Maturity Date Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] 2025 Lessor, Operating Lease, Payments to be Received, Rolling Year Five Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities [Member] Real Estate [Abstract] Real Estate [Abstract] Entity Filer Category Entity Filer Category Investments in real estate, net Increase (Decrease) In Real Estate Investments, Net Increase (Decrease) In Real Estate Investments, Net 12133 Greenstone Avenue 12133 Greenstone Avenue [Member] 12133 Greenstone Avenue Expensed share-based compensation Share-based Payment Arrangement, Expense Interest Rate Swap Interest Rate Swap [Member] Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total Liabilities and Equity Liabilities and Equity At The Market Equity Offering Program, $550 Million At The Market Equity Offering Program, $550 Million [Member] At The Market Equity Offering Program, $550 Million [Member] Entity Address, City or Town Entity Address, City or Town Summary of Impact of Interest Rate Swaps on Consolidated Financial Statements Derivative Instruments, Gain (Loss) [Table Text Block] Concentration risk, percentage Concentration Risk, Percentage Acquired lease intangible assets, net Finite-Lived Intangible Assets, Period Increase (Decrease) Credit Facility And Term Loan Facility, 225 and 150 Million Credit Facility And Term Loan Facility, 225 and 150 Million [Member] Credit Facility And Term Loan Facility, 225 and 150 Million [Member] Dividends and distributions payable Accrual of dividends and distributions Dividends Payable Interest rate swap agreement, effective date Derivative, Inception Date Acquisition Purchase Price Acquisition Purchase Price The contractual price of a business combination or asset acquisition OPERATING EXPENSES Operating Expenses [Abstract] Common stock, shares reserved for future issuance Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance Debt Instrument [Table] Schedule of Long-term Debt Instruments [Table] 6687 Flotilla Street Flotilla Street [Member] Flotilla Street [Member] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Lessor, Operating Lease, Term of Contract Lessor, Operating Lease, Term of Contract Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Investments in real estate, net Real Estate Investment Property, Net 12772-12746 San Fernando Road 12772-12746 San Fernando Road [Member] 12772-12746 San Fernando Road Basis of Presentation and Principles of Consolidation Consolidation, Policy [Policy Text Block] 7612-7642 Woodwind Drive 7612-7642 Woodwind Drive [Member] 7612-7642 Woodwind Drive Rexford Industrial Realty, Inc. stockholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus Operating Lease, Variable Lease Income Operating Lease, Variable Lease Income Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Carrying Value and Estimated Fair Value of Notes Payable Fair Value, by Balance Sheet Grouping [Table Text Block] Subsequent Events Subsequent Events [Text Block] Vested LTIP Units Vested LTIP Units [Member] Vested LTIP Units [Member] REVENUES Revenues [Abstract] Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five 2722 Fairview Street Fairview Street, 2722 [Member] Fairview Street, 2722 [Member] Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Noncash or Part Noncash Acquisitions by Unique Description [Axis] Noncash or Part Noncash Acquisitions by Unique Description [Axis] Acquisition, preferred units issued (in units) Acquisition, Preferred Units, Issued Acquisition, Preferred Units, Issued Shares acquired to satisfy employee tax withholding requirements on vesting restricted stock (in shares) Shares tendered in accordance with terms of plan to satisfy tax withholding (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Award Type [Axis] Award Type [Axis] Performance period Share Based Compensation Arrangement By Share Based Payment Award, Performance Period Share Based Compensation Arrangement By Share Based Payment Award, Performance Period of Award Estimate of Fair Value Measurement Fair Value, Concentration of Risk, Market Risk Management, Gap Analysis [Member] Class of Stock [Line Items] Class of Stock [Line Items] Subsequent Events [Abstract] Subsequent Events [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Deferred leasing costs, net Increase (Decrease) In Deferred Costs, Leasing, Net Increase (Decrease) In Deferred Costs, Leasing, Net Preferred Stock, Dividends Per Share, Declared Dividends per share, declared (in dollars per share) Preferred Stock, Dividends Per Share, Declared In-place lease intangibles Finite-Lived Intangible Asset, Acquired-in-Place Leases Less: net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Estimated remediation costs Estimated Remediation Costs Estimated remediation, processing and oversight costs. Cash paid for amounts included in the measurement of operating lease liabilities