Statement of Cash Flows [Abstract] Capitalized interest Interest Paid, Capitalized Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2017 Omnibus Share Plan Omnibus Share Plan, 2017 [Member] Omnibus Share Plan, 2017 [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Initial Formation Awards Initial Formation Awards [Member] Initial Formation Awards [Member] Long-term incentive partnership units Long-Term Incentive Partnership Units [Member] Long-Term Incentive Partnership Units [Member] Out-performance award units Out-Performance Award Units [Member] Out-Performance Award Units [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] JBG Companies JBG Companies [Member] JBG Companies [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Vesting period one Share-based Compensation Award, Tranche One [Member] Vesting period two Share-based Compensation Award, Tranche Two [Member] Vesting period three Share-based Compensation Award, Tranche Three [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Trustee Director [Member] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Subsequent Event [Line Items] Subsequent Event [Line Items] Share-based compensation arrangement, number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Equity grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Value of stock granted from share-based compensation plans Stock Granted, Value, Share-based Compensation, Gross Price per share of stock issued for acquisition (in dollars per share) Business Acquisition, Share Price Percentage of vesting rights for each tranche Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Deferred compensation arrangement, number of individuals awarded Deferred Compensation Arrangement With Individual, Number Of Individuals Deferred Compensation Arrangement With Individual, Number Of Individuals Deferred compensation arrangement, value Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued Number of vesting installments under share-based arrangement Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Rights, Number Of Installments Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Rights, Number Of Installments Vesting period for share-based compensation plans Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Accounting Policies [Abstract] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Other Assets, Net Other Assets Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent Equity Parent [Member] Noncontrolling Interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] BALANCE (beginning of period) Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net income attributable to JBG SMITH Properties Net Income (Loss) Attributable to Parent Deferred compensation shares and options, net Stock Issued During Period, Value, Employee Benefit Plan Contributions from Vornado Realty Trust, net Stockholders' Equity Note, Spinoff Transaction BALANCE, (end of period) Equity Method Investments and Joint Ventures [Abstract] Investments in Unconsolidated Real Estate Ventures Equity Method Investments and Joint Ventures Disclosure [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Mortgages Mortgages [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Variable interest rate Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate Fixed interest rate Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Interest rate on payable to Vornado Related Party Transaction, Rate Variable rate amount Long-term Debt, Percentage Bearing Variable Interest, Amount Fixed rate amount Long-term Debt, Percentage Bearing Fixed Interest, Amount Mortgages payable Long-term Debt, Gross Unamortized deferred financing costs and premium/discount, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Mortgages payable, net Long-term Debt Payable to Vornado Realty Trust Due to Related Parties Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving credit facility Revolving Credit Facility [Member] Tranche A-1 Term Loan Tranche A-1 Term Loan Credit Facility [Member] Tranche A-1 Term Loan Credit Facility [Member] Tranche A-2 Term Loan Tranche A-2 Term Loan Credit Facility [Member] Tranche A-2 Term Loan Credit Facility [Member] Line of credit Line of Credit [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Term of debt Debt Instrument, Term Number of debt extension options Debt Instrument, Number Of Term Extension Options Debt Instrument, Number Of Term Extension Options Debt extension option period Debt Instrument, Extension Option, Term Debt Instrument, Extension Option, Term Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Credit drawn from facility Long-term Line of Credit Fees and expenses on debt Debt Instrument, Fee Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Real Estate Properties [Table] Schedule of Real Estate Properties [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliate Affiliated Entity [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Vornado Vornado Realty Trust [Member] Vornado Realty Trust [Member] Equity Interest Type [Axis] Equity Interest Type [Axis] Equity Interest Issued or Issuable, Type [Domain] Equity Interest Issued or Issuable, Type [Domain] Common stock Common Stock [Member] Partnership units Partnership Interest [Member] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Wholly Owned Properties Wholly Owned Properties [Member] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Office Building Office Building [Member] Multifamily Multifamily [Member] Other Property Other Property [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Asset under Construction Asset under Construction [Member] Near-Term Development Near-Term Development [Member] Near-Term Development [Member] Future Development Future Development [Member] Future Development [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets Other Assets [Member] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Percentage of common shares distributed Percentage Of Outstanding Common Shares Distributed Percentage Of Outstanding Common Shares Distributed Spinoff ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Limited Partners spinoff ratio Limited Partners Capital Account, Units Split, Conversion Ratio Limited Partners Capital Account, Units Split, Conversion Ratio Common stock issued (in shares) Common Stock, Shares, Issued Common limited partnership units (in shares) Limited Partners' Capital Account, Units Issued Equity interest issued for acquisition (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Common shares outstanding (in shares) Common Stock, Shares, Outstanding Common limited partnership units outstanding (in shares) Limited Partners' Capital Account, Units Outstanding Number of real estate properties Number of Real Estate Properties Area of real estate property (in square feet) Area of Real Estate Property Number of building units Number of Units in Real Estate Property Number of reportable segments Number of Reportable Segments Prior period reclassification adjustment Prior Period Reclassification Adjustment Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] U.S. federal government contracts concentration risk Government Contracts Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Office segment revenue Sales Revenue, Segment [Member] Total revenue Sales Revenue, Net [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] U.S. federal government U.S Federal Government [Member] U.S Federal Government [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenues Revenues Percentage of revenue Concentration Risk, Percentage Composition of investments Equity Method Investments [Table Text Block] Other Liabilities Disclosure [Abstract] Other Liabilities, Net Other Liabilities Disclosure [Text Block] Balance sheet information: Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract] Total assets Equity Method Investment, Summarized Financial Information, Assets Total liabilities Equity Method Investment, Summarized Financial Information, Liabilities Noncontrolling interests Equity Method Investment, Summarized Financial Information, Noncontrolling Interest Total equity Equity Method Investment, Summarized Financial Information, Equity Excluding Noncontrolling Interests Income statement information: Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) [Abstract] Total revenue Equity Method Investment, Summarized Financial Information, Revenue Net income Equity Method Investment, Summarized Financial Information, Net Income (Loss) OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income attributable to JBG SMITH Properties 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] Depreciation and amortization, including amortization of debt issuance costs Depreciation, Depletion and Amortization Straight-line rent Straight Line Rent Equity in (income) loss of unconsolidated real estate ventures Income (Loss) from Equity Method Investments Accretion of below-market lease intangibles, net Amortization Of Acquired Below-Market Lease, Net Of Acquired Above-Market Lease Amortization Of Acquired Below-Market Lease, Net Of Acquired Above-Market Lease Operating distributions from unconsolidated real estate ventures Proceeds from Equity Method Investment, Distribution Other non-cash adjustments Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Tenant and other receivables Increase (Decrease) in Accounts and Notes Receivable Other assets, net Increase (Decrease) in Other Operating Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Other liabilities, net Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Development costs, construction in progress and real estate additions Payments to Acquire and Develop Real Estate Restricted cash Increase (Decrease) in Restricted Cash Other investments Payments to Acquire Other Investments Investments in unconsolidated real estate ventures Payments to Acquire Real Estate and Real Estate Joint Ventures Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Contributions from Vornado Realty Trust, net Proceeds from Contributions from Affiliates Proceeds from borrowings from Vornado Realty Trust Proceeds from Related Party Debt Repayments of borrowings Repayments of Long-term Debt Distributions to noncontrolling interests Payments to Noncontrolling Interests Debt issuance costs Payments of Debt