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

Organization (Details)

Organization (Details) - Mar. 31, 2019 ft² in Millions	Property	MW	ft²	a
Operating Properties
Investments in real estate
Number of real estate properties	165
Area of real estate property (in sq ft or acres) \| ft²			18.3
Operating Properties \| Office Properties
Investments in real estate
Number of real estate properties	146
Area of real estate property (in sq ft or acres) \| ft²			15.2
Operating Properties \| Single-tenant data centers
Investments in real estate
Number of real estate properties	19
Area of real estate property (in sq ft or acres) \| ft²			3.1
Properties under, or contractually committed for, construction or approved for redevelopment
Investments in real estate
Number of real estate properties	15
Area of real estate property (in sq ft or acres) \| ft²			2.0
Properties under, or contractually committed for, construction or approved for redevelopment \| Office Properties
Investments in real estate
Number of real estate properties	10
Properties under, or contractually committed for, construction or approved for redevelopment \| Single-tenant data centers
Investments in real estate
Number of real estate properties	5
Properties under, or contractually committed for, construction or approved for redevelopment \| Partially operational properties
Investments in real estate
Number of real estate properties	2
Land controlled for future development
Investments in real estate
Area of real estate property (in sq ft or acres)			11.6	900
Other Land
Investments in real estate
Area of real estate property (in sq ft or acres) \| a				150
Operating wholesale data center
Investments in real estate
Critical load (in megawatts) \| MW		19.25
GI-COPT \| Operating Properties \| Single-tenant data centers
Investments in real estate
Number of real estate properties	6