COPT Defense Properties Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- Cover Page
- Audit Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Interest Rate Derivatives - Schedule of Key Terms and Fair Values of Interest Rate Swap Derivatives (Details)

v3.25.0.1

Interest Rate Derivatives - Schedule of Key Terms and Fair Values of Interest Rate Swap Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fair values of interest rate swap derivatives
Fair value of interest rate swaps	$ 1,315	$ 2,558
Interest rate swap, effective February 1, 2023, swap one \| Designated
Fair values of interest rate swap derivatives
Notional Amount	$ 150,000
Fixed Rate	3.742%
Fair value of interest rate swaps	$ 550	681
Interest rate swap, effective February 1, 2023, swap two \| Designated
Fair values of interest rate swap derivatives
Notional Amount	$ 50,000
Fixed Rate	3.747%
Fair value of interest rate swaps	$ 181	222
Interest rate swap, effective April 1, 2020 \| Designated
Fair values of interest rate swap derivatives
Notional Amount	$ 22,175
Fixed Rate	0.573%
Floating Rate Index, over SOFR	0.10%
Fair value of interest rate swaps	$ 197	1,084
Notional amount of interest rate derivatives after scheduled amortization	22,100
Interest rate swap, effective August 1, 2019 \| Designated
Fair values of interest rate swap derivatives
Notional Amount	$ 10,400
Fixed Rate	1.678%
Floating Rate Index, over SOFR	0.10%
Fair value of interest rate swaps	$ 387	$ 571
Notional amount of interest rate derivatives after scheduled amortization	$ 10,000

- Definition

Represents the notional amount of interest rate derivatives after scheduled amortization.

+ References

No definition available.

+ Details

Name:	ofc_InterestRateCashFlowHedgeDerivativeNotionalAmountafterScheduledAmortization
Namespace Prefix:	ofc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

+ References

No definition available.

+ Details

Name:	us-gaap_InterestRateDerivativesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ofc_InterestRateSwapEffectiveFebruary20233747Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ofc_InterestRateSwapEffectiveApril20200.573Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ofc_InterestRateSwapEffectiveAugust12019Member
Namespace Prefix:
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Period Type: