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

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.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Term Loan Credit Facility, Accordion Feature

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

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

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- Definition

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

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-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
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- Definition

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.

+ References

No definition available.

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

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

+ References

No definition available.

+ Details

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Balance Type:	debit
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- Definition

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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- Definition

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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Debt - Narrative (Details)	1 Months Ended				3 Months Ended		6 Months Ended
Debt - Narrative (Details)	Jun. 30, 2020 USD ($) Property	Feb. 29, 2020 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) Property	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Property	Jun. 30, 2019 USD ($)	Feb. 28, 2019 USD ($)
Debt Instrument [Line Items]
Pay-off of mortgage loans							$ 34,219,000	$ 0
Number of properties \| Property	166				166		166
Refinanced debt amount				$ 70,000,000.0
Derivative, fixed interest rate				4.00%
Proceeds from unsecured notes							$ 795,808,000	398,816,000
Repayments of unsecured debt							400,000,000	0
Loss from early extinguishment of debt			$ 4,800,000		$ 0	$ 0	$ 4,827,000	0
Credit Agreement \| Unsecured revolving credit facility
Debt Instrument [Line Items]
Stated percentage	0.18%				0.18%		0.18%
Line of credit, required unused commitment fee per annum (percent)							0.20%
Weighted average annual interest rate (percent)	1.38%				1.38%		1.38%
Basis spread on variable rate							1.00%
Mortgage loans payable
Debt Instrument [Line Items]
Pay-off of mortgage loans		$ 34,200,000
Number of properties \| Property	1				1		1
Unsecured debt \| Unsecured revolving credit facility
Debt Instrument [Line Items]
Credit facility				$ 700,000,000					$ 1,000,000,000.0
Credit facility, additional borrowing capacity (up to)									$ 200,000,000
Line of credit, required unused commitment fee per annum (percent)							0.20%
Current borrowing capacity of credit facility	$ 813,500,000				$ 813,500,000		$ 813,500,000
Unsecured debt \| Unsecured term loans, net
Debt Instrument [Line Items]
Amount	$ 200,000,000				$ 200,000,000		$ 200,000,000
Stated percentage	1.44%				1.44%		1.44%
Weighted average annual interest rate (percent)	2.54%				2.54%		2.54%
Basis spread on variable rate							1.10%
Line of credit facility, accordion feature, increase limit	$ 100,000,000				$ 100,000,000		$ 100,000,000
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP
Debt Instrument [Line Items]
Pay-off of mortgage loans							34,219,000	0
Proceeds from unsecured notes							795,808,000	398,816,000
Repayments of unsecured debt							400,000,000	0
Loss from early extinguishment of debt					0	$ 0	4,827,000	$ 0
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP \| Senior Notes - June 2020
Debt Instrument [Line Items]
Amount	$ 400,000,000.0				$ 400,000,000.0		$ 400,000,000.0
Term (Years)	10 years
% of Par Value	99.142%						99.142%
Stated percentage	3.875%				3.875%		3.875%
Proceeds from unsecured notes	$ 391,700,000
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP \| Senior Notes - January 2020
Debt Instrument [Line Items]
Amount	$ 400,000,000		$ 400,000,000		$ 400,000,000		$ 400,000,000
Term (Years)			10 years
% of Par Value			99.81%				99.81%
Stated percentage	2.85%		2.85%		2.85%		2.85%
Proceeds from unsecured notes			$ 394,500,000
AMERICAN CAMPUS COMMUNITIES OPERATING PARTNERSHIP LP \| Senior notes - October 2020
Debt Instrument [Line Items]
Stated percentage			3.35%
Repayments of unsecured debt			$ 400,000,000