Operating Lease, Payments Acquired property, measurement input Acquired Property, Measurement Input Acquired Property, Measurement Input Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Number of real estate properties Number of Real Estate Properties Subsequent Event Type [Domain] Subsequent Event Type [Domain] Acquired lease intangible liabilities, gross Finite Lived Intangible Liability Off Market Lease Unfavorable Gross Finite lived intangible liability off market lease unfavorable gross. Amortization of debt issuance costs Amortization of Debt Issuance Costs Subsequent Event [Line Items] Subsequent Event [Line Items] Leases Lessee, Operating Leases [Text Block] Accrual for capital expenditures Capital Expenditures Incurred but Not yet Paid Interest Rate Swap $150M Notional Effective July 22, 2019 Interest Rate Swap $150M Notional Effective July 22, 2019 [Member] Interest Rate Swap $150M Notional Effective July 22, 2019 [Member] Total assets acquired Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Assets Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Assets Liabilities Liabilities [Abstract] Document Period End Date Document Period End Date 701-751 Kingshill Place 701-751 Kingshill Place [Member] 701-751 Kingshill Place Statement [Table] Statement [Table] Cumulative Distributions in Excess of Earnings Accumulated Distributions in Excess of Net Income [Member] Entity Registrant Name Entity Registrant Name Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] Extension period Debt Instrument Term Extension Period Debt instrument term extension period. Estimated remaining life Property, Plant and Equipment, Useful Life Deferred leasing costs, net Deferred Costs, Leasing, Net Number of major tenants Concentration Risk, Number of Major Customers Concentration Risk, Number of Major Customers Site Improvements Land Improvements [Member] Assets and Liabilities Measured at Fair Vale on a Recurring Basis by Level within Fair Value Hierarchy Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Shares that may be issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Maximum Maximum [Member] Measurement Input Type [Domain] Measurement Input Type [Domain] 2022 Lessee, Operating Lease, Liability, Payments, Due Year Three Related Party Related Party [Domain] NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS Net Income (Loss) Available to Common Stockholders, Basic Above-market tenant leases Above Market Leases [Member] Ownership [Axis] Ownership [Axis] Common stock share price (in dollars per share) Shares Issued, Price Per Share Secured Debt Secured Debt Net below market tenant leases Net Above Below Market Tenant Leases [Member] Net above (below) market tenant leases. 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] Above-market lease intangibles Finite-Lived Intangible Asset, Off-market Lease, Favorable, Gross Accumulated accretion Finite Lived Intangible Liability Accumulated Accretion Accumulated amount of accretion of finite lived intangible liabilities. Entity Tax Identification Number Entity Tax Identification Number Revenue Recognition Revenue [Policy Text Block] Intangible Assets Intangible Assets Disclosure [Text Block] Net income attributable to common stockholders - diluted (in dollars per share) Earnings Per Share, Diluted Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] 2700-2722 South Fairview Street 2700-2722 South Fairview Street [Member] 2700-2722 South Fairview Street Trading Symbol Trading Symbol Minimum Minimum [Member] 4.00% Cumulative Redeemable Convertible Preferred Units Series 2 CPOP Units Series 2 CPOP Units [Member] Series 2 CPOP Units [Member] Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Summary of Fair Value of Amounts Recognized Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Series B Preferred Units Series B Preferred Units [Member] Series B Preferred Units [Member] Remaining lease term Lessee, Operating Lease, Remaining Term Of Contract Lessee, Operating Lease, Remaining Term Of Contract Buildings and improvements Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Buildings Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Buildings Less: earnings allocated to participating securities Less: Net income attributable to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Debt Instrument, Maturity Date Range, End Debt Instrument, Term Sales-type lease receivable Increase (Decrease) in Leasing Receivables Balance Sheet Location [Domain] Balance Sheet Location [Domain] Legal Entity [Axis] Legal Entity [Axis] Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Purchase Price Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Purchase Price Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Purchase Price Deferral of Base Rent Deferral of Base Rent Deferral of Base Rent Operating Lease, Liability, Payments, Leases Not Commenced