Noncontrolling Interest [Abstract] Minority Interest [Table] Noncontrolling Interest [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP, L.P. American Campus Communities Operating Partnership Limited Partnership [Member] This element represents American campus communities operating partnership limited partnership. Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Redeemable noncontrolling interests Temporary Equity Redeemable Noncontrolling Interests [Member] Redeemable Noncontrolling Interests Temporary Equity [Member] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Beginning balance Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Net income Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Conversion of OP Units into shares of ACC common stock Stock Issued During Period, Value, Conversion of Units Contributions by noncontrolling interests - partially owned properties Noncontrolling Interest, Increase from Contributions by Noncontrolling Partners Noncontrolling Interest, Increase from Contributions by Noncontrolling Partners Adjustments to reflect OP Units at fair value Adjustments To Additional Paid In Capital Increase In Carrying Amount Of Redeemable Noncontrolling Interest Adjustments To Additional Paid In Capital Increase In Carrying Amount Of Redeemable Noncontrolling Interest Ending balance 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] Unsecured notes, net Unsecured Notes [Member] Unsecured Notes [Member] Unsecured term loans, net Unsecured Term Loans [Member] Unsecured Term Loans [Member] Unsecured revolving credit facility Revolving Credit Facility [Member] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Wholly-owned properties, net Wholly Owned Properties [Member] On-campus participating properties, net On Campus Participating Properties [Member] This element represents on campus participating properties. In-process development properties In-Process Development Properties [Member] In-Process Development Properties [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Mortgage loans payable Mortgages [Member] Construction loans payable Construction Loan Payable [Member] Bonds payable Bonds [Member] Unsecured debt Unsecured Debt [Member] Term loans Notes Payable, Other Payables [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Principal outstanding Long-term Debt, Gross Unamortized deferred financing costs Debt Issuance Costs, Net Unamortized debt premiums Debt Instrument, Unamortized Premium Secured mortgage, construction and bond debt, net Secured Debt Total debt, net Long-term Debt Unsecured debt Unsecured Debt Number of properties sold Number Of Properties Sold This element represents number of properties sold. Unamortized original issue discount Debt Instrument, Unamortized Discount Leases [Abstract] Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, Payment, Due [Abstract] 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 Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total minimum lease payments Lessee, Operating Lease, Liability, Payments, Due Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total lease liabilities Operating Lease, Liability Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 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 minimum lease payments Operating Leases, Future Minimum Payments Due Schedule of Future Minimum Commitments of Operating Leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Expense Interest Expense [Member] Derivative [Line Items] Derivative [Line Items] Change in fair value of derivatives recognized in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Termination of interest rate swap payment recognized in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification Of Termination Of Interest Rate Swaps, Before Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification Of Termination Of Interest Rate Swaps, Before Tax Amortization of interest rate swap terminations Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Interest expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded Interest Expense Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Lessor, Lease Arrangement [Axis] Lessor, Lease Arrangement [Axis] Lessor, Lease Arrangement [Axis] Lessor, Lease Arrangement [Domain] Lessor, Lease Arrangement [Domain] [Domain] for Lessor, Lease Arrangement [Axis] Student Lease Property Student Lease Property [Member] Student Lease Property [Member] Commercial Lease Property Commercial Lease Property [Member] Commercial Lease Property [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Number ground/facility and office space lease agreements Lessee, Operating Lease, Number Of Contracts Lessee, Operating Lease, Number Of Contracts Lease terms Lessee, Operating Lease, Term of Contract Straight line rent expense Operating Lease, Cost Variable rent expense Variable Lease, Cost Capitalized rent cost Operating Lease, Capitalized Rent Cost Operating Lease, Capitalized Rent Cost Right-of-use assets Operating Lease, Right-of-Use Asset Weighted average incremental borrowing rate Operating Lease, Weighted Average Discount Rate, Percent Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Lease income Operating Lease, Lease Income Fair Value Disclosures [Abstract] Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] 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] Level 3 Fair Value, Inputs, Level 3 [Member] Owned properties, net Variable rate mortgage loans Variable Rate Mortgage Loans [Member] Variable Rate Mortgage Loans [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Estimated Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Loans receivable Loans Receivable, Fair Value Disclosure Liabilities: Liabilities, Fair Value Disclosure [Abstract] Unsecured notes Unsecured