Issuance Costs Proceeds from borrowings Proceeds from Issuance of Long-term Debt Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of the period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of the period SUPPLEMENTAL DISCLOSURE OF CASH FLOW AND NON-CASH INFORMATION: Supplemental Cash Flow Information [Abstract] Transfer of mortgage payable to Vornado Realty Trust Transfer Mortgage Payable Cash paid for interest (net of capitalized interest of $917 and $2,761 in 2017 and 2016, respectively) Interest Paid, Net Accrued capital expenditures included in accounts payable and accrued expenses Capital Expenditures Incurred but Not yet Paid Write-off of fully depreciated assets Write-Off Of Fully Depreciated Assets, Including Asset Impairment Write-Off Of Fully Depreciated Assets, Including Asset Impairment Cash payments for income taxes Income Taxes Paid Organization and Basis of Presentation and Combination Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Summary schedule of mortgages payable Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] The Warner Warner Building [Member] Warner Building [Member] Other investments Other Investment [Member] Other Investment [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Ownership Interest Equity Method Investment, Ownership Percentage Investment Balance Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Segment information Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Commitments and Contingencies Disclosure [Abstract] Additional capital funding committed amount Other Commitment Non-cancelable operating leases future payments Operating Leases, Future Minimum Payments Due Net carrying amount of investment Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Real estate, at cost: Real Estate Investment Property, at Cost [Abstract] Land and improvements Land and Land Improvements Buildings and improvements Investment Building and Building Improvements Construction in progress Development in Process Real Estate Investment Property, at Cost Real Estate Investment Property, at Cost Less accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Real estate, net Real Estate Investment Property, Net Cash and cash equivalents Restricted cash Restricted Cash Tenant and other receivables, net Accounts and Notes Receivable, Net Deferred rent receivable, net Deferred Rent Receivables, Net Investments in unconsolidated real estate ventures Receivable from Vornado Realty Trust Due from Related Parties Other assets, net Other Assets TOTAL ASSETS Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Mortgages payable, net Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Other liabilities, net Other Liabilities Total liabilities Liabilities Commitments and Contingencies Commitments and Contingencies Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Parent equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity TOTAL LIABILITIES AND EQUITY Liabilities and Equity Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Separation and Combination transaction Separation And Combination Transaction [Member] Separation And Combination Transaction [Member] Mortgages payable liabilities assumed in acquisition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Number of real estate properties Number of building units Area of real estate property acquired (in square feet) Number of unrelated owners Number Of Unrelated Owners Number Of Unrelated Owners Number of owners turned employees Number Of Former Owners Turned Employees Number Of Former Owners Turned Employees Number of owners turned board of trustee members Number Of Former Owners Turned Board Members Number Of Former Owners Turned Board Members Transaction services, initial period Related Party Transaction, Initial Potential Service Period Related Party Transaction, Initial Potential Service Period The Warner 1101 17th Street 1101 17th Street [Member] 1101 17th Street [Member] Interest Rate Equity Method Investment, Long Term Debt Interest Rate Equity Method Investment, Long Term Debt Interest Rate Unconsolidated real estate ventures - mortgages payable Equity Method Investment, Long Term Debt Equity Method Investment, Long Term Debt Unamortized deferred financing costs, net Equity Method Investment, Unamortized Deferred Financing Costs Equity Method Investment, Unamortized Deferred Financing Costs Unconsolidated real estate ventures - mortgages payable, net Equity Method Investment, Long Term Debt, Net Equity Method Investment, Long Term Debt, Net Participating Mortgage Loans [Table] Participating Mortgage Loans [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Mortgage Loan, Due June 2022 Mortgage Loan, Due June 2022 [Member] Mortgage Loan, Due June 2022 Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] The Bartlett The Bartlett [Member] The Bartlett [Member] Participating Mortgage Loans [Line Items] Participating Mortgage Loans [Line Items] Debt instrument, face amount Debt Instrument, Face Amount Mortgage loan interest rate Proceeds from issuance of debt Proceeds from Issuance of Debt Proceeds from lines of credit Proceeds from Lines of