Condensed Financial Information Disclosure [Abstract] Schedule of Condensed Financial Statements Condensed Financial Statements [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Legal Entities Reportable Legal Entities [Member] Consolidating Adjustments Consolidation, Eliminations [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Columbia Property Trust (Parent) (Guarantor) Parent Company [Member] Columbia Property Trust OP (the Issuer) Subsidiary Issuer [Member] Non- Guarantors Non-Guarantor Subsidiaries [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Assets: Assets [Abstract] Land Land Buildings and improvements, net Investment Building And Building Improvements , Net Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements net of accumulated depreciation Intangible lease assets, net Finite-Lived Intangible Assets, Net Construction in progress Construction in Progress, Gross Real estate assets held for sale, net Real Estate Held-for-sale Total real estate assets Real Estate Investment Property, Net Operating lease assets Operating Lease, Right-of-Use Asset Investments in unconsolidated joint ventures Real Estate Investments, Joint Ventures Cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Investment in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Tenant receivables Accounts and Notes Receivable, Net Straight-line rent receivable Deferred Rent Receivables, Net Prepaid expenses and other assets Prepaid Expense and Other Assets Intangible lease origination costs, net Finite-Lived Intangible Asset, Acquired-in-Place Leases Deferred lease costs, net Deferred Costs, Leasing, Net Other assets held for sale Disposal Group, Including Discontinued Operation, Assets Total assets Assets Liabilities: Liabilities [Abstract] Lines of credit and notes payable, net Loans Payable Bonds payable, net Unsecured Debt Operating lease liabilities Operating Lease, Liability Accounts payable, accrued expenses, and accrued capital expenditures Accounts Payable and Accrued Liabilities Dividends payable Dividends Payable Due to affiliates Due to Related Parties Deferred income Contract with Customer, Liability Intangible lease liabilities, net Off-market Lease, Unfavorable Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities Total liabilities Liabilities Equity: Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract] Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Real Estate [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Construction loan Construction Loan Payable [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Corporate Joint Venture Corporate Joint Venture [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Pike Nurseries Pike Nurseries [Member] Pike Nurseries [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Normandy Normandy [Member] Normandy [Member] 799 Broadway Joint Venture Seven Ninety-Nine Broadway Joint Venture [Member] Seven Ninety-Nine Broadway Joint Venture Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Office Building Office Building [Member] Ancillary retail and office building Ancillary Retail And Office Building [Member] Ancillary Retail And Office Building [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Lindbergh Center - Retail Lindbergh Center [Member] Lindbergh Center [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Square feet of real estate Area of Real Estate Property Payments to acquire interest in joint venture Payments to Acquire Interest in Joint Venture Ownership percentage Equity Method Investment, Ownership Percentage Contribution of property to joint venture Contribution of Property Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Amount borrowed under construction loan Proceeds from Construction Loans Payable Purchase price Payments to Acquire Real Estate Concentration risk, percentage Concentration Risk, Percentage Number of tenants Number of Tenants Number of Tenants Statement of Financial Position [Abstract] Real estate assets, at cost: Real Estate Investment Property, at Cost [Abstract] Buildings and improvements, less accumulated depreciation of $375,981 and $403,355, as of March 31, 2019 and December 31, 2018, respectively Intangible lease assets, less accumulated amortization of $74,807 and $84,881, as of March 31, 2019 and December 31, 2018, respectively Construction in progress Real estate assets held for sale, less accumulated depreciation and amortization of $56,948 as of March 31, 2019 Tenant receivables, net of $4 allowance for doubtful accounts as of December 31, 2018 Intangible lease origination costs, less accumulated amortization of $60,186 and $65,348, as of March 31, 2019 and December 31, 2018, respectively Deferred lease costs, less accumulated amortization of $22,325 and $27,735, as of March 31, 2019 and December 31, 2018, respectively Other assets held for sale, less accumulated amortization of $13,593 as of March 31, 2019 Line of credit and notes payable, net of unamortized deferred financing costs of $2,544 and $2,692, as of March 31, 2019 and December 31, 2018, respectively Bonds payable, net of discounts of $1,259 and $1,304 and unamortized deferred financing costs of $4,005 and $4,158, as of March 31, 2019 and December 31, 2018, respectively Intangible lease liabilities, less accumulated amortization of $22,812 and $21,766, as of March 31, 2019 and December 31, 2018, respectively Liabilities held for sale, less accumulated amortization of $380 as of March 31, 2019 Commitments and Contingencies (Note 7) Commitments and Contingencies Common stock, $0.01 par value, 225,000,000 shares authorized, 116,879,665 and 116,698,033 shares issued and outstanding, as of March 31, 2019 and December 31, 2018, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Cumulative distributions in excess of earnings Accumulated Distributions in Excess of Net Income Cumulative other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total equity Financial Information for Parent Guarantor, Issuer Subsidiary, and Non-Guarantor Subsidiaries Financial Information For Parent Issuer Guarantor Subsidiaries And Nonguarantor Subsidiaries [Text Block] Financial information for parent, issuer, guarantor subsidiaries, and nonguarantor subsidiaries. [Text Block] Earnings Per Share [Abstract] Schedule of Basic and Diluted Earnings Per Share Computations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Leases [Abstract] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Ground Leases Land [Member] Office Lease Building [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Cash paid for operating lease liabilities in cash flows from operations Operating Lease, Payments Schedule of Future Minimum Lease Payments To Be Made Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Future Minimum Lease Payments to be Made and Received Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Summary of Impact of Operating Leases on Consolidated Balance Sheet Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Summary of Impact of Operating Leases on Statements of Operations and Statements of Cash Flows Lease, Cost [Table Text Block] Summary of Fixed and Variable Revenues Operating Lease, Lease Income [Table Text Block] Schedule of Future Minimum Lease Payments To Be Received Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Accounting Policies [Abstract] Schedule of Estimated Useful Lives for Real Estate Assets Schedule of Estimated Useful Lives for Real Estate Assets [Table Text Block] Schedule of Estimated Useful Lives for Real Estate Assets [Table Text Block] Schedule of Major Classes of Assets and Liabilities Classified as Held For Sale Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of Intangible Assets and Liabilities Schedule of Intangible Assets and Liabilities [Table Text Block] Schedule of Intangible Assets and Liabilities [Table Text Block] Schedule of Interest Rate Swaps Schedule of Interest Rate Derivatives [Table Text Block] Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Net income Net Income (Loss) Attributable to Parent Market value adjustments to interest rate swap Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Revenue from Contract with Customer [Abstract] Non-Lease Revenues Revenue from Contract with Customer [Text Block] Operating Leases, Future Minimum Payments Due Operating Lease Liabilities, Payments Due [Abstract] Remainder of 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five 2024 Lessee, Operating Lease, Liability, Payments, Due Year Six Lessee, Operating Lease, Liability, Payments, Due Year Six Thereafter Lessee, Operating Lease, Liability, Payments, Due After Year Six Lessee, Operating Lease, Liability, Payments, Due After Year Six Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less: interest expense Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Weighted-average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Operating Leases, Future Minimum Payments Due Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Real Estate Transactions Real Estate Disclosure [Text Block] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Rental income and tenant reimbursements Rental Income And Tenant Reimbursements [Member] Rental Income And Tenant Reimbursements [Member] Property operating costs Maintenance [Member] Asset and property management income/fees Management Service [Member] Other property income Real Estate, Other [Member] Revenues: Revenues [Abstract] Revenues Operating Lease, Lease Income Revenues Operating Leases, Income Statement, Lease Revenue Revenues Revenue from Contract with Customer, Excluding Assessed Tax Revenues Revenues Expenses: Operating Expenses [Abstract] Cost of goods and services sold Cost of Goods and Services Sold Depreciation Depreciation Amortization Amortization General and administrative – corporate General and Administrative Expense, Corporate General and Administrative Expense, Corporate General and administrative – unconsolidated joint ventures General and Administrative Expense, Unconsolidated Joint Venture General and Administrative Expense, Unconsolidated Joint Venture Costs and expenses Operating Expenses Other Income (Expense): Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest and other income Interest and Other Income Gain on sale of unconsolidated joint venture interests Equity Method Investment, Realized Gain (Loss) on Disposal Income tax expense Income Tax Expense (Benefit) Gain on sale of real estate assets Income (Loss) from Equity Method Investments, Joint Ventures Income (Loss) from Equity Method Investments, Joint Ventures Nonoperating income (expense) Nonoperating Income (Expense) Net income Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Base Rate Base Rate [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Credit Facilities Line of Credit [Member] Term Loans Notes Payable to Banks [Member] Loans Payable Loans Payable [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Revolving Credit Facility JPMorgan Chase Credit Facility [Member] JPMorgan Chase Credit Facility [Member] $300 Million Term Loan $300 Million Term Loan, Maturity July 2020 [Member] $300 Million Term Loan, Maturity July 2020 [Member] $150 Million Term Loan $150 Million Term Loan, Maturity July 2022 [Member] $150 Million Term Loan, Maturity July 2022 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Face amount of issued debt instrument Debt Instrument, Face Amount Number of possible extensions Line of Credit Facility, Number of Possible Extensions Line of Credit Facility, Number of Possible Extensions Term of extension Line of Credit Facility, Term of Extension Line of Credit Facility, Term of Extension Basis spread Debt Instrument, Basis Spread on Variable Rate Estimated fair value of line of credit and notes payable Debt Instrument, Fair Value Disclosure Carrying value of the line of credit and notes payable Loans Payable Excluding Deferred Financing Costs Loans Payable Excluding Deferred Financing Costs Interest payments Interest Paid, Including Capitalized Interest, Operating and Investing Activities Interest capitalized Interest Costs Capitalized Capitalized interest costs Capitalized Interest Costs, Including Allowance for Funds Used During Construction Weighted average interest rate Debt, Weighted Average Interest Rate Income Statement [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Interest expense Per-Share Information – Basic: Earnings Per Share, Basic [Abstract] Net income (dollars per share) Earnings Per Share, Basic Weighted-average common shares outstanding – basic Weighted Average Number of Shares Outstanding, Basic Per-Share Information – Diluted: Earnings Per Share, Diluted [Abstract] Net income (dollars per share) Earnings Per Share, Diluted Weighted-average common shares outstanding – diluted Weighted Average Number of Shares Outstanding, Diluted Remainder of 2019 Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year 2020 Lessor, Operating Lease, Payments to be Received, Two Years 2021 Lessor, Operating Lease, Payments to be Received, Three Years 2022 Lessor, Operating Lease, Payments to be Received, Four Years 2023 Lessor, Operating Lease, Payments to be Received, Five Years 2024 Lessor, Operating Lease, Payments to be Received, Six Years Lessor, Operating Lease, Payments to be Received, Six Years Thereafter Lessor, Operating Lease, Payments to be Received, After Year Six Lessor, Operating Lease, Payments to be Received, After Year Six Total Lessor, Operating Lease, Payments to be Received 2019 Operating Leases, Future Minimum Payments Receivable, Current 2020 Operating Leases, Future Minimum Payments Receivable, in Two Years 2021 Operating Leases, Future Minimum Payments Receivable, in Three Years 2022 Operating Leases, Future Minimum Payments Receivable, in Four Years 2023 Operating Leases, Future Minimum Payments Receivable, in Five Years Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Total Operating Leases, Future Minimum Payments Receivable Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] 222 East 41st Street Two Twenty-Two East 41st Street [Member] Two Twenty-Two East 41st Street [Member] 263 Shuman Boulevard Two Sixty-Three Shuman Boulevard [Member] Two Sixty-Three Shuman Boulevard [Member] University Circle & 333 Market Street Three Thirty-Three Market Street Joint Venture and University Circle Joint Venture [Member] Three Thirty-Three Market Street Joint Venture and University Circle Joint Venture [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposed of by Sale Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] 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] % Sold Equity Method Investment, Ownership Percentage Sold During Period Equity Method Investment, Ownership Percentage Sold During Period Sales Price Disposal Group, Including Discontinued Operation, Consideration Gain on Sale Gains (Losses) on Sales of Investment Real Estate Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Property operating costs Property Operating Costs [Member] Property Operating Costs [Member] General and administrative – corporate General And Administrative Expense, Corporate [Member] General And Administrative Expense, Corporate [Member] Operating lease expenses Operating Lease, Cost Document and Entity Information [Abstract] Document and Entity Information [Abstract] 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 Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Less: Deferred financing costs related to term loans and notes payable, net of accumulated amortization Debt Issuance Costs, Net Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Real Estate Properties [Table] Schedule of Real Estate Properties [Table] 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] Unconsolidated Properties Unconsolidated Properties [Member] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Number of real estate properties Number of Real Estate Properties Number of properties under development Number Of Real Estate Properties Under Development Number Of Real Estate Properties Under Development Percent of leased office space of owned properties Leased Office Space of Owned Properties, Percent Leased Office Space of Owned Properties, Percent Equity Method Investments and Joint Ventures [Abstract] Summary of Financial Information for the Joint Ventures Equity Method Investments [Table Text Block] 799 Broadway Ownership Interest Purchase Price Purchase Price Bonds Payable Bond Disclosure [Text Block] The entire disclosure for information about bonds, including repayment terms, interest rates, collateral provided, whether or not in compliance with covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with covenants. [Text Block] Fixed payments Operating Lease, Fixed Lease Income Operating Lease, Fixed Lease Income Variable payments Operating Lease, Variable Lease Income Total rental income and tenant reimbursements Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Net proceeds from sale of investments in unconsolidated joint ventures Proceeds from Divestiture of Interest in Joint Venture Investment in real estate and related assets Payments to Acquire and Develop Real Estate and Lease Acquisition Costs Payments to Acquire and Develop Real Estate and Lease Acquisition Costs Investments in unconsolidated joint ventures Distributions from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution, Return of Capital Distributions from subsidiaries Proceeds from Divestiture of Businesses and Interests in Affiliates Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings, net of fees Proceeds