Notes Fair Value Disclosure Fair value portion of unsecured notes payable. Mortgage loans payable (fixed rate) Loans Payable, Fair Value Disclosure Bonds payable Notes Payable, Fair Value Disclosure Number of mortgage loans Number Of Loans Number Of Loans Segment Reporting [Abstract] Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Property management fees from external customers Management Service [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating segments Operating Segments [Member] Unallocated Corporate, Non-Segment [Member] Statement Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] On-campus participating properties Third-party development services Development Services [Member] Development Services [Member] Property Management Services Property Management Services [Member] Property Management Services [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Rental revenues and other income Operating Leases, Income Statement, Lease Revenue Interest income Interest and Other Income Total revenues Revenues Operating expenses before depreciation, amortization, and ground/facility lease expense Operating Expenses Excluding General Administrative Depreciation and Lease Expense Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes general, administrative, depreciation and lease expense. Ground/facility lease expense Lease, Cost Interest expense, net Operating income before depreciation and amortization Segment Reporting Information Operating Income Loss Before Depreciation and Amortization This element represents segment reporting information, operating income (loss) before depreciation and amortization. Depreciation and amortization Other Depreciation and Amortization Capital expenditures Payments to Acquire Productive Assets Development and construction management fees Development and Management Fees Revenue The total amount of revenue recognized for the period from development and management fees revenue. Operating expenses Operating Expenses Total consolidated revenues, including interest income Total Consolidated Revenues Including Interest Income Total Consolidated Revenues Including Interest Income Segment operating income before depreciation and amortization Operating Income (Loss) (Loss) gain from disposition of real estate Gain (Loss) on Disposition of Real Estate Gain (Loss) on Disposition of Real Estate Other operating income Other Operating And Nonoperating Income (Expense) Other Operating And Nonoperating Income (Expense) Loss from extinguishment of debt, net Gain (Loss) on Extinguishment of Debt Provision for real estate impairment Impairment of Real Estate Income tax provision Income Tax Expense (Benefit) Net income Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Presale development properties Presale Development Properties [Member] Presale Development Properties [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Number of presale agreements Number of Presale Agreements Number of Presale Agreements Number of properties, under development Number of Properties, Under Development Number of Properties, Under Development Number of beds Number Of Available Beds This element represents information pertaining to number of available beds. Estimated development costs Asset Acquisition, Pre-Sale Arrangement Purchase Price Asset Acquisition, Pre-Sale Arrangement Purchase Price Mezzanine financing Financing Receivable, before Allowance for Credit Loss Share-based Payment Arrangement [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] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2018 Incentive Award Plan 2018 Incentive Award Plan [Member] 2018 Incentive Award Plan [Member] Title of Individual [Axis] Title of Individual [Axis] Title of Individual [Domain] Title of Individual [Domain] Select Employees and Directors Select Employees and Directors [Member] Select Employees and Directors [Member] Board of Directors Chairman Board of Directors Chairman [Member] All Other [Member] All Other [Member] All Other [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted stock units (RSUs) Restricted Stock Units (RSUs) [Member] Restricted stock awards Restricted Stock Awards [Member] Restricted Stock Awards [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Common stock reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Shares granted (in shares) Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture Allocated share-based compensation expense Share-based Payment Arrangement, Expense Cover page. Entities [Table] Entities [Table] Document Information [Line Items] Document Information [Line Items] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province City Area Code City Area Code Local Phone Number Local Phone Number Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Common Stock Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Real Estate [Abstract] Schedule of Real Estate Properties [Table] Schedule of Real Estate Properties [Table] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Investments in Owned Properties Real Estate Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Description of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Major Property Class [Axis] Major Property Class [Axis] Major Property Class [Domain] Major Property Class [Domain] Under Development Under Development [Member] Under Development [Member] Land Land Buildings and improvements Buildings and Improvements, Gross Furniture, fixtures and equipment Furniture and Fixtures, Gross Construction in progress Construction in Progress, Gross Real estate properties gross Real Estate Investment Property, at Cost Less accumulated depreciation Real Estate Owned, Accumulated Depreciation Owned properties, net Real Estate Investment Property, Net Undeveloped land parcels Land Available for Development Accounting Policies [Abstract] Schedule Of Property Plant and Equipment [Table] Property, Plant and Equipment [Table] Real Estate Property Class [Axis] Real Estate Property Class [Axis] Represents information about real estate classes used to group the loan on real estate. Real Estate Property Class [Domain] Real Estate Property Class [Domain] Represents information about real estate classes used to group the loan on real estate. Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Buildings and improvements Building and Building Improvements [Member] Leasehold interest Leaseholds and Leasehold Improvements [Member] Furniture, fixtures and equipment Furniture, Fixtures and Equipment [Member] Equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases and other equipments. Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Estimated useful life Property, Plant and Equipment, Useful Life Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Owned properties under development Owned Properties Under Development [Member] Owned Properties Under Development [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common and preferred units Common and Preferred Units [Member] Common and Preferred Units [Member] Unvested restricted awards Unvested Restricted Stock Awards [Member] Unvested Restricted Awards [Member] Noncontrolling interests - partially owned properties Partially Owned Properties [Member] Statement [Line Items] Statement [Line Items] 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] Loss (gain) from disposition of real estate Gain (Loss) on Sale of Properties Loss from early extinguishment of debt Provision for real estate impairment Depreciation and amortization Depreciation, Depletion and Amortization Amortization of deferred financing costs and debt premiums/discounts Amortization of Debt Issuance Costs and Discounts Share-based compensation Share-based Payment Arrangement, Noncash Expense Income tax provision Deferred Income Tax Expense (Benefit) Amortization of interest rate swap terminations and other Amortization of Interest Rate Swap Terminations and Other Amortization of Interest Rate Swap Terminations and Other Termination of interest rate swaps Payments for Termination of Derivative Instrument Payments for Termination of Derivative Instrument Student contracts receivable Increase (Decrease) in Operating Capital [Abstract] Student contracts receivable Increase (Decrease) in Accounts Receivable Other assets Increase (Decrease) in Other Operating Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from disposition of properties and land parcels Proceeds from Sale of Real Estate Held-for-investment Capital expenditures Payments for Capital Improvements Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from unsecured notes Proceeds from Unsecured Notes Payable Pay-off of mortgage and construction loans Repayment Of Mortgage and Construction Loans The cash outflow from repayment of borrowings to finance the cost of construction and repayment of mortgage loans. Defeasance costs related to early extinguishment of debt Payment for Debt Extinguishment or Debt Prepayment Cost Defeasance costs related to early extinguishment of debt Repayments of Unsecured Debt Proceeds from revolving credit facility Proceeds from Lines of Credit Paydowns of revolving credit facility Repayments of Lines of Credit Proceeds from construction loans Proceeds from Construction Loans Payable Proceeds from mortgage loans Proceeds from Issuance of Secured Debt Scheduled principal payments on debt Repayments of Secured Debt Debt issuance costs Payments of Debt Issuance Costs Contribution by noncontrolling interests Proceeds from Noncontrolling Interests Taxes paid on net-share settlements Payment, Tax Withholding, Share-based Payment Arrangement Distributions paid to common and restricted stockholders Payments To Common Stock and Restricted Stockholders The cash outflow from payments to common stock and restricted stockholders. Distributions paid to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Distributions Payments of Dividends Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents, and restricted cash at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents, and restricted cash at end of period Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Total cash, cash equivalents, and restricted cash at end of period Supplemental disclosure of non-cash investing and financing activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Conversion of common and preferred operating partnership units to common stock Stock Issued Non-cash contribution from noncontrolling interest Proceeds from Divestiture of Interest in Joint Venture Accrued development costs and capital expenditures Other Significant Noncash Transaction, Accrued Development Costs and Capital Expenditures Other Significant Noncash Transaction, Accrued Development Costs and Capital Expenditures Change in fair value of derivative instruments, net Increase Decrease In Fair Value Of Interest Rate Swaps Net This element represents information about increase / (decrease) in fair value of interest rate swaps, net. Change in fair value of redeemable noncontrolling interest Increase (Decrease) in Fair Value of Redeemable Noncontrolling Interests Increase (Decrease) in Fair Value of Redeemable Noncontrolling Interests Change in ownership of consolidated subsidiary Increase (Decrease) From Subsidiary Equity Issuance Increase (Decrease) From Subsidiary Equity Issuance Initial recognition of operating lease right of use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Initial recognition of operating lease liabilities Increase (Decrease) In Operating Lease Liability Increase (Decrease) In Operating Lease Liability Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Schedule of summarized activity of redeemable limited partners Redeemable Noncontrolling Interest [Table Text Block] Schedule of summary of outstanding consolidated indebtedness, including unamortized debt premiums and discounts Schedule of Debt [Table Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Three off-campus properties University Village at Sweet Home, University Centre, and Villas at Chestnut Ridge [Member] University Village at Sweet Home, University Centre, and Villas at Chestnut Ridge [Member] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] Core Transaction Core Transaction [Member] Core Transaction [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Operating Partnership Operating Partnership [Member] Operating Partnership [Member] Common OP Unit Common OP Unit [Member] Common OP Unit [Member] Noncontrolling Interest [Line Items] Number of third-party joint venture partners (entities) Number Of Entities That Third Parties Held Non Controlling Ownership Number of entities that third parties held non controlling ownership. Number of properties Number of Real Estate Properties Number of joint ventures Number of Real Estate Properties Through Joint Venture Number of Real Estate Properties Through Joint Venture Equity interests held by owners of common units and preferred units (percent) Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Conversion of operating partnership units to common stock (in shares) Stock Issued During Period, Shares, Conversion of Units Derivatives Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Identified reportable segments (segments) Number of Reportable Segments Stockholders' Equity Note [Abstract] Schedule Of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Non-Qualified Deferred Compensation Plan Non-Qualified Deferred Compensation Plan [Member] Non-Qualified Deferred Compensation Plan [Member] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] ATM Equity Program ATM Equity Program [Member] ATM Equity Program [Member] At The Market Program Expired May 2018, Included In ATM Equity Program At The Market Program Expired May 2018, Included In ATM Equity Program [Member] At The Market Program Expired May 2018, Included In ATM Equity Program [Member] Treasury Stock Treasury Stock [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] ATM equity program, aggregate offering price authorized (up to $500 million) Sale Of Stock, Maximum Aggregate Offering Price Sale Of Stock, Maximum Aggregate Offering Price Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired Number of shares withdrawn from deferred compensation plan (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Number of shares in deferred compensation plan (in shares) Treasury Stock, Shares Management And Leasing Services Management and Leasing Services [Member] This element represents management and leasing services. Investments in real estate, net Real Estate Investment [Member] Off Campus Properties Off Campus Properties [Member] This element represents off campus properties. American Campus Equity American Campus Equity [Member] This element represents American campus equity. Ownership interest (percent) Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Limited partner interest (percent) Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Number of housing properties Number Of Housing Properties This element represents the number of student housing properties. Number of properties under development Number of Real Estate Properties Under Construction Number of Real Estate Properties Under Construction Initial term of contract Management and Leasing Services, Initial Term of Contract Management and Leasing Services, Initial Term of Contract Segments Segment Reporting Disclosure [Text Block] Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] ACC/Allianz Joint Venture ACC/Allianz Joint Venture [Member] ACC/Allianz Joint Venture [Member] Allianz Real Estate Allianz Real Estate [Member] Allianz Real Estate [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] ACC/Allianz Joint Venture Transaction ACC/Allianz Joint Venture Transaction [Member] ACC/Allianz Joint Venture Transaction [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group, Not Discontinued Operations Disposal Group, 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] Sale of property Disposal Group, Including Discontinued Operation, Consideration Payments to Acquire Interest in Joint Venture Payments to Acquire Interest in Joint Venture Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Fair Value Disclosures Fair Value Disclosures [Text Block] Statement of Stockholders' Equity [Abstract] Partner Type [Axis] Partner Type [Axis] Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] General Partner General Partner [Member] Limited Partner Limited Partner [Member] Common Shares Common Stock [Member] Additional Paid in Capital Additional Paid-in Capital [Member] Common Shares Held in Rabbi Trust Common Stock Held in Rabbi Trust [Member] Common Stock Held in Rabbi Trust [Member] Accumulated Earnings and Dividends Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Noncontrolling Interests – Partially Owned Properties Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Equity, Beginning (in shares) Shares, Outstanding Equity, Beginning Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Capital, Beginning (in units) Partners' Capital Account, Units Capital, Beginning Partners' Capital, Including Portion Attributable to Noncontrolling Interest Adjustments to reflect redeemable noncontrolling interests at fair value Adjustments to Additional Paid in Capital, Increase in Carrying Amount of Redeemable Preferred Stock Amortization of restricted stock awards and