Operating Lease, Liability, Payments, Leases Not Commenced Amount of lessee's undiscounted obligation for lease payments for operating lease that has not commenced. Statistical Measurement [Domain] Statistical Measurement [Domain] 960-970 Knox Street 960-970 Knox Street [Member] 960-970 Knox Street Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Thereafter Lessor, Operating Lease, Payments to be Received, after Rolling Year Five Amount of loss recognized in AOCI on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Partnership Interest Partnership Interest [Member] Entity [Domain] Entity [Domain] Minimum tangible net worth required Debt Instrument Covenant Specified Amount For Computing Tangible Net Worth To Be Maintained Represents the specified amount for computing the tangible net worth to be maintained as per the covenants of the debt instrument. Income tax provision Income Tax Expense (Benefit) Lease reclassification from operating lease to sales-type lease: Lease Reclassification [Abstract] Lease Reclassification $100M Notes $100 Million Notes [Member] $100 Million Notes [Member] 3927 Oceanic Drive 3927 Oceanic Drive [Member] 3927 Oceanic Drive Amounts reclassified from accumulated other comprehensive loss (income) to interest expense Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Vesting Vesting [Axis] 2021 Lessee, Operating Lease, Liability, Payments, Due Year Two Sales-type lease receivable Noncash Increase in Sales-Type Lease Receivable Related To Lease Reclassification Noncash Increase in Sales-Type Lease Receivable Total Rental Revenues Total Rental Revenues [Member] Total Rental Revenues [Member] Area of real estate property additionally managed Area Of Real Estate Property Additionally Managed Area of real estate property managed Number of real estate properties additionally managed Number Of Real Estate Properties Additionally Managed Number of real estate properties additionally managed but not owned. Tenant improvements Tenant Improvements Maximum ratio of recourse debt to total asset Debt Instrument Covenant Ratio Of Recourse Debt To Aggregate Asset Value Maximum Represents the maximum ratio of secured recourse debt to aggregate assets as per the covenants of the debt instrument. Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Axis] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary of significant accounting policies. City Area Code City Area Code Preferred Units, Class [Domain] Preferred Units, Class [Domain] Less other comprehensive loss attributable to noncontrolling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest In-place lease intangibles Leases, Acquired-in-Place [Member] Title of 12(b) Security Title of 12(b) Security Preferred unit distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Preferred Interest Holders Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders represented by preferred units. Related Party Transactions By Related Party Related Party [Axis] Loans Assumed Loans Assumed Fair Value Estimate of Fair Value Measurement [Member] REIT annual taxable income distribution requirement percentage Reit Taxable Income Distribution Requirement Percentage Reit taxable income distribution requirement percentage. Earnings Per Share [Abstract] Earnings Per Share [Abstract] Fair Value By Fair Value Hierarchy Level Fair Value Hierarchy and NAV [Axis] 2410-2420 Santa Fe Avenue 2410-2420 Santa Fe Avenue [Member] 2410-2420 Santa Fe Avenue Acquired lease intangible assets(1) Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Lease Intangible Assets Asset Acquisition Recognized Identifiable Assets Acquired and Liabilities Assumed Acquired Lease Intangible Assets Distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Maturities of Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Amended and Restated 2013 Incentive Award Plan Amended and Restated 2013 Incentive Award Plan [Member] Amended And Restated 2013 Incentive Award Plan Principal amount Total Long-term Debt, Gross Renewal options Lessee, Operating Lease, Number Of Renewal Options Lessee, Operating Lease, Number Of Renewal Options ASSETS Assets [Abstract] 5.625% Series C Cumulative Redeemable Preferred Stock Series C Preferred Stock [Member] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Number of properties sold Number of Real Estate Properties Sold Number of Real Estate Properties Sold Debt Instrument, Unamortized Discount (Premium), Net Debt Instrument, Unamortized Discount (Premium), Net Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Basis spread on variable rate if additional investment grade rating attained Debt Instrument, Basis Spread On Variable Rate Investment Grade Rating Pricing Structure Percentage points added to the reference rate to compute the variable rate on the debt instrument, if the pricing structure is converted to be based on attaining two investment grade ratings. Total lease cost Lease, Cost 22895 Eastpark Drive 22895 Eastpark Drive [Member] 22895 Eastpark Drive [Member] Number Of Acres Number Of Acres Number Of Acres Summary of the Components of Changes in Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Dividends Declared Dividends Declared [Table Text Block] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Rental income Operating Lease, Lease Income 11076-11078 Fleetwood Street 11076-11078 Fleetwood Street [Member] 11076-11078 Fleetwood Street TOTAL OPERATING EXPENSES Operating Expenses Performance Units Performance Shares [Member] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary of significant accounting policies. OTHER EXPENSES Nonoperating Income (Expense) [Abstract] Effect of dilutive securities - performance units (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Office Leases Office Building [Member] Acceleration of Concessions Acceleration of Concessions Acceleration of future rent concessions to cover base rent. Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Measurement Basis [Axis] Measurement Basis [Axis] Supplemental disclosure of noncash transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Furniture, fixtures and equipment Fixtures and Equipment, Gross Other Significant Noncash Transaction, Value of Consideration Given Other Significant Noncash Transaction, Value of Consideration Given Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Acquired lease intangible assets, net Acquired lease intangible assets, net Finite-Lived Intangible Assets, Net Senior Notes, 100 Million, 125 Million, Series 2019A and Series 2019B Senior Notes, 100 Million, 125 Million, Series 2019A and Series 2019B [Member] Senior Notes, 100 Million, 125 Million, Series 2019A and Series 2019B [Member] Unsecured Credit Facility Unsecured Credit Facility [Member] Unsecured credit facility. Conversion of OP units to common stock Stock Issued During Period, Value, Conversion of Units $100M Term Loan Facility $100 Million Term Loan [Member] $100 Million Term Loan Operating Lease, Lease Income, Lease Payments Operating Lease, Lease Income, Lease Payments Acquired lease intangible liabilities, net Acquired lease intangible liabilities, net Off-market Lease, Unfavorable Debt Disclosure [Abstract] Debt Disclosure [Abstract] Acquired indefinite-lived intangible Other Indefinite-lived Intangible Assets Real Estate Properties [Domain] Real Estate Properties [Domain] Summary of Future Minimum Debt Payments Schedule of Maturities of Long-term Debt [Table Text Block] Derivative Instrument [Axis] Derivative Instrument [Axis] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments and contingencies. Statistical Measurement [Axis] Statistical Measurement [Axis] Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Number Of Mortgage Loans Assumed Number Of Mortgage Loans Assumed Number Of Mortgage Loans Assumed Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] 121 West 33rd Street 121 West 33rd Street [Member] 121 West 33rd Street Amended 2013 Incentive Award Plan 2013 Incentive Award Plan [Member] 2013 Incentive Award Plan Line Of Credit Facility, Number Of Extensions Line Of Credit Facility, Number Of Extensions Line Of Credit Facility, Number Of Extensions Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Current Notional Value Derivative, Notional Amount 2022 Long-term Debt, Maturities, Repayments of Principal in Year Three Earnings per share — Basic Earnings Per Share, Basic [Abstract] Sublease income Sublease Income 5160 Richton Street 5160 Richton Street [Member] 5160 Richton Street Acquisition of investments in real estate Payments to Acquire Commercial Real Estate Sale of real estate, transaction costs Sales Of Investment Real Estate, Transaction Costs Sales Of Investment Real Estate, Transaction Costs Dividends paid to preferred stockholders Payments of Ordinary Dividends, Preferred Stock and Preference Stock Properties Acquired on March 5, 2020 and June 19, 2020 Properties Acquired on March 5, 2020 and June 19, 2020 [Member] Properties Acquired on March 5, 2020 Date of Disposition Disposal Date Notes Payable Debt Disclosure [Text Block] Interest Strike Rate Derivative, Fixed Interest Rate Operating partnership units outstanding (in shares) Limited Partners' Capital Account, Units Outstanding Organization Business Description and Basis of Presentation [Text Block] Variable lease cost Variable Lease, Cost Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Acquired lease intangible liabilities(3) Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Lease Liabilities Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Lease Liabilities Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Equity Based Compensation Compensation Related Costs, Policy [Policy Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Restricted