from Notes Payable, Net of Financing Costs Proceeds from Notes Payable, Net of Financing Costs Repayments Repayments of Long-term Debt Distributions Distributions Paid to Stockholders for Dividends and Reinvested Shares of Common Stock Distributions Paid to Stockholders for Dividends and Reinvested Shares of Common Stock Repurchases of common stock Payments for Repurchase of Common Stock Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] 114 Fifth Avenue Joint Venture One Fourteen Fifth Avenue Joint Venture [Member] One Fourteen Fifth Avenue Joint Venture [Member] 333 Market Street and University Circle Market Square Joint Venture Market Square Joint Venture [Member] Market Square Joint Venture [Member] 1800 M Street Joint Venture Eighteen Hundred M Street [Member] Eighteen Hundred M Street [Member] Operating Segments Operating Segments [Member] Hotel Segment Reconciling Items [Member] Corporate Corporate, Non-Segment [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] New York New York Segment [Member] New York Segment San Francisco San Francisco Segment [Member] San Francisco Segment Atlanta Atlanta Segment [Member] Atlanta Segment Washington, D.C. Washington, D.C. Segment [Member] Washington, D.C. Segment Boston Boston Segment [Member] Boston Segment Los Angeles Los Angeles Segment [Member] Los Angeles Segment All other office markets All Other Markets Segment [Member] All Other Markets Segment Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net operating income (loss) including unconsolidated joint venture Net Operating Income (Loss) Including Unconsolidated Joint Venture Net Operating Income (Loss) Including Unconsolidated Joint Venture Statement of Comprehensive Income [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] University Circle Joint Venture University Circle Joint Venture [Member] University Circle Joint Venture [Member] 333 Market Street Joint Venture Three Thirty-Three Market Street Joint Venture [Member] Three Thirty-Three Market Street Joint Venture [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Carrying Value of Investment Equity Method Investments Asset and property management fee income Property Management Fee Revenue Leasing override fee income Lease Override Fee Revenue Lease Override Fee Revenue Salary and other reimbursement revenue Salary And Other Reimbursement Revenue Salary And Other Reimbursement Revenue Miscellaneous revenue Miscellaneous Revenue Miscellaneous Revenue One & Three Glenlake One & Three Glenlake [Member] One & Three Glenlake [Member] Held for sale Disposal Group, Held-for-sale, Not Discontinued Operations [Member] Real Estate Assets Held for Sale: Disposal Group, Including Discontinued Operation, Assets [Abstract] Real Estate Assets, at Cost: Disposal Group, Including Discontinued Operation, Real Estate Assets [Abstract] Disposal Group, Including Discontinued Operation, Real Estate Assets [Abstract] Land Disposal Group, Including Discontinued Operation, Land Disposal Group, Including Discontinued Operation, Land Buildings and improvements, less accumulated depreciation of $46,118 Disposal Group, Including Discontinued Operation, Buildings and Improvements Disposal Group, Including Discontinued Operation, Buildings and Improvements Intangible lease assets, less accumulated amortization of $10,830 Disposal Group, Including Discontinued Operation, Intangible Lease Assets Disposal Group, Including Discontinued Operation, Intangible Lease Assets Construction in progress Disposal Group, Including Discontinued Operation, Construction in Progress Disposal Group, Including Discontinued Operation, Construction in Progress Total real estate assets held for sale, net Disposal Group, Including Discontinued Operation, Real Estate Assets Disposal Group, Including Discontinued Operation, Real Estate Assets Other Assets Held for Sale: Disposal Group, Including Discontinued Operation, Other Assets Held For Sale [Abstract] Disposal Group, Including Discontinued Operation, Other Assets Held For Sale [Abstract] Tenant receivables Disposal Group, Including Discontinued Operation, Tenant Receivables Disposal Group, Including Discontinued Operation, Tenant Receivables Straight-line rent receivable Disposal Group, Including Discontinued Operation, Rent Receivable Disposal Group, Including Discontinued Operation, Rent Receivable Prepaid expenses and other assets Disposal Group, Including Discontinued Operation, Prepaid and Other Assets Intangible lease origination costs, less accumulated amortization of $7,109 Disposal Group, Including Discontinued Operation, Intangible Lease Origination Costs Disposal Group, Including Discontinued Operation, Intangible Lease Origination Costs Deferred lease costs, less accumulated amortization of $6,484 Disposal Group, Including Discontinued Operation, Deferred Lease Costs Disposal Group, Including Discontinued Operation, Deferred Lease Costs Total other assets held for sale, net Disposal Group, Including Discontinued Operation, Other Assets Liabilities Held for Sale: Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Accounts payable, accrued expenses, and accrued capital expenditures Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities Deferred income Disposal Group, Including Discontinued Operation, Deferred Revenue Intangible lease liabilities, less accumulated amortization of $380 Disposal Group, Including Discontinued Operation, Intangible Lease Liability Disposal Group, Including Discontinued Operation, Intangible Lease Liability Total liabilities held for sale, net Building and improvements held for sale, accumulated depreciation Disposal Group, Including Discontinued Operation, Buildings and Improvements, Accumulated Depreciation Disposal Group, Including Discontinued Operation, Buildings and Improvements, Accumulated Depreciation Intangible lease assets held for sale, accumulated amortization Disposal Group, Including Discontinued Operation, Intangible Lease Assets, Accumulated Amortization Disposal Group, Including Discontinued Operation, Intangible Lease Assets, Accumulated Amortization Intangible lease origination costs held for sale, accumulated amortization Disposal Group, Including Discontinued Operation, Intangible Lease Origination Costs, Accumulated Amortization Disposal Group, Including Discontinued Operation, Intangible Lease Origination Costs, Accumulated Amortization Deferred lease costs held for sale, accumulated amortization Disposal Group, Including Discontinued Operation, Deferred Lease Costs, Accumulated Amortization Disposal Group, Including Discontinued Operation, Deferred Lease Costs, Accumulated Amortization Intangible lease liabilities, accumulated amortization Disposal Group, Including Discontinued Operation, Intangible Lease Liabilities, Accumulated Amortization Disposal Group, Including Discontinued Operation, Intangible Lease Liabilities, Accumulated Amortization Operating lease, number of ground leases Lessee, Operating Lease, Number Of Contracts Lessee, Operating Lease, Number Of Contracts Lessee, operating lease, right-of-use asset, term of contract Lessee, Operating Lease, Right-of-Use Asset, Remaining Term Of Contract Lessee, Operating Lease, Right-of-Use Asset, Remaining Term Of Contract Lessee, operating lease, liability, term of contract Lessee, Operating Lease, Liability, Remaining Term Of Contract Lessee, Operating Lease, Liability, Remaining Term Of Contract Lessor, operating lease, weighted-average remaining lease term Lessor, Operating Lease, Weighted Average Remaining Lease Term Lessor, Operating Lease, Weighted Average Remaining Lease Term Schedule of Finite-Lived Intangible Assets by Major Class Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Above-Market In-Place Lease Assets Above-Market In-Place Lease Assets [Member] Above-Market In-Place Lease Assets [Member] Absorption Period Costs Absorption Period Costs [Member] Absorption Period Costs [Member] Intangible Lease Origination Costs Intangible Lease Origination Costs [Member] Intangible Lease Origination Costs [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Amortization of Intangible Lease Assets Intangible Below-Market In-Place Lease Liabilities Amortization of Below Market Lease Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Segment Reconciling Items Amortization Adjustment For Amortization Continuing Operations The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives for continuing operations Net interest expense Interest Income (Expense), Net Interest income from development authority bonds Interest Income, Development Authority Bonds Interest Income, Development Authority Bonds Gain on sale of unconsolidated joint venture interests Income tax expense Asset and property management fee income Adjustments included in income from unconsolidated joint ventures Income (Loss) from Equity Method Investments, Adjustment Income (Loss) from Equity Method Investments, Adjustment NOI Net Operating Income (Loss) Net Operating Income (Loss) Equity [Abstract] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Line of Credit and Notes Payable Debt Disclosure [Text Block] Ownership percentage of wholly owned subsidiary Ownership Percentage, Wholly Owned Subsidiary Ownership Percentage, Wholly Owned Subsidiary Supplemental Cash Flow Elements [Abstract] Significant Noncash Investing and Financing Activities Schedule of Other Significant Noncash Transactions [Table Text Block] Statement of Cash Flows [Abstract] Cash Flows From Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 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] Straight-line rental income Straight Line Rent Noncash operating lease expense Noncash Operating Lease, Expense Noncash Operating Lease, Expense Amortization Amortization of Intangible Assets Stock-based compensation expense Share-based Compensation Noncash interest expense Noncash interest expense The component of interest expense representing interest paid other than in cash for example by increasing the balance of debt securities and the noncash expenses charged against earnings in the period to amortize debt discount and premium associated with the related debt instruments. Income from unconsolidated joint ventures Distributions of earnings from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution Changes in assets and liabilities, net of acquisitions and dispositions: Changes in assets and liabilities, net of acquisitions [Abstract] Changes in assets and liabilities, net of acquisitions [Abstract] Increase in tenant receivables, net Increase (Decrease) in Accounts Receivable Decrease in prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Decrease in accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (decrease) in deferred income Increase (Decrease) in Contract with Customer, Liability Net cash provided by operating activities Cash Flows From Investing Activities: Prepaid transaction costs and earnest money Payments for Deposits on Real Estate Acquisitions Capital improvement and development costs Payments to Acquire and Develop Real Estate Deferred lease costs paid Increase (Decrease) in Lease Acquisition Costs Cash Flows From Financing Activities: Financing costs paid Payments of Financing Costs Proceeds from lines of credit and notes payable Proceeds from Notes Payable Repayments of lines of credit and notes payable Repayments of Notes Payable Distributions paid to stockholders Payments of Dividends Redemptions of common stock Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Reconciliation of Revenue from Segments to Consolidated Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Previously granted awards, unvested Long Term Incentive Plan [Member] Long Term Incentive