vesting of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Units, Gross Stock Issued During Period, Shares, Restricted Stock Units, Gross Amortization of restricted stock awards APIC, Share-based Payment Arrangement, Increase for Cost Recognition Vesting of restricted stock awards (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Vesting of restricted stock awards Stock Issued During Period, Value, Restricted Stock Award, Gross Distributions to common and restricted unit holders and other Noncontrolling Interest, Decrease From Distributions Decrease in noncontrolling interest balance from distribution. Distributions to common and restricted stockholders/unit holders and other Dividends Distributions to noncontrolling interests - partially owned properties Change in ownership of consolidated subsidiary Adjustments To Additional Paid In Capital, Increase From Subsidiary Equity Issuance Adjustments To Additional Paid In Capital, Increase From Subsidiary Equity Issuance Conversion of common and preferred operating partnership units to common stock (in shares) Conversion of common and preferred operating partnership units to common stock Change in fair value of interest rate swaps and other Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Termination of interest rate swaps Withdrawals from deferred compensation plan, net of deposits (in shares) Withdrawals from deferred compensation plan, net of deposits Stock Issued During Period, Value, Treasury Stock Reissued Net income Net Income Loss Excluding Redeemable Noncontrolling Interest The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest, but excluding the redeemable noncontrolling interest. Equity, Ending (in shares) Equity, Ending Capital, Ending (in units) Capital, Ending Property Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Lease Arrangements [Axis] Lease Arrangements [Axis] Lease Arrangements [Axis] Lease Arrangements [Domain] Lease Arrangements [Domain] [Domain] for Lease Arrangements [Axis] Corporate Office Headquarters Corporate Office Headquarters [Member] Corporate Office Headquarters [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Owned property held for sale Wholly Owned Properties Held For Sale [Member] Wholly Owned Properties Held For Sale [Member] Six joint ventures Six Joint Ventures [Member] Six Joint Ventures [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Number of ground leases Number of Properties Subject to Ground Leases Number of corporate office headquarters leases Lessee, Operating, Number Of Asset Under Lease Lessee, Operating, Number Of Asset Under Lease Operating lease liabilities Provision for uncollectible accounts Provision for Loan, Lease, and Other Losses Capitalized interest Interest Costs Capitalized Number of properties subject to presale arrangements Summary of restricted stock units and awards Share-based Payment Arrangement, Restricted Stock Unit, Activity [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] Schedule of accounting pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of estimated useful lives of assets Property, Plant and Equipment [Table Text Block] Schedule of potentially dilutive securities not included in calculating diluted earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of summary of elements used in calculating basic earnings per share/unit Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Statement of Financial Position [Abstract] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Cash, cash equivalents and restricted cash Cash and Cash Equivalents [Member] Other assets Other Assets [Member] Secured mortgage and construction debt, net Secured Debt [Member] Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities [Member] Consolidated variable interest entities' assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Consolidated variable interest entities' liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Common stock held in Rabbi Trust (in shares) General partner, OP units outstanding (in units) General Partners' Capital Account, Units Outstanding Limited partner, OP units outstanding (in units) Limited Partners' Capital Account, Units Outstanding Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Land Land [Member] Blanton Common at Valdosta State University Property Disposition Blanton Common At Valdosta State University Property Disposition [Member] Blanton Common At Valdosta State University Property Disposition [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Dividends [Axis] Dividends [Axis] Dividends [Domain] Dividends [Domain] Dividend Declared Dividend Declared [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Distributions declared per common unit (in dollars per unit) Distributions Per Limited Partnership Unit Outstanding, Basic Sale of property Extinguishment of Debt, Amount Income Statement [Abstract] Third-party management services Resident services Resident Services [Member] Resident Services [Member] Owned properties Revenues: Revenues [Abstract] Owned properties and on-campus participating properties revenue Contract with customer, revenue Revenue from Contract with Customer, Excluding Assessed Tax Operating expenses: Operating Expenses [Abstract] Operating expenses Third-party development and management services Construction and Development Costs and Service Management Costs The aggregate costs related to construction and development services during the reporting period. Additionally, this element represents the aggregate costs related to delivering management services during the reporting period. General and administrative General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Ground/facility leases Loss (gain) from disposition of real estate Other operating income Other Operating Income Total operating expenses Operating income Nonoperating income (expenses): Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest Interest expense Amortization of deferred financing costs Amortization of Debt Issuance Costs Loss from early extinguishment of debt Total nonoperating expenses Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax provision Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to ACC, Inc. and Subsidiaries common stockholders Net Income (Loss) Attributable to Parent Series A preferred unit distributions Preferred Stock Dividends and Other Adjustments Net income attributable to common unitholders Net Income (Loss) Available to Common Unitholders Net Income (Loss) Available to Common Unitholders Other comprehensive (loss) income Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Change in fair value of interest rate swaps and other Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net income per share attributable to ACC, Inc. and Subsidiaries common shareholders Earnings Per Share, Basic [Abstract] Basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Net income per share attributable to ACC, Inc. and Subsidiaries common shareholders Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax [Abstract] Basic and diluted (in dollars per share) Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted-average common units outstanding Weighted Average Number Basic and Diluted Units Outstanding [Abstract] -- None. No documentation exists for this element. -- Basic (in units) Weighted Average Limited Partnership Units Outstanding, Basic Diluted (in units) Weighted Average Limited Partnership Units Outstanding, Diluted Leases Lessor, Operating Leases [Text Block] Leases Lessee, Operating Leases [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance (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 Settled in common shares (in shares) Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Exercise, Common Stock Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Exercise, Common Stock Settled in cash (in shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Exercised, Cash Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Exercised, Cash 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 Ending balance (shares) Fair Value Assets and Liabilities Measured On Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] 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] Assets Assets [Abstract] Derivative financial instruments Derivative Asset Liabilities: Liabilities [Abstract] Derivative financial instruments Derivative Liability Mezzanine: Redeemable Noncontrolling Interest, Equity, Fair Value [Abstract] Redeemable noncontrolling interests (Company)/Redeemable limited partners (Operating Partnership) Redeemable Noncontrolling Interest, Equity, Fair Value Subsequent Events Subsequent Events [Text Block] Schedule of summary of outstanding interest rate swap contracts Schedule of Interest Rate Derivatives [Table Text Block] Schedule of fair value of derivative financial instruments and classification on consolidated balance sheet Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of effect of derivative financial instruments on the income statement Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of financial instruments measured at fair value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of estimated fair value and related carrying amounts of mortgage loans and bonds payable Fair Value, by Balance Sheet Grouping [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Incentive Award Plan Share-based Payment Arrangement [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Other Commitments [Axis] Other Commitments [Axis] Other Commitments [Domain] Other Commitments [Domain] Construction Contracts Construction Contracts [Member] Drexel University Property Drexel University Property [Member] Drexel University Property [Member] Consolidated properties Consolidated Properties [Member] Disney College Program Phases I-V (ACE) Disney College Program Phases I-V (ACE) [Member] Disney College Program Phases I-V (ACE) [Member] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Scenario, Forecast Forecast [Member] Guarantee Obligations By Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantee Obligations Nature [Domain] Guarantor Obligations, Nature [Domain] Alternate Housing Guarantees Alternate Housing Guarantees [Member] Alternate Housing Guarantees [Member] Project Cost Guarantees Project Cost Guarantees [Member] Project Cost Guarantees [Member] Third-Party Development Projects Third-Party Development Projects [Member] Third-Party Development Projects [Member] Performance Guarantee Performance Guarantee [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Development projects under construction Other Commitment Period of option to purchase remaining interest in joint venture Business Combination, Period Of Option To Purchase Remaining Interest In Joint Venture Business Combination, Period Of Option To Purchase Remaining Interest In Joint Venture Asset acquisition, consideration transferred Asset Acquisitions, Consideration Transferred Asset Acquisitions, Consideration Transferred Number of presale agreements Number Of Presale Agreements, Entered Into Over Time Number Of Presale Agreements, Entered Into Over Time Estimated development costs, remaining obligation to be funded Pre-Sale Arrangement Purchase Price, Remaining Obligation To Be Funded Pre-Sale Arrangement Purchase Price, Remaining Obligation To Be Funded Guarantee expiration period Commitments Expiration Period Period of expiration commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Commitment under third-party development project Guarantee Obligations, Maximum Exposure, Owner Caused Delays Guarantee