Credit Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Office Office Segment [Member] Office Segment [Member] Multifamily Multifamily segment [Member] Multifamily segment [Member] Other Other Segments [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total revenue Operating expenses Operating Expenses, Excluding Transaction And Other Costs Operating Expenses, Excluding Transaction And Other Costs Transaction and other costs Other Cost and Expense, Operating Total operating expenses Operating Expenses OPERATING INCOME Operating Income (Loss) Income from unconsolidated real estate ventures Interest and other income, net Investment Income, Net Interest expense Interest Expense INCOME BEFORE INCOME TAX EXPENSE Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) NET INCOME ATTRIBUTABLE TO JBG SMITH PROPERTIES Real estate, at cost Investments in unconsolidated real estate ventures Total assets Subsequent Events Subsequent Events [Text Block] Summary of other assets, net Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Composition of other liabilities, net Other Liabilities [Table Text Block] Mortgages Payable Mortgage Notes Payable Disclosure [Text Block] Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Allocations of centralized corporate costs Allocations Of Centralized Corporate Costs [Member] Allocations Of Centralized Corporate Costs [Member] Financing transactions Financing Transactions [Member] Financing Transactions [Member] Supervise cleaning, engineering and security services Supervisory Services of Properties [Member] Supervisory Services of Properties Consulting agreement Consulting Agreement [Member] Consulting Agreement [Member] BMS BMS [Member] BMS [Member] Financing of the Universal Buildings Financing Of The Universal Buildings [Member] Financing Of The Universal Buildings [Member] Note agreement for development of Bartlett Note Agreement For Development Of Bartlett [Member] Note Agreement For Development Of Bartlett [Member] Mortgage loan secured by Bowen Building Mortgage loan secured by Bowen Building [Member] Mortgage loan secured by Bowen Building [Member] Vornado's revolving credit facility LIBOR Universal Buildings, Washington DC Universal Buildings, Washington DC [Member] Universal Buildings, Washington DC [Member] Bowen Building, Washington DC Bowen Building, Washington DC [Member] Bowen Building, Washington DC [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Related party transaction amount Related Party Transaction, Amounts of Transaction Loan to Vornado Origination of Notes Receivable from Related Parties Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Repayment of loan receivable by Vornado Repayment of Notes Receivable from Related Parties Interest Income on loan receivable from Vornado Interest Income, Related Party Amount outstanding on note agreements with Vornado Notes Payable, Related Parties Interest expense to Vornado Interest Expense, Related Party Repayment of mortgage Loan Repayments of Secured Debt Accrued interest on mortgage loan Debt Instrument, Increase, Accrued Interest Proceeds from Vornado's revolving credit facility Related party transaction, monthly amount Related Party Transaction, Monthly Transaction Amount Related Party Transaction, Monthly Transaction Amount Prepaid rent Advance Rent Lease assumptions liabilities and accrued tenant incentives Lease Assumptions Liabilities And Accrued Tenant Incentives Lease Assumptions Liabilities And Accrued Tenant Incentives Lease intangible liabilities, net Below Market Lease, Net Security deposits Security Deposit Liability Ground lease deferred rent payable Deferred Rent Credit Other Other Sundry Liabilities Total other liabilities, net Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Mortgages payable Debt Instrument, Fair Value Disclosure Schedule of U.S Governmental Revenue Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Income Statement [Abstract] REVENUE Revenues [Abstract] Property rentals Operating Leases, Income Statement, Lease Revenue Tenant reimbursements Tenant Reimbursements Third-party real estate services Management Fees Revenue Other income Other Income Total revenue EXPENSES Costs and Expenses [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Property operating Cost of Other Property Operating Expense Real estate taxes Real Estate Tax Expense General and administrative General and Administrative Expense Income (loss) from unconsolidated real estate ventures Interest and other income, net Interest expense Income tax expense Related Party Transactions Related Party Transactions Disclosure [Text Block] Schedule of financial instruments and liabilities as reflected on balance sheet Fair Value, by Balance Sheet Grouping [Table Text Block] Deferred leasing costs, gross Deferred Costs, Leasing, Gross Accumulated amortization Deferred Costs, Leasing, Accumulated Amortization Deferred leasing costs, net Deferred Costs, Leasing, Net Prepaid expenses Prepaid Expense Identified intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other Other Assets, Miscellaneous Total other assets, net Document And Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding