Discontinued Operations and Disposal Groups [Abstract] 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] Cole Capital [Member] Cole Capital [Member] Cole Capital [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Held-for-sale of Disposed of by Sale [Member] Discontinued Operations, Held-for-sale or Disposed of by Sale [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] Offering-related fees and reimbursements Disposal Group, Including Discontinued Operation, Offering Related Fees and Reimbursements Disposal Group, Including Discontinued Operation, Offering Related Fees and Reimbursements Transaction service fees and reimbursements Disposal Group, Including Discontinued Operation, Gross Transaction Service Revenue Disposal Group, Including Discontinued Operation, Gross Transaction Service Revenue Management fees and reimbursements Disposal Group, Including Discontinued Operation, Gross Management Service Revenues Disposal Group, Including Discontinued Operation, Gross Management Service Revenues Total revenues Disposal Group, Including Discontinued Operation, Revenue Cole Capital reallowed fees and commissions Disposal Group, Including Discontinued Operation, Fees and Commissions Disposal Group, Including Discontinued Operation, Fees and Commissions Transaction costs Disposal Group, Including Discontinued Operation, Non-Deductible Transaction Costs Expense (Income) Disposal Group, Including Discontinued Operation, Non-Deductible Transaction Costs Expense (Income) General and administrative Disposal Group, Including Discontinued Operation, General and Administrative Expense Amortization of intangible assets Disposal Group, Including Discontinued Operation, Depreciation and Amortization Total operating expenses Disposal Group, Including Discontinued Operation, Operating Expense Operating income Disposal Group, Including Discontinued Operation, Operating Income (Loss) Other income, net Disposal Group, Including Discontinued Operation, Other Income (Expense), Net Disposal Group, Including Discontinued Operation, Other Income (Expense), Net Gain (loss) on disposition Disposal Group, Including Discontinued Operation, (Gain) Loss Recognized, Classified as Held for Sale Disposal Group, Including Discontinued Operation, (Gain) Loss Recognized, Classified as Held for Sale Income before taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Benefit from (provision for) income taxes Discontinued Operation, Tax Effect of Discontinued Operation Income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Receivables [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Mortgage notes receivable [Member] Mortgage Receivable [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Number of mortgage notes receivable Number of Loans Held for Investment Number of Loans Held for Investment Weighted-average interest rate Loans Receivable, Weighted Average Interest Rate Loans Receivable, Weighted Average Interest Rate Weighted-average years to maturity Loans Receivable, Weighted Average Maturity Period Loans Receivable, Weighted Average Maturity Period Number of mortgage notes with capitalized principal and interest Number of Loans Held for Investment with Capitalized Principal and Interest Number of Loans Held for Investment with Capitalized Principal and Interest Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Accounts Receivable [Member] Accounts Receivable [Member] Rent Receivables [Member] Rent Receivables [Member] Rent Receivables [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit [Member] Line of Credit [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] Leasehold Improvements [Member] Leasehold Improvements [Member] Property and Equipment [Member] Property and Equipment [Member] Property and Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Accounts receivable, net Accounts Receivable, Net Straight-line rent receivable, net Deferred Rent Receivables, Net Deferred costs, net Debt Issuance Costs, Line of Credit Arrangements, Net Prepaid expenses Prepaid Expense Leasehold improvements, property and equipment, net Property, Plant and Equipment, Net Restricted escrow deposits Escrow Deposit Income tax receivable Income Taxes Receivable Investment in Cole REITs Other Investments Other amounts due from Cole REITs Other Receivables Other assets, net Other Assets Total Rent and Tenant Receivable and Other Assets, Net Rent and Tenant Receivable and Other Assets, Net Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Allowance for suspended revenue recognition Allowance for Suspended Revenue Recognition Allowance for Suspended Revenue Recognition Amortization expense Amortization Accumulated amortization for deferred costs Accumulated Amortization, Debt Issuance Costs Accumulated amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Depreciation expense Depreciation Due from affiliates, net Due from Affiliates Interest receivable reserves Interest Receivable, Reserve Interest Receivable, Reserve Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Cole Real Estate Investments, Inc. [Member] Cole Real Estate Investments, Inc. [Member] Cole Real Estate Investments, Inc. [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Cole REITs [Member] Managed Real Estate Investment Trusts [Member] Managed Real Estate Investment Trusts [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Equity in income and gain on disposition of unconsolidated entities Income (Loss) from Equity Method Investments and Realized Gain (Loss) on Disposal Income (Loss) from Equity Method Investments and Realized Gain (Loss) on Disposal Aggregate equity investments Gain included in other income, net Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Net (loss) income Income (Loss) from Equity Method Investments Accounting Policies [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] General and Administrative Expense [Member] General and Administrative Expense [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Employee Stock Option [Member] Employee Stock Option [Member] Restricted Stock [Member] Restricted Stock [Member] Time-Based Restricted Stock Units [Member] Time-Based Restricted Stock Units [Member] Time-Based Restricted Stock Units [Member] Long Term Incentive Target Awards [Member] Long Term Incentive Target Awards [Member] Long Term Incentive Target Awards [Member] Deferred Stock Units [Member] Deferred Stock Units [Member] Deferred Stock Units [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Equity Plan [Member] Equity Plan [Member] The grant of stock options, restricted shares of common stock, restricted stock units, dividend equivalent rights and other equity-based awards Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Cumulative Restricted share awards (shares) Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Shares, Gross Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Shares, Gross Cumulative Restricted share awards forfeited (shares) Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Shares, Forfeited Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Shares, Forfeited