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

Annual report pursuant to Section 13 and 15(d)

Debt, Net - Schedule of Debt (Details)

Debt, Net - Schedule of Debt (Details)	12 Months Ended
Debt, Net - Schedule of Debt (Details)	Dec. 31, 2024 USD ($) extension	Dec. 31, 2023 USD ($)	Sep. 12, 2023 USD ($)	Dec. 31, 2021 USD ($)
Debt
Carrying Value	$ 2,391,755,000	$ 2,416,287,000
Revolving Credit Facility
Debt
Carrying Value	$ 75,000,000	75,000,000
Variable rate, additional spread	0.0010
Weighted average interest rate	5.70%
Revolving Credit Facility \| Minimum
Debt
Variable rate, spread over SOFR	0.725%
Revolving Credit Facility \| Maximum
Debt
Variable rate, spread over SOFR	1.40%
Term Loan Facility
Debt
Interest rate	5.95%
Carrying Value	$ 124,633,000	124,291,000		$ 300,000,000.0
Variable rate, additional spread	0.0010
Extension option period	12 months
Term Loan Facility \| Minimum
Debt
Variable rate, spread over SOFR	0.85%
Term Loan Facility \| Maximum
Debt
Variable rate, spread over SOFR	1.70%
Unsecured note payable
Debt
Interest rate	0.00%
Carrying Value	$ 251,000	430,000
Unamortized discounts and/or commissions included in carrying value	10,000	32,000
Mortgage and other secured debt
Debt
Carrying Value	69,601,000	99,208,000
Mortgage and other secured debt \| Fixed-rate mortgage debt
Debt
Carrying Value	$ 37,130,000	66,314,000
Mortgage and other secured debt \| Fixed-rate mortgage debt \| Minimum
Debt
Interest rate	3.82%
Mortgage and other secured debt \| Variable-rate secured debt
Debt
Carrying Value	$ 32,471,000	32,894,000
Variable rate, additional spread	0.0010
Weighted average interest rate	6.16%
Number of extensions \| extension	2
Extension option period	12 months
Extension fee percentage	0.10%
Mortgage and other secured debt \| Variable-rate secured debt \| Interest rate swaps
Debt
Weighted average interest rate	2.44%
Mortgage and other secured debt \| Variable-rate secured debt \| Minimum
Debt
Variable rate, spread over SOFR	1.45%
Mortgage and other secured debt \| Variable-rate secured debt \| Maximum
Debt
Variable rate, spread over SOFR	1.55%
Unsecured Senior Notes \| 2.25%, $400,000 aggregate principal
Debt
Interest rate	2.25%
Debt instrument, face amount	$ 400,000,000
Carrying Value	398,699,000	397,608,000
Unamortized discounts and/or commissions included in carrying value	$ 1,100,000	1,900,000
Effective interest rate on debt	2.48%
Unsecured Senior Notes \| 5.25%, $345,000 aggregate principal
Debt
Interest rate	5.25%		5.25%
Debt instrument, face amount	$ 345,000,000		$ 345,000,000
Carrying Value	337,588,000	335,802,000
Unamortized discounts and/or commissions included in carrying value	$ 6,600,000	8,100,000
Effective interest rate on debt	5.83%
Unsecured Senior Notes \| 2.00%, $400,000 aggregate principal
Debt
Interest rate	2.00%
Debt instrument, face amount	$ 400,000,000
Carrying Value	397,961,000	397,471,000
Unamortized discounts and/or commissions included in carrying value	$ 1,500,000	1,800,000
Effective interest rate on debt	2.09%
Unsecured Senior Notes \| 2.75%, $600,000 aggregate principal
Debt
Interest rate	2.75%
Debt instrument, face amount	$ 600,000,000
Carrying Value	592,330,000	591,212,000
Unamortized discounts and/or commissions included in carrying value	$ 6,700,000	7,600,000
Effective interest rate on debt	2.94%
Unsecured Senior Notes \| 2.90%, $400,000 aggregate principal
Debt
Interest rate	2.90%
Debt instrument, face amount	$ 400,000,000
Carrying Value	395,692,000	395,265,000
Unamortized discounts and/or commissions included in carrying value	$ 3,500,000	3,900,000
Effective interest rate on debt	3.01%
Loans Payable
Debt
Net deferred financing costs	$ 4,000,000.0	$ 5,300,000