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

Quarterly report [Sections 13 or 15(d)]

Construction Contract and Other Service Revenues - Construction Contracts and Other Service Revenues by Compensation Arrangement (Details)

Construction Contract and Other Service Revenues - Construction Contracts and Other Service Revenues by Compensation Arrangement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	$ 13,424	$ 8,485	$ 26,231	$ 31,202
Cost-plus fee
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	9,736	1,323	13,684	4,230
Firm fixed price
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	1,816	3,525	5,821	15,338
Guaranteed maximum price
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	1,595	3,310	5,817	10,764
Other
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	$ 277	$ 327	$ 909	$ 870

- 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.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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