Debt Instrument. Interest Rate, Effective Percentage, Including Interest Rate Swap Termination Effect

No definition available.

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- Definition

Represents a period when debt instrument is scheduled to be fully repaid.

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No definition available.

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- Definition

Represents percentage of proceedings received as to par value, proceeding above the part value represents premium and below the par value signifies discount.

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Amount of additional borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Line of Credit Facility, Accordion Feature, Increase Limit

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- Definition

This element represents information pertaining to number of available beds.

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This element represents number of properties sold.

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Number of Bond Series Issued by Special Purpose Subsidiaries

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Number of On-campus Participating Properties Financed with Taxable Bonds

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Number of Presale Properties, Acquired

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Number of Special Purpose Subsidiaries Holding a Separate Leasehold Interest

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On-campus Participating Properties Financed with Taxable Bonds, Percentage of Financing

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount, after accumulated amortization, of debt discount.

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- Definition

Weighted average interest rate of debt outstanding.

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No definition available.

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- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

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No definition available.

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Fixed interest rate related to the interest rate derivative.

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No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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The cash inflow from borrowings supported by a written promise to pay an obligation that is uncollateralized (where debt is not backed by the pledge of collateral).

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The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Debt - Narrative (Details)	1 Months Ended					4 Months Ended	12 Months Ended
Debt - Narrative (Details)	Jul. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jan. 31, 2019 USD ($)	May 31, 2018 USD ($) Property	Jun. 30, 2017 USD ($)	Nov. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Subsidary Bed bond_series Property	Dec. 31, 2018 USD ($) Bed Property	Dec. 31, 2017 USD ($) Bed Property	Oct. 31, 2019 USD ($)	May 31, 2017 USD ($) Bed
Debt Instrument [Line Items]
Short-term Debt, Refinanced, Amount			$ 70,000,000.0
Pay Fixed Rate			4.00%
Number Of Available Beds \| Bed							112,800
Number of properties, under development \| Property							2
Secured mortgage, construction and bond debt, net							$ 787,426,000	$ 853,084,000
Provision for impairment							$ 17,214,000	0	$ 15,317,000
Number of properties \| Property							3
Percentage of financing							100.00%
Number of series of taxable bonds issued \| bond_series							3
Number of special purpose subsidiaries \| Subsidary							3
Gain from extinguishment of debt							$ 20,992,000	7,867,000	0
Repayments of Secured Debt							53,818,000	186,347,000	147,960,000
Proceeds from unsecured notes							$ 398,816,000	0	$ 399,648,000
Unsecured revolving credit facility \| Credit Agreement
Debt Instrument [Line Items]
Annual unused commitment fee (percent)							0.20%
Weighted average interest rate of debt (percent)							2.97%
Interest rate (percent)							1.77%
Weighted average interest rate spread (percent)							1.00%
Mortgage loans payable
Debt Instrument [Line Items]
Secured mortgage, construction and bond debt, net											$ 27,400,000
Provision for impairment					$ 15,300,000
Unsecured debt \| Unsecured revolving credit facility
Debt Instrument [Line Items]
Credit facility			$ 700,000,000				$ 1,000,000,000.0
Additional borrowing capacity of unsecured facility (up to)							$ 200,000,000
Annual unused commitment fee (percent)							0.20%
Revolving credit facility available							$ 574,300,000
Unsecured debt \| Unsecured revolving credit facility \| Term Loan I Facility
Debt Instrument [Line Items]
Pay-off of unsecured term loans				$ 150,000,000
Unsecured debt \| Unsecured revolving credit facility \| Term Loan III Facility
Debt Instrument [Line Items]
Pay-off of unsecured term loans				300,000,000
Write off of deferred debt issuance cost				$ 900,000
Unsecured debt \| Unsecured revolving credit facility \| Term Loan II Facility
Debt Instrument [Line Items]
Credit facility							$ 200,000,000
Weighted average interest rate of debt (percent)							2.54%
Interest rate (percent)							1.44%
Weighted average interest rate spread (percent)							1.10%
Line of credit facility, accordion feature, increase limit							$ 100,000,000
Owned Properties \| Mortgage loans payable
Debt Instrument [Line Items]
Secured mortgage, construction and bond debt, net							698,687,000	736,985,000
Unamortized debt discounts							199,000	$ 0
Owned Properties \| Construction Loans
Debt Instrument [Line Items]
Repayments of Secured Debt						$ 53,800,000
Disposal group, not discontinued operations \| Owned Properties
Debt Instrument [Line Items]
Number of properties sold \| Property				3
Blanton Common At Valdosta State University Property Disposition [Member]
Debt Instrument [Line Items]
Number Of Available Beds \| Bed											860
Blanton Common \| Mortgage loans payable
Debt Instrument [Line Items]
Gain from extinguishment of debt	$ 21,000,000.0
Owned Properties \| Disposal group, not discontinued operations
Debt Instrument [Line Items]
Number Of Available Beds \| Bed								1,338	657
Provision for impairment									$ 4,900,000
Number of properties sold \| Property								3	1
Interest Rate Swap \| Mortgage loans payable
Debt Instrument [Line Items]
Pay Fixed Rate										3.76%
Derivative, Amount of Hedged Item										$ 37,500,000
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP
Debt Instrument [Line Items]
Secured mortgage, construction and bond debt, net							787,426,000	$ 853,084,000
Provision for impairment							17,214,000	0	$ 15,317,000
Gain from extinguishment of debt							20,992,000	7,867,000	0
Repayments of Secured Debt							53,818,000	186,347,000	147,960,000
Proceeds from unsecured notes							$ 398,816,000	$ 0	$ 399,648,000
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP \| Senior Notes - June 2019
Debt Instrument [Line Items]
Interest rate (percent)		3.30%					3.30%
Debt Instrument, Face Amount		$ 400,000,000					$ 400,000,000
Term (Years)		7 years					7 years
Percentage of par value		99.704%					99.704%
Debt Instrument. Interest Rate, Effective Percentage, Including Interest Rate Swap Termination Effect		3.347%
Proceeds from unsecured notes		$ 394,000,000.0
ACC/Allianz Joint Venture Transaction \| Owned Properties \| Disposal group, not discontinued operations
Debt Instrument [Line Items]
Number Of Available Beds \| Bed								4,611
Number of properties sold \| Property				7				7