Plan [Member] Future period LTI Plan awards 2015 Long Term Incentive Plan [Member] 2015 Long Term Incentive Plan [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Distributions paid on unvested shares Preferred Stock Dividends and Other Adjustments Net income used to calculate basic and diluted earnings per share Net Income (Loss) Available to Common Stockholders, Basic Weighted-average common shares – basic Plus incremental weighted-average shares from time-vested conversions, less assumed stock repurchases Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted-average common shares – diluted For the remainder of 2019 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year For the Years Ending December 31: Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Six Finite-Lived Intangible Assets, Amortization Expense, Year Six Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Six Finite-Lived Intangible Assets, Amortization Expense, after Year Six Intangible lease assets, net Intangible Lease Origination Costs, Net Intangible Below-Market In-Place Lease Liabilities Below Market Lease [Abstract] For the remainder of 2019 Below Market Lease, Amortization Income, Remainder of Fiscal Year For the years ending December 31: Below Market Lease, Net, Amortization Income, Fiscal Year Maturity [Abstract] 2020 Below Market Lease, Amortization Income, Year Two 2021 Below Market Lease, Amortization Income, Year Three 2022 Below Market Lease, Amortization Income, Year Four 2023 Below Market Lease, Amortization Income, Year Five 2024 Below Market Lease, Amortization Income, Year Six Below Market Lease, Amortization Income, Year Six Thereafter Below Market Lease, Amortization Income, after Year Six Below Market Lease, Amortization Income, after Year Six Below Market Lease, Net Below Market Lease, Net Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Employees Employees [Member] Employees [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Future employee awards Deferred Compensation Arrangement with Individual, Compensation Expense Operating lease assets Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Bridge Loan Bridge Loan [Member] Mortgage Notes Mortgages [Member] $300 Million Bridge Loan Three Hundred Million Dollar Bridge Loan, Maturity November 2018 [Member] Three Hundred Million Dollar Bridge Loan, Maturity November 2018 [Member] 263 Shuman Boulevard building mortgage note Two-Hundred Sixty-Three Shuman Boulevard Mortgage Note [Member] Two-Hundred Sixty-Three Shuman Boulevard Mortgage Note [Member] Consideration transferred Impairment loss on real estate assets Impairment of Real Estate Repayment of debt Repayments of Debt Extinguishment of loan principal Extinguishment of Debt, Amount Gain on extinguishment of debt Gain (Loss) on Extinguishment of Debt Interests sold Eliminations Intersegment Eliminations [Member] Operating revenues including unconsolidated joint venture Revenues, Including Unconsolidated Joint Venture Revenues, Including Unconsolidated Joint Venture Operating revenues Segment Information Segment Reporting Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Distributions to common stockholders per share (dollars per share) Common Stock, Dividends, Per Share, Cash Paid Schedule of Line of Credit and Notes Payable Indebtedness Schedule of Debt [Table Text Block] Basis of Presentation Consolidation, Policy [Policy Text Block] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Real Estate Assets Property, Plant and Equipment, Policy [Policy Text Block] Assets Held for Sale Real Estate Held for Development and Sale, Policy [Policy Text Block] Evaluating the Recoverability of Real Estate Assets Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Intangible Assets and Liabilities Arising From In-Place Leases Where Columbia Property Trust Is the Lessor Lessor, Leases [Policy Text Block] Interest Rate Swap Agreements Derivatives, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Reclassification Reclassification, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Unconsolidated Joint Ventures Equity Method Investments and Joint Ventures Disclosure [Text Block] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2017-05 Accounting Standards Update 2017-05 [Member] ASU 2014-09 Accounting Standards Update 2014-09 [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Cumulative Distributions in Excess of Earnings Accumulated Distributions in Excess of Net Income [Member] Cumulative Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance, shares Common Stock, Shares, Outstanding Beginning balance, value Cumulative-effect adjustment for the adoption of ASU Cumulative Effect of New Accounting Principle in Period of Adoption Repurchases of common stock, shares Stock Repurchased and Retired During Period, Shares Repurchases of common stock Stock Repurchased and Retired During Period, Value Common stock issued to employees and directors, and amortized (net of income tax withholdings), shares Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Common stock issued to employees and directors, and amortized (net of income tax withholdings) Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Distributions to common stockholders ($0.20 in 2019 and 2018) Dividends Ending balance, shares Ending balance, value Revenues Business Acquisition, Pro Forma Revenue Net income Business Acquisition, Pro Forma Net Income (Loss) Bonds Payable Unsecured Debt [Member] Building and improvements, accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Intangible lease assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Real estate assets held for sale, accumulated amortization Real Estate Held-for-sale, Accumulated Amortization Real Estate Held-for-sale, Accumulated Amortization Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Intangible lease origination