Obligations, Maximum Exposure, Owner Caused Delays Alternate housing costs and excess project costs Guarantee Obligations, Alternate Housing Costs And Excess Project Costs, Maximum Exposure, Owner Caused Delays Guarantee Obligations, Alternate Housing Costs And Excess Project Costs, Maximum Exposure, Owner Caused Delays Estimate of possible loss Loss Contingency, Estimate of Possible Loss Development guarantee, damages due per bed each day of a delay Development Guarantee, Damages Due Per Bed Each Day Delay Occurs Development Guarantee, Damages Due Per Bed Each Day Delay Occurs Guarantor obligations, maximum exposure Guarantor Obligations, Maximum Exposure, Undiscounted Earnest money deposits Earnest Money Deposits Lease term Lease Term This element represents the lease term. Number of lease renewal options Number Of Renewal Options This element represents the number of renewal options. Lease extension period Lease Extension Period This element represents the lease extension period. Commitment to pay real estate transfer taxes, amount (not more than) Long-term Purchase Commitment, Real Estate Transfer Taxes, Amount Long-term Purchase Commitment, Real Estate Transfer Taxes, Amount Real estate transfer taxes paid upon conveyance of land Payments for Real Estate Transfer Taxes Payments for Real Estate Transfer Taxes Deferred pre-development costs Deferred Costs, Noncurrent Purchase and sale agreement upon exercise of option Purchase And Sale Agreement Upon Exercise Of Option Purchase And Sale Agreement Upon Exercise Of Option Stockholders' Equity / Partners' Capital Stockholders' Equity Note Disclosure [Text Block] Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Debt Debt Disclosure [Text Block] Schedule of segment information Schedule of Segment Reporting Information, by Segment [Table Text Block] On-campus participating properties, net Investments in real estate: Real Estate Investment Property, Net [Abstract] Investments in real estate, net Student contracts receivable Accounts Receivable, after Allowance for Credit Loss Other assets Other Assets Total assets Assets Liabilities and equity Liabilities and Equity [Abstract] Secured mortgage, construction and bond debt, net Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Other liabilities Other Liabilities Total liabilities Liabilities Commitments and contingencies (Note 13) Commitments and Contingencies Redeemable noncontrolling interests Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] American Campus Communities, Inc. and Subsidiaries stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.01 par value, 800,000,000 shares authorized, 137,200,511 and 136,967,286 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively Common Stock, Value, Outstanding Additional paid in capital Additional Paid in Capital, Common Stock Common stock held in rabbi trust, 75,535 and 69,603 shares at June 30, 2019 and December 31, 2018, respectively Treasury Stock, Value Accumulated earnings and dividends Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total American Campus Communities, Inc. and Subsidiaries stockholders’ equity Stockholders' Equity Attributable to Parent Noncontrolling interests - partially owned properties Stockholders' Equity Attributable to Noncontrolling Interest Total equity Capital: Partners' Capital, Including Portion Attributable to Noncontrolling Interest [Abstract] Partners’ capital: Partners' Capital [Abstract] General partner - 12,222 OP units outstanding at both June 30, 2019 and December 31, 2018 General Partners' Capital Account Limited partner - 137,263,824 and 137,024,667 OP units outstanding at June 30, 2019 and December 31, 2018, respectively Limited Partners' Capital Account Total partners’ capital Partners' Capital Noncontrolling interests - partially owned properties Partners' Capital Attributable to Noncontrolling Interest Total capital Total liabilities and equity / capital Liabilities and Equity Senior notes Senior Notes [Member] Senior notes - April 2013 Senior Notes - April 2013 [Member] Senior Notes - April 2013 [Member] Senior notes - June 2014 Senior Notes - June 2014 [Member] Senior Notes - June 2014 [Member] Senior notes - September 2015 Senior Notes - September 2015 [Member] Senior Notes - September 2015 [Member] Senior notes - October 2017 Senior Notes - October 2017 [Member] Senior Notes - October 2017 Senior Notes - June 2019 Senior Notes - June 2019 [Member] Senior Notes - June 2019 [Member] Amount Debt Instrument, Face Amount % of Par Value Debt Instrument Proceeds As Percentage Of Par Value Represents percentage of proceedings received as to par value, proceeding above the part value represents premium and below the par value signifies discount. Coupon (percent) Debt Instrument, Interest Rate, Stated Percentage Yield (percent) Debt Instrument, Interest Rate, Effective Percentage Original Issue Discount Debt Instrument Original Issue Discount This element represents amount of recorded original issue discount on debt instrument. Term (Years) Debt Instrument Maturity Period Represents a period when debt instrument is scheduled to be fully repaid. Schedule of Earnings Per Share [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Unvested restricted stock awards Earnings Per Share [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Numerator – basic and diluted earnings per unit: Earnings Per Unit [Abstract] Net income Amount allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic and Diluted Undistributed Earnings (Loss) Allocated to Participating Securities, Basic and Diluted Net income attributable to common unitholders Income Loss From Continuing Operations Attributable To Parent Net Of Amount Allocated To Participating Securities This element represents income (loss) from