Cumulative Restricted Stock Units (shares) Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Stock Units, Gross Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Stock Units, Gross Cumulative Restricted Stock Units forfeited (shares) Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Stock Units, Forfeited Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Stock Units, Forfeited Cumulative Deferred Stock Units (shares) Stock Issued During Period, Shares, Share-based Compensation, Cumulative Deferred Stock Units, Gross Stock Issued During Period, Shares, Share-based Compensation, Cumulative Deferred Stock Units, Gross Cumulative Stock Options (shares) Stock Issued During Period, Shares, Share-based Compensation, Cumulative Stock Option Units, Gross Stock Issued During Period, Shares, Share-based Compensation, Cumulative Stock Option Units, Gross Cumulative stock options forfeited (shares) Stock Issued During Period Shares Sharebased Compensation Cumulative Stock Option Units, Forfeited Stock Issued During Period Shares Sharebased Compensation Cumulative Stock Option Units, Forfeited Shares issued in period (shares) Stock Issued During Period, Shares, Share-based Compensation, Gross Compensation expense Allocated Share-based Compensation Expense Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Weighted-average remaining term (years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Litigation and other non-routine costs: Other Non-Routine Costs [Abstract] Other Non-Routine Costs [Abstract] Audit Committee Investigation and related matters Other Non-Routine Costs, Audit Committee Investigation and Related Litigation Other Non-Routine Costs, Audit Committee Investigation and Related Litigation Legal fees and expenses Other Non-Routine Costs, Legal Fees And Expenses Other Non-Routine Costs, Legal Fees And Expenses Litigation settlements Other Non-Routine Costs, Other Fees And Expenses Other Non-Routine Costs, Other Fees And Expenses Total costs incurred Other Non-Routine Costs Other Non-Routine Costs Insurance recoveries Other Non-Routine Costs, Insurance Recoveries Other Non-Routine Costs, Insurance Recoveries Total Other Non-Routine Costs, Net of Insurance Recoveries Other Non-Routine Costs, Net of Insurance Recoveries Litigation settlement payment Litigation Settlement, Expense Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] CMBS [Member] Commercial Mortgage Backed Securities [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Number of securities owned Available-for-Sale Securities, Number of Positions Available-for-Sale Securities, Number of Positions Investment securities, at fair value Debt Securities, Available-for-sale Number of securities matured Available for Sale Securities, Number of Positions Matured Available for Sale Securities, Number of Positions Matured Proceeds from investments at maturity Proceeds from Sale and Maturity of Available-for-sale Securities and Other Assets Proceeds from Sale and Maturity of Available-for-sale Securities and Other Assets Interest rate Available for Sale Securities, Interest Rate Available for Sale Securities, Interest Rate Number of securities with fair value below amortized cost Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Other-than-temporary impairment losses Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Due to affiliates Due to Affiliate Earnings Per Share [Abstract] Summary of Basic and Diluted Net Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Real Estate [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Joint ventures [Member] Variable Interest Entity, Primary Beneficiary [Member] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Consolidated Properties [Member] Consolidated Properties [Member] Mortgages [Member] Mortgages [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] VEREIT Operating Partnership, L.P. [Member] VEREIT Operating Partnership, L.P. [Member] VEREIT Operating Partnership, L.P. [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Number of joint ventures Number of Consolidated Joint Ventures Number of Consolidated Joint Ventures Number of properties owned Number of Real Estate Properties Total assets Assets Real estate investments, net Real Estate Investment Property, Net Outstanding Balance Long-term Debt, Gross Net income (loss) attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Real Estate Properties [Table] Schedule of Real Estate Properties [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series F Preferred Stock [Member] Series F Preferred Stock [Member] Partner Type [Axis] Partner Type [Axis] Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] General Partner [Member] General Partner [Member] Limited Partner [Member] Limited Partner [Member] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Series F Cumulative Redeemable Preferred Stock, dividend rate Preferred Stock, Dividend Rate, Percentage Series F Cumulative Redeemable Preferred Stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share General partner ownership interest in OP Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Common equity interests owned by certain unaffiliated investors Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Partnership units, holding period until right to redeem Partnership Units, Holding Period Until Right to Redeem Partnership Units, Holding Period Until Right to Redeem Cash flows (used in) from operating activities Cash Provided by (Used in) Operating Activities, Discontinued Operations Cash flows from investing activities Cash Provided by (Used in) Investing Activities, Discontinued Operations Due within one year Loans Receivable, Future Minimum Payments Receivable, Next Rolling Twelve Months Loans Receivable, Future Minimum Payments Receivable, Next Rolling Twelve Months Due after one year through five years Loans Receivable, Future Minimum Payments Receivable, Rolling Years Two Through Five Loans Receivable, Future Minimum Payments Receivable, Rolling Years Two Through Five Due after five years through 10 years Loans Receivable, Future Minimum Payments Receivable, Rolling Years Six Through Ten Loans Receivable, Future Minimum Payments Receivable, Rolling Years Six Through Ten Due after 10 years Loans Receivable, Future Minimum Payments Receivable, Rolling after Year Ten Loans Receivable, Future Minimum Payments Receivable, Rolling after Year Ten Total Loans Receivable, Future Minimum Payments Receivable Loans Receivable, Future Minimum Payments Receivable Interest scheduled to be capitalized Loans Receivable, Interest Capitalized Loans Receivable, Interest Capitalized Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Total Stockholders’ Equity Parent [Member] Preferred Stock [Member] Preferred Stock [Member] Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss [Member] AOCI Attributable to Parent [Member] Accumulated Deficit [Member] Retained Earnings [Member] Non-Controlling Interests [Member] Noncontrolling