COPT Defense Properties Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Information by Business Segment - Narrative (Details)

Information by Business Segment - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 property	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Segment financial information for real estate operations
Number of properties reclassified between segments \| property	2
Unconsolidated real estate joint ventures owning operating properties \| Defense/IT Portfolio \| Data Center Shells
Segment financial information for real estate operations
Carrying values of investments in UJVs owning operating properties, net of deficit investment balances \| $		$ 13.8	$ 36.4

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References + Details