continuing operations attributable to parent, net of amount allocated to participating securities. Denominator: Denominator [Abstract] -- None. No documentation exists for this element. -- Basic weighted average common units outstanding (in units) Unvested restricted stock awards (in units) Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Diluted weighted average common units outstanding (in units) Earnings per unit: Net income attributable to common unitholders - basic and diluted (in units) Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] Common OP Units Common Units [Member] This element represents information regarding common units. Preferred OP Units Preferred Units [Member] This element represents information regarding preferred units. Potential dilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of real estate properties Schedule of Real Estate Properties [Table Text Block] Distributions declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swap contracts Interest Rate Swap [Member] Number of forward starting interest rate swap contracts Number of Interest Rate Derivatives Held Notional amount Derivative, Notional Amount Termination of interest rate swaps Interest Rate Swap - 2.275% Fixed Rate Interest Rate Swap 1 - Two Point Two Seven Five Zero [Member] Interest Rate Swap 1 - Two Point Two Seven Five Zero [Member] Interest Rate Swap - 2.275% Fixed Rate Interest Rate Swap 2 - Two Point Two Seven Five Zero [Member] Interest Rate Swap 2 - Two Point Two Seven Five Zero [Member] Interest Rate Swap - 2.7475% Fixed Rate Interest Rate Swap 27475% Due January 2024 [Member] Interest Rate Swap 27475% Due January 2024 [Member] Effective Date Derivative Effective Dates Effective date of the derivative contract, in CCYY-MM-DD format. Maturity Date Derivative, Maturity Date Pay Fixed Rate Derivative, Fixed Interest Rate Receive Floating Rate Index Derivative, Description of Terms Current Notional Amount Fair Value Interest Rate Derivatives, at Fair Value, Net Basis of Presentation and use of Estimates Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Recently Issued and Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Interim Financial Statements Interim Disclosure Policy [Policy Text Block] Disclosure of accounting policy for interim disclosure. Investments in Real Estate Real Estate, Policy [Policy Text Block] Long-Lived Assets - Held for Sale Assets Held For Sale Policy [Policy Text Block] Disclosure of accounting policy for assets held for sale. Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Consolidated VIEs Consolidation, Variable Interest Entity, Policy [Policy Text Block] Earnings per Share - Company/Earnings per Unit - Operating Partnership Earnings Per Share, Policy [Policy Text Block] Mortgages Fifth Amended And Restated Credit Agreement Fifth Amended And Restated Credit Agreement [Member] Fifth Amended And Restated Credit Agreement [Member] Credit Agreement Credit Agreement [Member] Credit Agreement [Member] Term Loan III Facility Term Loan III Facility [Member] Term Loan III Facility [Member] Term Loan I Facility Term Loan I Facility [Member] Term Loan I Facility [Member] Term Loan II Facility Term Loan II Facility [Member] Term Loan II Facility [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Debt Instrument [Line Items] Refinanced debt amount Short-term Debt, Refinanced, Amount Derivative, fixed interest rate Mortgage loans payable Other operating income Settlement of mortgage loan Repayments of fixed rate mortgage debt Number of fixed rate mortgage debt secured owned properties. Number Of Real Estate Properties, Collateralized Number Of Real Estate Properties, Collateralized Defeasance costs related to early extinguishment of debt Write off of deffered financing costs, premiums and discounts Write off of Deferred Debt Issuance Cost Stated percentage Yield (percent) Debt Instrument. Interest Rate, Effective Percentage, Including Interest Rate Swap Termination Effect Debt Instrument. Interest Rate, Effective Percentage, Including Interest Rate Swap Termination Effect Credit facility Line of Credit Facility, Maximum Borrowing Capacity Credit facility, additional borrowing capacity (up to) Line Of Credit Facility Additional Borrowing Capacity Amount of additional borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Line of credit, required unused commitment fee per annum (percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Weighted average annual interest rate (percent) Debt, Weighted Average Interest Rate Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Current borrowing capacity of credit facility Line of Credit Facility, Remaining Borrowing Capacity Repayments of unsecured debt Line of credit facility, accordion feature (up to) Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as hedging instrument Designated as Hedging Instrument [Member] Forward starting swap contracts Forward Contracts [Member] Other liabilities Other Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Asset Derivatives Derivative Instruments in Hedges, Assets, at Fair Value Liability Derivatives Derivative Instruments in Hedges, Liabilities, at Fair Value Acquisitions Business Combination Disclosure [Text Block] Numerator – basic and diluted earnings per share: Earnings Per Share [Abstract] Net loss (income) attributable to noncontrolling interests Net income attributable to common stockholders Amount allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Basic weighted average common shares outstanding (in shares) Unvested restricted stock awards (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Diluted weighted average common shares outstanding (in shares) Earnings per share: Net income attributable to common stockholders - basic and diluted (in dollars per share)