Interest [Member] Series D Preferred Stock [Member] Series D Preferred Stock [Member] Preferred Stock [Member] Convertible Preferred Stock [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (shares) Shares, Outstanding Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Conversion of OP Units to common stock (shares) Stock Issued During Period, Shares, Conversion of Units Conversion of OP Units to common stock Stock Issued During Period, Value, Conversion of Units Repurchases of common stock under Share Repurchase Program (shares) Stock Repurchased During Period Under Stock Repurchase Program, Shares Stock Repurchased During Period Under Stock Repurchase Program, Shares Repurchases of common stock under Share Repurchase Programs Stock Repurchased During Period Under Stock Repurchase Program, Value Stock Repurchased During Period Under Stock Repurchase Program, Value Repurchases of common stock to settle tax obligation (shares) Stock Repurchased During Period, Shares Repurchases of common stock to settle tax obligation Stock Repurchased During Period, Value Equity-based compensation, net (shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Equity-based compensation, net Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Distributions declared on common stock Dividends Distributions to non-controlling interest holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distributions Dividends, Preferred Stock Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive loss (income) Other Comprehensive Income (Loss), Net of Tax Ending balance (shares) Ending balance Payables and Accruals [Abstract] Schedule of Accrued Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Mortgage Notes Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Net Income (Loss) Per Share/Unit Earnings Per Share [Text Block] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entities [Table] Entities [Table] Entity Information [Line Items] Entity Information [Line Items] 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 Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Litigation, Merger and Other Non-Routine Transaction Related Expenses Litigation and Other Non-Routine Costs [Table Text Block] Litigation and Other Non-Routine Costs [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Gross Amounts of Recognized Assets Derivative Asset, Fair Value, Gross Asset Gross Amounts of Recognized Liabilities Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset in the Consolidated Balance Sheets Derivative, Fair Value, Net Net Amounts of Assets Presented in the Consolidated Balance Sheets Derivative Asset Net Amounts of Liabilities Presented in the Consolidated Balance Sheets Derivative Liability Financial Instruments Derivative Collateral, Obligation to Return (Right to Reclaim) Securities Derivative Collateral, Obligation to Return (Right to Reclaim) Securities Cash Collateral Received Derivative Collateral, Obligation to Return (Right to Reclaim) Cash Derivative Collateral, Obligation to Return (Right to Reclaim) Cash Net Amount Derivative, Fair Value, Amount Offset Against Collateral, Net Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Reclassification of previous unrealized loss on interest rate derivatives into net income Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Total interest expense presented in the consolidated statements of operations in which the effects of cash flow hedges are recorded Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) Amount of gain recognized in income on cash flow hedges Derivative, Gain (Loss) on Derivative, Net Outstanding Balance Loans and Leases Receivable, Gross Carrying Value Loans and Leases Receivable, Net Amount Interest Rate Range Loans Receivable, Stated Interest Rate Loans Receivable, Stated Interest Rate Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-01 [Member] Accounting Standards Update 2016-01 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Gain (loss) on investments Gain (Loss) on Investments Number of properties subject to corporate leases Number of Properties Subject to Corporate Leases Number of Properties Subject to Corporate Leases Number of properties subject to ground leases Number of Properties Subject to Ground Leases Schedule of Rent and Tenant Receivables and Other Assets, Net Schedule of Tenant Receivables and Other Assets, Net [Table Text Block] Schedule of Tenant Receivables and Other Assets, Net [Table Text Block] Subsequent Events [Abstract] Schedule of Record and Payments Dates for Preferred Stock Dividends Schedule of Preferred Stock Dividends Payable, Record and Payment Dates [Table Text Block] Schedule of Preferred Stock Dividends Payable, Record and Payment Dates [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Measurement Input, Discount Rate [Member] Measurement Input, Discount Rate [Member] Measurement Input, Cap Rate [Member] Measurement Input, Cap Rate [Member] CCIT II [Member] CCIT II [Member] CCIT II [Member] CCPT V [Member] CCPT V [Member] CCPT V [Member] CCIT III [Member] CCIT III [Member] CCIT III [Member] 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] Reported Value Measurement [Member] Reported Value Measurement [Member] Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Weighted Average [Member] Weighted Average [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Shares redeemed (in shares) Stock Redeemed or Called During Period, Shares Number of years to commence liquidity event Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period Properties impaired Number of Impaired Properties Number of Impaired Properties Carrying value of real estate assets deemed to be impaired Real Estate Investment Property, Net, Impaired Real Estate Investment Property, Net, Impaired Estimated fair value of real estate assets deemed to be impaired Real Estate Investment Property, Net, Carrying Value of Impaired Property Real Estate Investment Property, Net, Carrying Value of Impaired Property Impairment charges Impairment of Real Estate Discount rates Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Alternative Investment, Measurement Input Alternative Investment, Measurement Input Weighted average capitalization rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Capitalization Rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Capitalization Rate Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Foreign Tax Authority [Member] Foreign Tax Authority [Member] Consolidated Property Dispositions, 2018 [Member] Consolidated Property Dispositions, 2018 [Member] Consolidated Property Dispositions, 2018 [Member] Red Lobster [Member] Red Lobster [Member] Red Lobster [Member] Consolidated Property Dispositions, 2017 [Member] Consolidated Property Dispositions, 2017 [Member] Consolidated Property Dispositions, 2017 [Member] Unconsolidated Property Dispositions, 2018 [Member] Unconsolidated Property Dispositions, 2018 [Member] Unconsolidated Property Dispositions, 2018 [Member] Property Disposition, 2018 [Member] Property