COPT Defense Properties Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Debt, Net (Details)

Debt, Net (Details) - USD ($)		3 Months Ended		9 Months Ended
Debt, Net (Details) - USD ($)	Oct. 12, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt
Carrying Value		$ 1,873,836,000		$ 1,873,836,000		$ 2,077,752,000
Deferred financing costs, net		3,812,000		3,812,000		5,867,000
Interest costs capitalized		1,200,000	$ 1,500,000	4,300,000	$ 5,600,000
Loans payable
Debt
Deferred financing costs, net		6,900,000		6,900,000		8,000,000
Mortgage and Other Secured Loans:
Debt
Carrying Value		168,505,000		168,505,000		331,000,000
Fixed rate mortgage loans
Debt
Carrying Value		154,976,000		$ 154,976,000		281,208,000
Stated interest rates, low end of range (as a percent)				3.82%
Stated interest rates, high end of range (as a percent)				7.87%
Unamortized premium included in carrying value		$ 440,000		$ 440,000		514,000
Weighted average interest rate (as a percent)		4.20%		4.20%
Variable rate secured loans
Debt
Carrying Value		$ 13,529,000		$ 13,529,000		49,792,000
Description of variable rate basis				LIBOR
Stated interest rate (as a percent)		2.37%		2.37%
Variable rate secured loans \| London Interbank Offered Rate (LIBOR)
Debt
Variable rate, spread (as a percent)				1.85%
Revolving Credit Facility
Debt
Carrying Value		$ 0		$ 0		43,500,000
Description of variable rate basis				LIBOR
Revolving Credit Facility \| Minimum \| London Interbank Offered Rate (LIBOR)
Debt
Variable rate, spread (as a percent)				0.875%
Revolving Credit Facility \| Maximum \| London Interbank Offered Rate (LIBOR)
Debt
Variable rate, spread (as a percent)				1.60%
Term Loan Facilities
Debt
Carrying Value		$ 516,812,000		$ 516,812,000		515,902,000
Description of variable rate basis				LIBOR
Weighted average interest rate (as a percent)		2.17%		2.17%
Increase to maximum borrowing capacity		$ 150,000,000		$ 150,000,000
Aggregate additional borrowing capacity available		430,000,000		$ 430,000,000
Term Loan Facilities \| Minimum \| London Interbank Offered Rate (LIBOR)
Debt
Variable rate, spread (as a percent)				0.90%
Term Loan Facilities \| Maximum \| London Interbank Offered Rate (LIBOR)
Debt
Variable rate, spread (as a percent)				2.60%
Term Loan Facilities \| Subsequent Event
Debt
Repayments of term loan	$ 120,000,000
3.60% Senior Notes \| Unsecured senior notes
Debt
Carrying Value		347,024,000		$ 347,024,000		346,714,000
Debt instrument, face amount		$ 350,000		$ 350,000
Stated interest rate (as a percent)		3.60%		3.60%
Unamortized discount included in carrying value		$ 2,000,000		$ 2,000,000		2,200,000
Interest rate on debt (as a percent)		3.70%		3.70%
5.250% Senior Notes \| Unsecured senior notes
Debt
Carrying Value		$ 246,063,000		$ 246,063,000		245,731,000
Debt instrument, face amount		$ 250,000		$ 250,000
Stated interest rate (as a percent)		5.25%		5.25%
Unamortized discount included in carrying value		$ 3,500,000		$ 3,500,000		3,800,000
Interest rate on debt (as a percent)		5.49%		5.49%
3.70% Senior Notes \| Unsecured senior notes
Debt
Carrying Value		$ 297,725,000		$ 297,725,000		297,378,000
Debt instrument, face amount		$ 300,000		$ 300,000
Stated interest rate (as a percent)		3.70%		3.70%
Unamortized discount included in carrying value		$ 1,800,000		$ 1,800,000		2,100,000
Interest rate on debt (as a percent)		3.85%		3.85%
5.000% Senior Notes \| Unsecured senior notes
Debt
Carrying Value		$ 296,279,000		$ 296,279,000		296,019,000
Debt instrument, face amount		$ 300,000		$ 300,000
Stated interest rate (as a percent)		5.00%		5.00%
Unamortized discount included in carrying value		$ 3,100,000		$ 3,100,000		3,300,000
Interest rate on debt (as a percent)		5.15%		5.15%
Unsecured notes payable
Debt
Carrying Value		$ 1,428,000		$ 1,428,000		1,508,000
Stated interest rate (as a percent)		0.00%		0.00%
Unamortized discount included in carrying value		$ 483,000		$ 483,000		$ 554,000