costs, accumulated amortization Finite Lived Intangible Assets, Acquired in Place leases, Accumulated Amortization The accumulated amount of amortization of finite-lived intangible assets for acquired in-place leases. Deferred lease costs, accumulated amortization Deferred Costs, Leasing, Accumulated Amortization Other assets held for sale, accumulated amortization Disposal Group, Including Discontinued Operation, Other Assets, Accumulated Amortization and Depreciation Disposal Group, Including Discontinued Operation, Other Assets, Accumulated Amortization and Depreciation Deferred financing costs, net Bonds payable discount Debt Instrument, Unamortized Discount Intangible lease liabilities, accumulated amortization Off market lease, unfavorable, Accumulated Amortization The accumulated amount of amortization of off-market leases, unfavorable. Liabilities held for sale, accumulated amortization Disposal Group, Including Discontinued Operation, Liabilities, Accumulated Amortization Disposal Group, Including Discontinued Operation, Liabilities, Accumulated Amortization Common stock, par value (dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Prepaid expenses and other assets Prepaid Expenses and Other Assets [Member] Prepaid Expenses and Other Assets [Member] Property operating costs Other property income Other Income [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Number of joint ventures that qualify as variable interest entities Number Of Joint Ventures That Qualify As Variable Interest Entities Number Of Joint Ventures That Qualify As Variable Interest Entities Reimbursements of property operating costs Property management fee receivable Property Management Fee Receivable Property Management Fee Receivable Cash paid for lease Cash received for lease Proceeds from Lease Payments Schedule of Properties Acquired Schedule of Business Acquisitions, by Acquisition [Table Text Block] Unaudited Pro Forma Financial Results Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Properties Sold Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Building and site improvements Building Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Estimated useful life of real estate assets Property, Plant and Equipment, Useful Life Capitalized interest costs to construction in progress Gross intangible assets Finite-Lived Intangible Assets, Gross Hedge ineffectiveness recognized in earnings Gain (Loss) on Interest Rate Fair Value Hedge Ineffectiveness Requirement to distribute taxable income (at least) Requirement to Distribute Taxable Income, Percent Requirement to Distribute Taxable Income, Percent Limit on investments in taxable real estate investment trusts (percent) Limit on Investments in Taxable Real Estate Investment Trusts, Percent Limit on Investments in Taxable Real Estate Investment Trusts, Percent Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Interest rate contracts Interest Rate Contract [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative, Fair Value, Net [Abstract] Derivative, Fair Value, Net [Abstract] Derivative designated as hedging instruments Derivative Instruments in Hedges, at Fair Value, Net Summary of Derivative Instruments Impact on Results of Operations [Abstract] Summary of Derivative Instruments Impact on Results of Operations [Abstract] Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock [Member] Restricted Stock [Member] RSUs Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares Rollforward Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested awards - beginning of period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unvested awards - end of period (shares) Weighted-Average, Grant-Date Fair Value Rollforward Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Unvested awards - beginning of period (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Unvested awards - end of period (dollars per share) Shares granted Shares expected to ultimately vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest Expected forfeiture rate Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected Forfeiture Rate Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected Forfeiture Rate Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Earnings Per Share Earnings Per Share [Text Block] Condensed Consolidating Balance Sheets Condensed Balance Sheet [Table Text Block] Consolidating Statements of Operations Condensed Income Statement [Table Text Block] Consolidating Statements of Comprehensive Income Comprehensive Income (Loss) [Table Text Block] Consolidating Statements of Cash Flows Condensed Cash Flow Statement [Table Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Amortization of net discounts on debt Amortization of Debt Discount (Premium) Accrued investments in unconsolidated joint ventures Accrued Investments In Unconsolidated Joint Ventures Accrued Investments In Unconsolidated Joint Ventures Accrued capital expenditures and deferred lease costs Other Significant Noncash Transactions, Capital Expenditures Incurred but Not yet Paid and Deferred Leasing Costs, Noncash Other Significant Noncash Transactions, Capital Expenditures Incurred but Not yet Paid and Deferred Leasing Costs, Noncash Operating lease liability recorded at adoption of ASC 842 Lease Obligations Incurred, Operating Lease Lease Obligations Incurred, Operating Lease Market value adjustments to interest rate swaps that qualify for hedge accounting treatment Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Cumulative-effect adjustment to equity for the adoption of ASU 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Non-Financial Assets Amortization of common stock issued to employees and directors Common Stock Issued, Value Common Stock Issued, Value Time-based Stock Awards Time-based Stock Awards [Member] Time-based Stock Awards [Member] Equity