Disposition, 2018 [Member] Property Disposition, 2018 [Member] Number of real estate properties disposed Number of Real Estate Properties Disposed Number of Real Estate Properties Disposed Number of properties secured by each non-recourse loan Debt Instrument Number of Properties Secured by Each NonRecourse Loan Debt Instrument Number of Properties Secured by Each NonRecourse Loan Number of real estate properties disposed in non monetary exchange Number of Real Estate Properties Disposed in Non-monetary Exchange Number of Real Estate Properties Disposed in Non-monetary Exchange Aggregate proceeds Proceeds from Sale of Productive Assets Company's share of proceeds Proceeds from Divestiture of Interest in Joint Venture Proceeds after debt assumptions and closing costs Proceeds from Sale of Real Estate Held-for-investment Debt assumed Notes Assumed Tax provision for the gain on sale of property Gain (Loss) on Sale of Properties, Applicable Income Taxes Gain (loss) related to sale Gain (Loss) on Sale of Properties Gain related to sale of unconsolidated entities Gains (Losses) on Sales of Investment Real Estate Number of disposed properties owned by unconsolidated joint ventures Number of Unconsolidated Joint Ventures Disposed of Number of Unconsolidated Joint Ventures Disposed of Proceeds from disposition of discontinued operations Proceeds from Divestiture of Businesses and Interests in Affiliates Proceeds from after debt repayments and closing costs Proceeds from Real Estate and Real Estate Joint Ventures Debt repayments Repayments of Debt Number of properties classified held for sale Number Of Real Estate Properties, Held for Sale Number Of Real Estate Properties, Held for Sale Carrying value of properties classified as held for sale Real Estate Held-for-sale Net gain (loss) on sale of properties Gain (Loss) on Disposition of Assets Statement of Financial Position [Abstract] Partner Capital Components [Axis] Partner Capital Components [Axis] Partner Capital Components [Domain] Partner Capital Components [Domain] Preferred Units [Member] Preferred stock, par value (in dollars per share) Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (shares) Preferred Stock, Shares Outstanding Common stock, shares authorized (shares) Common Stock, Shares Authorized Common stock, shares issued (shares) Common Stock, Shares, Issued Common stock, shares outstanding (shares) Common Stock, Shares, Outstanding General partners', units issued (shares) General Partners' Capital Account, Units Issued General partners', units outstanding (shares) General Partners' Capital Account, Units Outstanding Limited partners', units issued (shares) Limited Partners' Capital Account, Units Issued Limited partners', units outstanding (shares) Limited Partners' Capital Account, Units Outstanding Future Minimum Operating Lease Base Rent Payments Operating Leases, Future Minimum Payments Receivable [Abstract] July 1, 2018 - December 31, 2018 Operating Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year 2019 Operating Leases, Future Minimum Payments Receivable, in Two Years 2020 Operating Leases, Future Minimum Payments Receivable, in Three Years 2021 Operating Leases, Future Minimum Payments Receivable, in Four Years 2022 Operating Leases, Future Minimum Payments Receivable, in Five Years Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Total Operating Leases, Future Minimum Payments Receivable Future Minimum Direct Financing Lease Payments Capital Leases, Future Minimum Payments Receivable, Fiscal Year Maturity [Abstract] July 1, 2018 - December 31, 2018 Capital Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year 2019 Capital Leases, Future Minimum Payments, Receivable in Two Years 2020 Capital Leases, Future Minimum Payments, Receivable in Three Years 2021 Capital Leases, Future Minimum Payments, Receivable in Four Years 2022 Capital Leases, Future Minimum Payments, Receivable in Five Years Thereafter Capital Leases, Future Minimum Payments, Receivable Thereafter Total Capital Leases, Future Minimum Payments Receivable Number of properties subject to direct financing leases Capital Leased Assets, Number of Units Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Total gains and losses Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included in Other Comprehensive Income (Loss) [Abstract] Unrealized loss included in other comprehensive income, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Realized loss included in other income, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Unrealized gain included in other income, net Purchases, issuance, settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract] Return of principal received Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Principal Payments Received Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Principal Payments Received Amortization included in net income, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization Included in Earnings Sale of investments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Ending balance Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Acquisitions 2018 [Member] Acquisitions 2018 [Member] Acquisitions 2018 [Member] 2017 Acquisitions [Member] Acquisitions, 2017 [Member] Acquisitions, 2017 [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Number of properties acquired Number of Businesses Acquired Total purchase price of assets acquired Business Combination, Consideration Transferred Allowance for tenant improvements Tenant Improvements Number of land parcels acquired Number of Land Parcels Acquired Number of Land Parcels Acquired Capitalized acquisition costs Business Combination, Capitalized Acquisition Related Costs Business Combination, Capitalized Acquisition Related Costs Number of properties acquired in non-monetary exchange Number of Real Estate Properties Acquired in Non-monetary Exchange Number of Real Estate Properties Acquired in Non-monetary Exchange Equity [Abstract] Quarterly dividend of common stock declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Annualized dividend rate (in dollars per share) Dividends, Authorized Annual Dividends, Per Share Dividends, Authorized Annual Dividends, Per Share Revenue Recognition and Deferred Revenue [Abstract] Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement, by Type [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Service Agreement [Member] Service Agreement [Member] Service Agreement [Member] Deferred Revenue Arrangement [Line Items] Deferred Revenue Arrangement [Line Items] Total return on stockholders' capital, exceeding benchmark Revenue Recognition, Benchmark, Variable Consideration, Return On Stockholders' Capital Revenue Recognition, Benchmark, Variable Consideration, Return On Stockholders' Capital Service agreement, cost of services Service Agreement, Cost Of Services Service Agreement, Cost Of Services Other income, net Other Nonoperating Income (Expense) Contingent consideration, payment period Disposal Group, Including Discontinued Operation, Contingent Consideration, Payable Period Disposal Group, Including Discontinued Operation, Contingent Consideration, Payable Period Contingent consideration, maximum consideration receivable Disposal Group, Including Discontinued Operation, Expected Maximum Consideration, Contingent Consideration Disposal Group, Including Discontinued Operation, Expected Maximum Consideration, Contingent Consideration Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Fixed-rate debt [Member] Fixed Rate Debt [Member] Fixed Rate Debt [Member] Variable-rate debt [Member] Variable Rate Debt [Member] Variable Rate Debt [Member] Weighted-Average [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Encumbered Properties Gross Carrying Value of Collateralized Properties Debt Instrument, Collateral Amount Outstanding Balance Weighted-Average Interest Rate Debt, Weighted Average Interest Rate Weighted-Average Years to Maturity Debt Instrument, Term Mortgage notes in connection with default from non-recourse loan Debt Instrument, Debt Default, Amount Gain on extinguishment and forgiveness of debt, net Gain (Loss) on Extinguishment of Debt Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Schedule of Interest Rate Derivatives Schedule of Interest Rate Derivatives [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Offsetting Assets Offsetting Assets [Table Text Block] Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Effect of Hedging Activities in Statements of Operations Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [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] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] (Loss) Income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Noncontrolling interests’ share in continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Net (loss) income from continuing operations attributable to the General Partner/Operating Partnership Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Dividends to preferred units Preferred Stock Dividends and Other Adjustments Net income (loss) from continuing operations available to the General Partner/Operating Partnership Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Earnings allocated to participating units Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Income from discontinued operations, net of income taxes Income from discontinued operations attributable to limited partners Income (Loss) From Discontinued Operations, Attributable To Limited Partners Income (Loss) From Discontinued Operations, Attributable To Limited Partners Net (loss) income available to common stockholders used in basic net (loss) income per share Net Income (Loss) Available to Common Stockholders, Basic Income attributable to limited partners Net Income (Loss), Attributable To Limited Partners, Basic Net Income (Loss), Attributable To Limited Partners, Basic Net (loss) income available to common stockholders used in diluted net (loss) income per share Net Income (Loss) Available to Common Stockholders, Diluted Weighted average number of common stock outstanding - basic (shares) Weighted Average Number of Shares Outstanding, Basic Dilutive potential common shares - OP Units (shares) Weighted Average Number Diluted Shares Outstanding Adjustment Dilutive potential common shares - equity awards (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average number of common shares - diluted (shares) Weighted Average Number of Shares Outstanding, Diluted Basic and diluted net (loss) income per share from continuing operations attributable to common stockholders (in dollars per share) Income (Loss) from Continuing Operations, Per Basic and Diluted Share Basic and diluted net income per share from discontinued operations attributable to common stockholders (in dollars per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic and Diluted Share Basic and diluted net (loss) income per share attributable to common stockholders (in dollars per share) Earnings Per Share, Basic and Diluted Basic and diluted net (loss) income per unit from continuing operations attributable to common unitholders (in dollars per share) Income (Loss) from Continuing Operations, Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax Basic and diluted net income per unit from discontinued operations attributable to common unitholders (in dollars per share) Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted Basic and diluted net (loss) income per unit attributable to common unitholders (in dollars per share) Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax Class of Treasury Stock [Table] Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] The 2017 Share Repurchase Program [Member] The 2017 Share Repurchase Program [Member] The 2017 Share Repurchase Program [Member] The 2018 Share Repurchase Program [Member] The 2018 Share Repurchase Program [Member] The 2018 Share Repurchase Program [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Value of stock authorized for repurchase under stock repurchase program (up to) Stock Repurchase Program, Authorized Amount Stock authorization period Stock Repurchase Program, Period in Force Repurchases of common stock under the Share Repurchase Program (shares) Treasury Stock, Shares, Acquired Repurchases of common stock under the share repurchase program weighted average price per share (USD per share) Treasury Stock Acquired Weighted Average Cost Per Share Treasury Stock Acquired Weighted Average Cost Per Share Repurchases of common stock under the Share Repurchase Program Treasury Stock, Value, Acquired, Cost Method Number of shares available for repurchase Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Schedule of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Reconciliations of the changes in liabilities with Level 3 inputs Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Reconciliations of the changes in assets with Level 3 inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair value, by balance sheet grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Summary of impairment charges by asset class Impaired Assets to be Disposed of by Method Other than Sale [Table Text Block] Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative [Line Items] Derivative [Line Items] Number of Instruments Number of Interest Rate Derivatives Held Notional Amount Derivative, Notional Amount Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Limited Partner [Member] Class of Stock [Line Items] Class of Stock [Line Items] Number of units requested for redemption (shares) Stock Redeemed or Called During Period, Requests Under Review, Shares Stock Redeemed or Called During Period, Requests Under Review, Shares Income Statement [Abstract] Revenues: Revenues [Abstract] Rental income Operating Leases, Income Statement, Lease Revenue Operating expense reimbursements Management Fees and Reimbursement Revenue Represents operating revenues related to management fees and reimbursements. Total revenues Revenues Operating expenses: Operating Expenses [Abstract] Acquisition-related Business Combination, Acquisition Related Costs Litigation and other non-routine costs, net of insurance recoveries Litigation, Merger and Other Non-Routine Costs, Net of Insurance Recoveries Litigation, Merger and Other Non-Routine Costs, Net of Insurance Recoveries Property operating Cost of Other Property Operating Expense General and administrative General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization, Excluded Allocated To Operating Expenses Depreciation, Depletion and Amortization, Excluded Allocated To Operating Expenses Impairments Asset Impairment Charges Total operating expenses Operating Expenses Operating (loss) income Operating Income (Loss) Other (expense) income: Other Income and Expenses [Abstract] Interest expense Interest Income (Expense), Net Other income, net Gain on derivative instruments, net Gain (Loss) on Derivative Instruments, Net, Pretax Total other expenses, net Nonoperating Income (Expense) Loss before taxes and real estate dispositions Income (Loss) before Gain (Loss) on Sale of Properties and Income Taxes Income (Loss) before Gain (Loss) on Sale of Properties and Income Taxes Gain on disposition of real estate and real estate assets held for sale, net Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes (Loss) income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) (Loss) income from continuing operations Net (loss) income Net loss (income) attributable to non-controlling interests Net (loss) income attributable to the General Partner Net Income (Loss) Attributable to Parent Distributions declared per common share / unit (in dollars per share) 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] In-place leases and other intangible assets [Member] Leases, Acquired-in-Place and Other Intangibles [Member] Leases, Acquired-in-Place and Other Intangibles [Member] Above-market leases [Member] Above Market Leases [Member] Below-market leases [Member] Below Market Lease [Member] Below Market Lease [Member] Assets Acquired and Liabilities Assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Real estate investments, at cost: Real Estate Investments, Net [Abstract] Land Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land Buildings, fixtures and improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings, Fixtures and Improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings, Fixtures and Improvements Total tangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Real Estate Investment Acquired in Period Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Real Estate Investment Acquired in Period Acquired intangible assets: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract] Acquired intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Assumed intangible liabilities: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Liabilities [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Liabilities [Abstract] Below-market leases Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangible Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangible Liabilities Weighted-Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Below market lease, weighted average useful life Below Market Lease, Weighted Average Useful Life Below Market Lease, Weighted Average Useful Life Preferred stock, shares issued (shares) Series F preferred units (shares) Preferred stock, dividend rate (percent) Preferred stock, liquidation preference per share (in dollars per share) Preferred Stock, Liquidation Preference Per Share Dividend rate (in dollars per share) Preferred Stock, Dividend Rate, Per-Dollar-Amount Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] 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 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Assets: Assets, Fair Value Disclosure [Abstract] CMBS Mortgage-backed Securities Available-for-sale, Fair Value Disclosure Derivative assets Investment in Cole REITs Investments, Fair Value Disclosure Total assets Assets, Fair Value Disclosure Schedule of Mortgage Notes Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Aggregate Principal Payments Due on Mortgage Notes Receivable Schedule of Financing Receivables, Minimum Payments [Table Text Block] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Debt Debt Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Net (loss) income Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized (loss) gain on interest rate derivatives Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax Reclassification of previous unrealized loss on interest rate derivatives into net income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Unrealized loss on investment securities, net Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Total other comprehensive (loss) income Total comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss (income) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Total comprehensive (loss) income attributable to the General Partner / OP Comprehensive Income (Loss), Net of Tax, Attributable to Parent Corporate Bonds [Member] Unsecured Debt [Member] Convertible Debt [Member] Convertible Debt [Member] Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Aggregate Principal Payments of Mortgages Schedule of Maturities of Long-term Debt [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Interest Rate Swap [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Rent and Tenant Receivables and Other Assets, Net [Member] Rent and Tenant Receivables and Other Assets, Net [Member] Rent and Tenant Receivables and Other Assets, Net [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Audit Committee Investigation [Member] Audit Committee Investigation [Member] Audit Committee Investigation [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] SDNY Actions [Member] Southern District of New York Action [Member] Southern District of New York Action [Member] Vanguard Action [Member] Vanguard Action [Member] Vanguard Action [Member] Putative Class Action [Member] Putative Class Action [Member] Putative Class Action [Member] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending Litigation [Member] Pending Litigation [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of individuals in civil complaint Loss Contingency, Number of Defendants Number of claims Loss Contingency, Pending Claims, Number Holdings as a percent of total pending shareholder actions Litigation, Holdings of Plaintiff, Percent of Stock Holding of Pending Shareholder Actions Litigation, Holdings of Plaintiff, Percent of Stock Holding of Pending Shareholder Actions Stipulation of settlement, maximum attorney fees Litigation Settlement, Stipulation of Settlement, Expense, Maximum Litigation Settlement, Stipulation of Settlement, Expense, Maximum Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] 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 Depreciation, Depletion and Amortization Gain on real estate assets and joint venture, net Gains (Losses) on Sales of Investment Real Estate And Disposal of Discontinued Operations Gains (Losses) on Sales of Investment Real Estate And Disposal of Discontinued Operations Impairments Asset Impairment Charges Including Disposal Group and Discontinued Operations Asset Impairment Charges Including Disposal Group and Discontinued Operations Equity-based compensation Share-based Compensation Equity in income of unconsolidated entities Distributions from unconsolidated entities Proceeds from Equity Method Investment, Distribution Gain on investments Gain on derivative instruments, net Gain (Loss) on Extinguishment of Derivative Instruments, Net, Pretax Gain (Loss) on Extinguishment of Derivative Instruments, Net, Pretax Gain on extinguishment and forgiveness of debt, net Gains (Losses) on Extinguishment and Forgiveness of Debt Gains (Losses) on Extinguishment and Forgiveness of Debt Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Investment in direct financing leases Increase (Decrease) in Leasing Receivables Rent and tenant receivables and other assets, net Increase (Decrease) in Rent and Tenant Receivables and Other Assets, Net Increase (Decrease) in Rent and Tenant Receivables and Other Assets, Net Assets held for sale classified as discontinued operations Increase (Decrease) in Assets Held-for-sale Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred rent, derivative and other liabilities Increase (Decrease) in Deferred Revenue, Derivative Liabilities, and Other Liabilities Increase (Decrease) in Deferred Revenue, Derivative Liabilities, and Other Liabilities Due to affiliates Increase (Decrease) in Due to Affiliates Liabilities related to discontinued operations Increase (Decrease) in Liabilities Related to Discontinued Operations Increase (Decrease) in Liabilities Related to Discontinued Operations Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Investments in real estate assets Payments to Acquire Productive Assets Capital expenditures and leasing costs Payments for Capital Improvements Real estate developments Payments to Develop Real Estate Assets Principal repayments received on investment securities and mortgage notes receivable Proceeds from Collection of Notes Receivable Return of investment from unconsolidated entities Proceeds from Equity Method Investment, Distribution, Return of Capital Proceeds from disposition of real estate and joint venture Payments related to disposition of discontinued operations Payments for Divestiture of Businesses and Interests in Affiliates Payments for Divestiture of Businesses and Interests in Affiliates Investment in leasehold improvements and other assets Payments to Leasehold Improvements and Other Assets Payments to Leasehold Improvements and Other Assets Deposits for real estate assets Payments for Deposits on Real Estate Acquisitions Proceeds from sale of investments and other assets Uses and refunds of deposits for real estate assets Proceeds or Uses from Deposits on Real Estate Acquisitions Proceeds or Uses from Deposits on Real Estate Acquisitions Proceeds from the settlement of property-related insurance claims Proceeds from Insurance Settlement, Investing Activities Line of credit advances to Cole REITs Payments for (Proceeds from) Loans Receivable Line of credit repayments from Cole REITs Proceeds from Collection of Advance to Affiliate Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from mortgage notes payable Proceeds from Issuance of Secured Debt Payments on mortgage notes payable and other debt, including debt extinguishment costs Repayments of Secured Debt Proceeds from credit facility Proceeds from Long-term Lines of Credit Payments on credit facility Repayments of Long-term Lines of Credit Payments of deferred financing costs Payments of Financing Costs Repurchases of common stock under the Share Repurchase Program Payments for Repurchase of Common Stock Under Share Repurchase Program Payments for Repurchase of Common Stock Under Share Repurchase Program Repurchases of common stock to settle tax obligations Payments for Repurchase of Common Stock Distributions paid Payments of Dividends Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents and restricted cash, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Less: cash and cash equivalents of discontinued operations Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Cash and cash equivalents and restricted cash from continuing operations, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value Restricted cash at beginning of period Restricted Cash Cash and cash equivalents, and restricted cash, end of period Less: cash and cash equivalents of discontinued operations Cash and cash equivalents at end of period Restricted cash at end of period Cash and cash equivalents and restricted cash from continuing operations, end of period July 1, 2018 - December 31, 2018 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2019 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four 2022 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total Rent and Tenant Receivables and Other Assets, Net Tenant Receivables and Other Assets, Net [Text Block] Tenant Receivables and Other Assets, Net [Text Block] Schedule of Unrealized Gains and Losses on Investment Securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Maturity of CMBS Investments Classified by Contractual Maturity Date [Table Text Block] Outstanding balance Long-term Debt Weighted-average years to maturity Weighted-average interest rate Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Ground Leases [Member] Ground Leases [Member] Ground Leases [Member] Office Leases [Member] Office Leases [Member] Office Leases [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] July 1, 2018 - December 31, 2018 Operating Leases, Future Minimum Payments, Remainder of Fiscal Year 2019 Operating Leases, Future Minimum Payments, Due in Two Years 2020 Operating Leases, Future Minimum Payments, Due in Three Years 2021 Operating Leases, Future Minimum Payments, Due in Four Years 2022 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Delayed-Draw Term Loan [Member] Loans Payable [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR [Member] London Interbank Offered Rate (LIBOR) [Member] Base Rate [Member] Base Rate [Member] Federal Funds Rate [Member] Federal Funds Effective Swap Rate [Member] One Month LIBOR [Member] One Month LIBOR [Member] One Month LIBOR [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Maximum aggregate amount outstanding at any one time Line of Credit Facility, Maximum Amount Outstanding During Period Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Length of extension option Line of Credit Facility, Length of Extension Option Line of Credit Facility, Length of Extension Option Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Maximum leverage ratio (less than or equal to) Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Minimum fixed charge coverage ratio (of at least) Debt Instrument, Covenant, Fixed Charge Coverage Ratio, Minimum Maximum fixed charge coverage ratio required under the credit agreement. Secured leverage ratio (less than or equal to) Debt Instrument, Covenant, Secured Leverage Ratio, Maximum Debt Instrument, Covenant, Secured Leverage Ratio, Maximum Unencumbered asset value ratio (less than or equal to) Debt Instrument, Covenant, Unencumbered Asset Value Ratio, Maximum Debt Instrument, Covenant, Unencumbered Asset Value Ratio, Maximum Minimum unencumbered interest coverage ratio (of at least) Debt Instrument, Covenant, Unencumbered Interest Coverage Ratio, Minimum Debt Instrument, Covenant, Unencumbered Interest Coverage Ratio, Minimum Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Purchase Commitment [Member] Real Estate Investments Purchase Commitments [Member] Real Estate Investments Purchase Commitments [Member] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Number of purchase and sale agreements Number of Purchase Commitments Number of Purchase Commitments Percentage of voting interests acquired Purchase Commitment, Percentage Of Voting Interests Acquired Purchase Commitment, Percentage Of Voting Interests Acquired Aggregate purchase price Purchase Commitment, Aggregate Purchase Price Purchase Commitment, Aggregate Purchase Price Escrow deposits Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Offering-related fees and reimbursements [Member] Offering-Related Fees and Reimbursements [Member] Offering-Related Fees and Reimbursements [Member] Selling commissions [Member] Offering-Related Fees and Reimbursements, Selling Commissions [Member] Offering-Related Fees and Reimbursements, Selling Commissions [Member] Dealer manager and distribution fees [Member] Offering-Related Fees and Reimbursements, Dealer Manager And Distribution Fee Revenue [Member] Offering-Related Fees and Reimbursements, Dealer Manager And Distribution Fee Revenue [Member] Reimbursement revenue [Member] Offering-Related Fees and Reimbursements, Reimbursement Revenue [Member] Offering-Related Fees and Reimbursements, Reimbursement Revenue [Member] Transaction service fees and reimbursements [Member] Transaction Service Fees and Reimbursements [Member] Transaction Service Fees and Reimbursements [Member] Acquisition fees [Member] Transaction Service Fees and Reimbursements, Acquisition Fees [Member] Transaction Service Fees and Reimbursements, Acquisition Fees [Member] Reimbursement revenues [Member] Transaction Service Fees and Reimbursements, Reimbursement Revenues [Member] Transaction Service Fees and Reimbursements, Reimbursement Revenues [Member] Management fees and reimbursements [Member] Management Fees and Reimbursements [Member] [Member] Management Fees and Reimbursements [Member] [Member] Asset and property management fees and leasing fees [Member] Management Fees and Reimbursements, Asset and Property Management Fees and Leasing Fees [Member] Management Fees and Reimbursements, Asset and Property Management Fees and Leasing Fees [Member] Advisory and performance fee revenue [Member] Management Fees and Reimbursements, Advisory and Performance Fee Revenue [Member] Management Fees and Reimbursements, Advisory and Performance Fee Revenue [Member] Reimbursement revenues [Member] Management Fees and Reimbursements, Reimbursement Revenues [Member] Management Fees and Reimbursements, Reimbursement Revenues [Member] Selling commissions allowable [Member] Selling Commission Reimbursement [Member] Selling Commission Reimbursement [Member] Dealer manager fees reimbursement [Member] Offering-Related Fees and Reimbursements, Dealer Manager Fees Expense Reimbursement [Member] Offering-Related Fees and Reimbursements, Dealer Manager Fees Expense Reimbursement [Member] Affiliated Entity [Member] Affiliated Entity [Member] Related-party revenues Revenue from Related Parties Interest income on Affiliate Lines of Credit Interest Income, Related Party Selling commissions reallowed Revenue from Related Party, Percentage Revenue from Related Party, Percentage Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Aggregate gross sales price Estimated gain on sale of properties Aggregate purchase price Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Future Minimum Operating Lease Base Rent Payments Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Future Minimum Direct Financing Lease Payments Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Schedule of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Intangible Liabilities Schedule of Finite Lived Intangible Liabilities [Table Text Block] Schedule of Finite Lived Intangible Liabilities [Table Text Block] Schedule of Amortization Expense and Adjustments to Rental Income Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Mortgage Notes Payable and other debt, net [Member] Corporate Bonds, Net [Member] Convertible Debt, Net [Member] Senior Unsecured Note [Member] Senior Unsecured Note [Member] Senior Unsecured Note [Member] Convertible Senior Notes [Member] Convertible Senior Notes [Member] Convertible Senior Notes [Member] Credit Facilities [Member] Credit Facilities [Member] Credit Facilities [Member] Carrying Amount [Member] Fair Value [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Total assets Loans Receivable, Fair Value Disclosure Total liabilities Debt Instrument, Fair Value Disclosure Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation and Basis of Presentation Consolidation, Policy [Policy Text Block] Reclassification Reclassification, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Litigation and Other Non-routine Costs, Net of Insurance Recoveries Litigation and Other Non-Routine Transactions [Policy Text Block] Litigation and Other Non-Routine Transactions [Policy Text Block] Investment in Cole REITs Equity Method Investments [Policy Text Block] Equity-based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] General Partner [Member] Common stock repurchases (shares) Excluding balances from Cole REITs [Member] Excluding Line of Credit Transactions Related to Managed Real Estate Investment Trusts [Member] Excluding Line of Credit Transactions Related to Managed Real Estate Investment Trusts [Member] CCI III OP [Member] Corporate Income Operating Partnership Three [Member] Corporate Income Operating Partnership Three [Member] Variable interest rate Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate Interest rate Debt Instrument, Interest Rate, Effective Percentage Equity Stockholders' Equity Note Disclosure [Text Block] Accrued interest Interest Payable Accrued real estate taxes Accrual for Taxes Other than Income Taxes Accrued legal fees Accrued Professional Fees Accounts payable Accounts Payable Accrued other Other Accrued Liabilities Total Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Principles of Consolidation and Basis of Presentation Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Limited Partner OP Units outstanding (shares) Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table]