cash Restricted Cash Increase in interest expense Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net 11832-11954 La Cienega Blvd 11832-11954 La Cienega Blvd [Member] 11832-11954 La Cienega Blvd 2024 Lessor, Operating Lease, Payments to be Received, Rolling Year Four Entity Central Index Key Entity Central Index Key Balance at January 1, 2020 (in shares) Balance at March 31, 2020 (in shares) Non-vested shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unrecognized compensation expense related to non-vested shares Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Sales-type lease receivable Sales-type Lease, Lease Receivable Entity Emerging Growth Company Entity Emerging Growth Company Noncontrolling Interests Noncontrolling Interest [Member] 2024 Long-term Debt, Maturities, Repayments of Principal in Year Five Rentable Square Feet Rentable Square Feet Net Rentable Area Senior Notes Senior Notes [Member] Unusual or Infrequent Item, or Both [Domain] Unusual or Infrequent Item, or Both [Domain] Sale of Stock [Domain] Sale of Stock [Domain] Equity based compensation expense Share-based Payment Arrangement, Noncash Expense Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Interest Rate Swaps Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative [Table] Derivative [Table] Security Deposits Application of Security Deposit Application of tenant security deposits to cover base rent. Income Taxes Income Tax, Policy [Policy Text Block] Credit Facility [Domain] Credit Facility [Domain] October 1, 2020 - December 31, 2020 Share Based Compensation, Awards Vesting, Remainder of Fiscal Year [Member] Share Based Compensation, Awards Vesting, Remainder of Fiscal Year [Member] October 1, 2020 - December 31, 2020 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Base Rate Base Rate [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Dividends Payable, Date of Record Dividends Payable, Date of Record Operating Partnership Operating Partnership [Member] Operating partnership. Office Leases Building [Member] Summary of Amortization or Accretion Recorded During the Period Related to Acquired Lease Intangibles Schedule Of Finite Lived Intangible Assets And Liabilities Amortization Accretion Expense Table [Table Text Block] Tabular disclosure of the amount of amortization or accretion recorded during the period related to our acquired lease intangible assets and liabilities. Disposal Group Name [Domain] Disposal Group Name [Domain] Underwritten Public Offering Underwritten Public Offering [Member] Underwritten Public Offering [Member] Concentration Risk By Type Concentration Risk Type [Axis] $225M Term Loan Facility $225 Million Term Loan Facility [Member] $225 Million Term Loan Facility Dividends, Common Stock Dividends, Common Stock 2021 Lessor, Operating Lease, Payments to be Received, Next Rolling Twelve Months Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Fixed interest rate Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Other acquired assets(2) Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed Working Capital Assets Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed Working Capital Assets Prepaid rents Advance Rent Operating Lease Fixed And Variable Lease Payments Operating Lease Fixed And Variable Lease Payments Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Excludes amount of non-cash amortization of intangible asset (liability) for above and below market leases. Measurement Input Type [Axis] Measurement Input Type [Axis] LIABILITIES & EQUITY Liabilities and Equity [Abstract] Total Lessor, Operating Lease, Payments to be Received Share-based compensation (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Minimum ratio of EBITDA to fixed charges Debt Instrument Covenant Ratio Of Adjusted EBITDA To Fixed Charges Minimum Represents the minimum required ratio of adjusted EBITDA to fixed charges as per the covenants of the debt instrument. Intangible Assets [Abstract] Intangible Assets, Net (Excluding Goodwill) [Abstract] Less: preferred stock dividends Less: Preferred stock dividends Preferred Stock Dividends, Income Statement Impact Number Of Additional Extension Periods Number Of Additional Extension Periods Number of additional extension periods. CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Other comprehensive income (loss): cash flow hedge adjustment Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Type of Adoption [Domain] Type of Adoption [Domain] Derivative Contract [Domain] Derivative Contract [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Summary of Acquired Wholly Owned Property Acquisitions Schedule of Asset Acquisitions By Acquisition [Table Text Block] Schedule of Asset Acquisitions By Acquisition [Table Text Block] Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Executive Officer Executive Officer [Member] Notes payable Carrying value Carrying value Long-term Debt Interest Rate Swap $100M Notional Effective December 14, 2018 Interest Rate Swap $100M Notional Effective December 14, 2018 [Member] Interest Rate Swap $100M Notional Effective December 14, 2018 Segment Reporting Segment Reporting, Policy [Policy Text Block] Fair Value Measurements Fair Value Hierarchy Fair Value Hierarchy and NAV [Domain] Proceeds from notes payable Proceeds from Issuance of Long-term Debt Acquisition related deposits Deposits Assets 11600 Los Nietos Road 11600 Los Nietos Road [Member] 11600 Los Nietos Road 2024 Lessee, Operating Lease, Liability, Payments, Due Year Five $125M Notes $125 Million Notes [Member] $125 Million Notes [Member] Real Estate [Line Items] Real Estate [Line Items] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Dispositions Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] 25781 Atlantic Ocean Drive 25781 Atlantic Ocean Drive [Member] 25781 Atlantic Ocean Drive Funds from operations percentage Distribution Maximum Funds From Operations Percentage Represents the maximum amount allowed to be distributed expressed as a percentage of funds from operations. Sale of Stock [Axis] Sale of Stock [Axis] Leases Lessor, Operating Leases [Text Block] Amended Term Loan Facility, $100 Million Amended Term Loan Facility, $100 Million [Member] Amended Term Loan Facility, $100 Million [Member] Subsequent Event [Table] Subsequent Event [Table] Total Stockholders’ Equity Parent [Member] Weighted average remaining vesting period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Accounting Policies [Abstract] Accounting Policies [Abstract] Prepaid rents Increase (Decrease) in Prepaid Rent Additional Paid-in Capital Additional Paid-in Capital [Member] Noncash or Part Noncash Acquisition, Name [Domain] Noncash or Part Noncash Acquisition, Name [Domain] Title of Individual [Domain] Title of Individual [Domain] Disposal Group Name [Axis] Disposal Group Name [Axis] OP Units Operating Partnership Units [Member] Operating Partnership Units Adjustment to rental income resulting from lease collectability assessment Adjustment To Rental Income Resulting From Lease Collectibility Assessment Adjustment to rental income resulting from assessment of collectibility of tenant lease payments. Underwritten Public Offering, Option Securities Underwritten Public Offering, Option Securities [Member] Underwritten Public Offering, Option Securities $75M Series 2019B Notes Series 2019B Guaranteed Senior Notes [Member] Series 2019B Guaranteed Senior Notes [Member] 2205 126th Street 2205 126th Street [Member] 2205 126th Street Fair Value Measurement [Domain] Fair Value Measurement [Domain] Interest income Interest Income, Operating Fixed interest rate Debt Instrument, Interest Rate, Stated Percentage Below-market lease intangibles, weighted average amortization period Below Market Lease, Weighted Average Useful Life Below Market Lease, Weighted Average Useful Life Debt issuance costs Payments of Financing Costs 2021 Long-term Debt, Maturities, Repayments of Principal in Year Two Entity Address, Address Line One Entity Address, Address Line One Chief Executive Officer Chief Executive Officer [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Tenant improvements Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed Tenant Improvements Asset Acquisition Recognized Identifiable Assets Acquired And Liabilities Assumed Tenant Improvements Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Entity Address, State or Province Entity Address, State or Province Business Acquisition [Axis] Business Acquisition [Axis] Customer Concentration Risk Customer Concentration Risk [Member] Payments for Deposits on Real Estate Acquisitions Payments for Deposits on Real Estate Acquisitions Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Fair Value Assets And Liabilities Measured On Recurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Area of real estate property (square feet) Area of Real Estate Property Related Party Transaction [Line Items] Related Party Transaction [Line Items] 1055 Sandhill Avenue 1055 Sandhill Avenue [Member] 1055 Sandhill Avenue 2022 Share Based Compensation, Awards Vesting, Year 3 [Member] Share Based Compensation, Awards Vesting, Year 3 [Member] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Commitment fee percentage if pricing structure is converted to be based on an investment-grade rating Line of Credit Facility Commitment Fee Percentage Investment Grade Rating Pricing Structure The fee if the pricing structure is converted to be based on attaining two investment grade ratings, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. Investments, All Other Investments [Abstract] Investments, All Other Investments [Abstract] Unusual or Infrequent Item, or Both [Line Items] Unusual or Infrequent Item, or Both [Line Items] Business Acquisition [Line Items] Business Acquisition [Line Items] General and administrative General and Administrative Expense Senior Unsecured Credit Facility, 600 Million Senior Unsecured Credit Facility, 600 Million [Member] Senior Unsecured Credit Facility, 600 Million [Member] Unsecured Debt Unsecured Debt Summary of Interest Rate Swap Agreement Schedule of Derivative Instruments [Table Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Entity Interactive Data Current Entity Interactive Data Current Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Vesting Schedule of the Unvested Shares of Restricted Stock Outstanding Restricted Stock Awards Shares Non Vested Awards By Expected Vesting Period Table [Table Text Block] Tabular disclosure of the number of non-vested restricted stock awards outstanding by the period expected to vest at the date of the latest statement of financial position. Repurchase of common shares to satisfy employee tax withholding requirements Payment, Tax Withholding, Share-based Payment Arrangement Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 2023 Share Based Compensation, Awards Vesting, Year 4 [Member] Share Based Compensation, Awards Vesting, Year 4 [Member] Earnings Per Share Earnings Per Share [Text Block] $150M Term Loan Facility $150 Million Term Loan Facility [Member] $150 Million Term Loan Facility Interest rate swap asset Interest Rate Derivative Assets, at Fair Value Award Type [Domain] Award Type [Domain] 2023 Lessor, Operating Lease, Payments to be Received, Rolling Year Three Straight-line rent Straight Line Rent Revenue from management and leasing services Revenue from Related Parties Other assets Increase (Decrease) in Other Operating Assets Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Revolving Credit Facility Revolving Credit Facility [Member] Issuance of stock (in shares) Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues Maximum ratio of secured debt to total asset value Debt Instrument Covenant Ratio Of Secured Debt To Aggregate Asset Value Maximum Represents the maximum ratio of secured debt to aggregate assets as per the covenants of the debt instrument. Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Ownership [Domain] Ownership [Domain] Dividends paid to common stockholders Payments of Ordinary Dividends, Common Stock Entity Listings [Table] Entity Listings [Table] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Consolidated Entities [Axis] Consolidated Entities [Axis] Debt Instrument, Periodic Payment, Principal Debt Instrument, Periodic Payment, Principal Notes payable(4) Long-term Debt, Fair Value Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total Liabilities Liabilities Gilbert/La Palma Gilbert La Palma [Member] Gilbert/La Palma. Tenant security deposits Security Deposit Liability Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Common Stock, $0.01 par value per share, 489,950,000 authorized and 123,788,591 and 113,793,300 shares outstanding at September 30, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Holdback Escrow seller funded Holdback Escrow Seller Funded Amount placed in escrow account by seller to pay for estimated remediation costs subject to Holdback Agreement. Gross proceeds from the issuance of common stock Gross Proceeds From Issuance Of Common Stock Gross proceeds from issuance of common stock before the effect of offering costs Vesting Vesting [Domain] October 1, 2020 - December 31, 2020 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Indemnification asset Recorded Third-Party Environmental Recoveries Receivable Amortization of (below) above market lease intangibles, net Amortization of above and below Market Leases Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Partners' Capital Account, Units Partners' Capital Account, Units Series A Preferred Units Series A Preferred Units [Member] Series A Preferred Units [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Other comprehensive loss before reclassifications Other Comprehensive Income (Loss), before Reclassifications, before Tax Maximum ratio of unsecured debt to the value of the unencumbered asset pool Debt Instrument Covenant Ratio Of Unsecured Debt To Unencumbered Asset Value Maximum Represents the maximum ratio of unsecured debt to unencumbered assets as per the covenants of the debt instrument. Weighted average shares of common stock outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Right-of-use assets Operating Lease, Right-of-Use Asset Equity Components [Axis] Equity Components [Axis] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] In-place lease intangibles Leases, Acquired-in-Place, Market Adjustment [Member] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Total stockholders’ equity Stockholders' Equity Attributable to Parent Interest Rate Swap $125M Notional Effective February 14, 2018 Interest Rate Swap $125M Notional Effective February 14, 2018 [Member] Interest Rate Swap $125M Notional Effective February 14, 2018 Amortization of in-place lease intangibles Amortization of Intangible Assets Concentration Risk Type Concentration Risk Type [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Assets Held for Sale Real Estate Held for Development and Sale, Policy [Policy Text Block] 2022 Lessor, Operating Lease, Payments to be Received, Rolling Year Two Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Assumption of debt in connection with acquisition of real estate including loan premium Noncash or Part Noncash Acquisition, Debt Assumed Capital expenditures Payments for Capital Improvements Debt instrument - contingent additional borrowings Debt Instrument - Contingent Additional Borrowings Additional borrowing capacity under a debt instrument which is contingent upon the satisfaction of specified conditions described in the credit agreement. Concentration Risk By Benchmark Concentration Risk Benchmark [Axis] Land Land Schedule Of Related Party Transactions By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Fair Value Measurements Fair Value Disclosures [Text Block] Accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Return of (payments for) deposits on real estate acquisitions Payments for (Proceeds from) Deposits on Real Estate Acquisitions Lease Cost Lease, Cost [Table Text Block] Noncontrolling Interest [Axis] Noncontrolling Interest [Axis] Noncontrolling Interest [Axis] Investments in Real Estate Real Estate, Policy [Policy Text Block] Deferred leasing costs Payments for Commissions Buildings and improvements Investment Building and Building Improvements Acquired lease intangible assets, gross Finite-Lived Intangible Assets, Gross Offering costs Offering costs Offering Costs Specific incremental costs directly attributable to offering of securities. Cash paid for interest (net of capitalized interest of $3,106 and $2,993 for the nine months ended September 30, 2020 and 2019, respectively) Interest Paid, Excluding Capitalized Interest, Operating Activities Noncontrolling interest percentage ownership in Operating Partnership Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Preferred stock, $0.01 par value per share, 10,050,000 shares authorized, at September 30, 2020 and December 31, 2019 Preferred Stock, Value, Issued Eurodollar Eurodollar [Member] Variable Rate [Axis] Variable Rate [Axis] Number of Buildings Number Of Buildings Acquired Number of buildings acquired. Commitments for tenant improvements and construction work Other Commitment Security Exchange Name Security Exchange Name LTIP Units LTIP Units [Member] LTIP Units Total Fair Value Fair Value, Inputs, Level 1, 2 and 3 [Member] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Fixed Rate Debt Fixed Rate Debt [Member] Fixed rate debt. Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Additional paid in capital Additional Paid in Capital, Common Stock Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Equity Component [Domain] Equity Component [Domain] Series C Preferred Units Series C Preferred Units [Member] Series C Preferred Units [Member] Real estate taxes and insurance costs capitalized Real Estate Taxes And Insurance Costs Capitalized Real estate taxes and insurance costs capitalized as property costs during periods in which activities necessary to get a property ready for its intended use are in progress. Document Transition Report Document Transition Report Fed Funds Effective Rate Overnight Index Swap Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Deferred loan costs, net Debt Issuance Costs, Net Minimum percentage of equity proceeds to be used in minimum tangible net worth calculation Debt Instrument Covenant Percentage Of Net Proceeds Raised In Future Equity Issuances Used For Computing Tangible Net Worth To Be Maintained Represents the percentage of net proceeds raised in all future equity issuances used for computing the tangible net worth to be maintained as per the covenants of the debt instrument. Unsecured Revolving Credit Facility, $500 Million Unsecured Revolving Credit Facility, $500 Million [Member] Unsecured Revolving Credit Facility, $500 Million [Member] Deferred Leasing Costs Deferred Charges, Policy [Policy Text Block] Measurement Input, Cap Rate Measurement Input, Cap Rate [Member] Consolidated Entities [Domain] Consolidated Entities [Domain] Line of Credit Line of Credit [Member] Weighted average amortization period Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Income Statement [Abstract] Income Statement [Abstract] Interest rate swap liability Interest Rate Swap Liability Interest Rate Derivative Liabilities, at Fair Value AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Balance Sheet Location [Axis] Balance Sheet Location [Axis]