Components [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] 2017 Stock Repurchase Program Twenty-Seventeen Stock Repurchase Program [Member] Twenty-Seventeen Stock Repurchase Program [Member] 2013 Long Term Incentive Plan 2013 Long Term Incentive Plan [Member] 2013 Long Term Incentive Plan [Member] Long Term Incentive Plan Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] End of Performance Period Share-based Compensation Award, Tranche One [Member] 1 Year Post Performance Period Share-based Compensation Award, Tranche Two [Member] Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Stock repurchase program, amount available for repurchase Stock Repurchase Program, Remaining Authorized Repurchase Amount Shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Award vesting rights (percent) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Performance period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Unrecognized compensation costs related to unvested awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized compensation costs recognition period (years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Summary of the Activity of Employee Stock Grants Schedule of Nonvested Share Activity [Table Text Block] Schedule of Stock-based Compensation Expense Incurred Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Supplemental Disclosures of Noncash Investing and Financing Activities Cash Flow, Supplemental Disclosures [Text Block] Gross Intangible In-Place Lease Assets and Liabilities [Abstract] Gross Intangible In-Place Lease Assets and Liabilities [Abstract] Gross Intangible In-Place Lease Assets and Liabilities [Abstract] Intangible Lease Assets, Gross Intangible Lease Assets, Accumulated Amortization Intangible Lease Origination Costs, Gross Finite-Lived Intangible Asset, Acquired-in-Place Leases, Gross Finite-Lived Intangible Asset, Acquired-in-Place Leases, Gross Intangible Lease Origination Costs, Accumulated Amortization Below Market Lease, Gross Below Market Lease, Gross Below Market Lease, Accumulated Amortization Below Market Lease, Accumulated Amortization Intangible lease assets Leases, Acquired-in-Place [Member] Intangible lease origination costs Building and improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings and Improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings and Improvements Intangible lease Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Intangible below market lease liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Below-Market Lease Liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Below-Market Lease Liability Total purchase price Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Loss Contingencies [Table] Loss Contingencies [Table] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] 149 Madison Avenue One Forty Nine Madison Avenue [Member] One Forty Nine Madison Avenue [Member] Blackstone Property Partners Blackstone Property Partners [Member] Blackstone Property Partners [Member] Columbia Property Trust and joint venturer Columbia Property Trust And Joint Venturer [Member] Columbia Property Trust And Joint Venturer [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Unrecorded tenant allowance commitments Contractual Obligation Mortgage guaranty Guarantor Obligations, Maximum Exposure, Undiscounted Debt Real Estate Investments, Joint Ventures, Debt Real Estate Investments, Joint Ventures, Debt Guaranty liability Guaranty Liabilities Capital calls unpaid Guarantor Obligations, Capital Calls Payable Guarantor Obligations, Capital Calls Payable Leases Lessee, Operating Leases [Text Block] Leases Lessor, Operating Leases [Text Block] Market Square, University Circle, 333 Market Street, 114 Fifth Avenue, 1800 M Street And 799 Broadway Joint Ventures Market Square, University Circle, 333 Market Street, 114 Fifth Avenue, 1800 M Street And 799 Broadway Joint Ventures [Member] Market Square, University Circle, 333 Market Street, 114 Fifth Avenue, 1800 M Street And 799 Broadway Joint Ventures [Member] Total assets Equity Method Investment, Summarized Financial Information, Assets Total debt Equity Method Investment, Summarized Financial Information, Liabilities Total equity Equity Method Investment Summarized Financial Information, Equity Aggregate basis difference Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Mortgage note interest rate Debt Instrument, Interest Rate, Stated Percentage LIBOR (maximum) Debt Instrument, LIBOR, Maximum Debt Instrument, LIBOR, Maximum Number of extensions available Debt Instrument, Number Of Extensions Debt Instrument, Number Of Extensions Extension term Debt Instrument, Extension Term Debt Instrument, Extension Term 2026 and 2025 Bonds Payable Two-Thousand and Twenty-Six and Two-Thousand and Twenty-Five Bonds Payable [Member] Two-Thousand and Twenty-Six and Two-Thousand and Twenty-Five Bonds Payable [Member] 2026 Bonds Payable Two-Thousand and Twenty-Six Bonds Payable [Member] Two-Thousand and Twenty-Six Bonds Payable [Member] 2025 Bonds Payable Two-Thousand and Twenty-Five Bonds Payable [Member] Two-Thousand and Twenty-Five Bonds Payable Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Number of series of bonds Number Of Series Of Bonds Number Of Series Of Bonds Maturity of debt instrument Debt Instrument, Term Interest rate for debt instrument (percent) Discount rate of face value of issued debt instrument (percent) Debt Instrument, Discount Rate at Issuance of Face Value Debt Instrument, Discount Rate at Issuance of Face Value Estimated fair value of debt instrument Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Total Revenues Equity Method Investment, Summarized Financial Information, Revenue Net Income (Loss) Equity Method Investment, Summarized Financial Information, Net Income (Loss) Columbia Property Trust's Share of Net Income (Loss)