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Information by Business Segment (Tables)

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

Schedule of Segment Financial Information for Reportable Segments

The table below presents segment financial information for our reportable segments (in thousands): 

			Defense/IT Portfolio
			Fort Meade/BW Corridor						Redstone Arsenal						NoVA Defense/IT						Lackland Air Force Base						Navy Support						Data Center Shells						Total Defense/IT Portfolio												Other						Total
Three Months Ended March 31, 2026
Revenues from real estate operations			$	87,533					$	20,645					$	24,816					$	18,354					$	8,992					$	14,665					$	175,005											$	19,591					$	194,596
Other segment items
Property operating expenses			(36,480)						(7,249)						(10,356)						(8,998)						(4,359)						(2,549)						(69,991)												(11,444)						(81,435)
UJV NOI allocable to COPT Defense			—						—						—						—						—						2,056						2,056												—						2,056
Total other segment items			(36,480)						(7,249)						(10,356)						(8,998)						(4,359)						(493)						(67,935)												(11,444)						(79,379)
NOI from real estate operations			$	51,053					$	13,396					$	14,460					$	9,356					$	4,633					$	14,172					$	107,070											$	8,147					$	115,217
Additions to long-lived assets			$	7,646					$	882					$	2,003					$	(56)					$	1,679					$	—					$	12,154											$	6,601					$	18,755
Transfers from non-operating properties			$	116					$	2,909					$	5					$	—					$	—					$	15,556					$	18,586											$	388					$	18,974
Segment assets at March 31, 2026			$	1,454,179					$	613,080					$	517,239					$	193,465					$	172,205					$	590,649					$	3,540,817											$	327,328					$	3,868,145
Three Months Ended March 31, 2025
Revenues from real estate operations			$	84,608					$	16,422					$	23,162					$	16,410					$	7,960					$	10,865					$	159,427											$	18,170					$	177,597
Other segment items
Property operating expenses			(31,930)						(6,294)						(10,089)						(8,999)						(4,166)						(1,853)						(63,331)												(8,709)						(72,040)
UJV NOI allocable to COPT Defense			—						—						—						—						—						1,889						1,889												—						1,889
Total other segment items			(31,930)						(6,294)						(10,089)						(8,999)						(4,166)						36						(61,442)												(8,709)						(70,151)
NOI from real estate operations			$	52,678					$	10,128					$	13,073					$	7,411					$	3,794					$	10,901					$	97,985											$	9,461					$	107,446
Additions to long-lived assets			$	8,093					$	3,248					$	2,556					$	119					$	3,666					$	—					$	17,682											$	1,733					$	19,415
Transfers from non-operating properties			$	1,337					$	4,266					$	18					$	—					$	—					$	3,941					$	9,562											$	2,774					$	12,336
Segment assets at March 31, 2025			$	1,441,470					$	601,935					$	492,384					$	197,349					$	163,951					$	490,998					$	3,388,087											$	314,871					$	3,702,958

Schedule of Reconciliation of Segment Revenues to Total Revenues

The table below reconciles our segment revenues to total revenues as reported on our consolidated statements of operations (in thousands):

			For the Three Months Ended March 31,
			2026						2025
Segment revenues from real estate operations			$	194,596					$	177,597
Construction contract and other service revenues			6,041						10,259
Total revenues			$	200,637					$	187,856

Schedule of Reconciliation of UJV NOI Allocable to COPT Defense to Equity in Income of Unconsolidated Entities

The table below reconciles UJV NOI allocable to COPT Defense to equity in income of unconsolidated entities as reported on our consolidated statements of operations (in thousands):

			For the Three Months Ended March 31,
			2026						2025
UJV NOI allocable to COPT Defense			$	2,056					$	1,889
Less: Income from UJV allocable to COPT Defense attributable to depreciation and amortization expense, interest expense, gain on sale of real estate, and loss on early extinguishment of debt			(650)						(1,518)
Equity in income of unconsolidated entities			$	1,406					$	371

Schedule of Computation of NOI from Service Operations

The table below presents the computation of our NOI from service operations (in thousands):

			For the Three Months Ended March 31,
			2026						2025
Construction contract and other service revenues			$	6,041					$	10,259
Construction contract and other service expenses			(5,552)						(9,705)
NOI from service operations			$	489					$	554

Schedule of Reconciliation of NOI from Real Estate Operations for Reportable Segments and NOI from Service Operations to Net Income

The table below reconciles our NOI from real estate operations for reportable segments and NOI from service operations to net income as reported on our consolidated statements of operations (in thousands):

			For the Three Months Ended March 31,
			2026						2025
NOI from real estate operations			$	115,217					$	107,446
NOI from service operations			489						554
Depreciation and other amortization associated with real estate operations			(42,685)						(39,359)
General, administrative, leasing, and other expenses			(12,649)						(12,156)
Interest expense			(23,996)						(20,504)
Interest and other income, net			3,955						1,568
Gain on sales of real estate			582						300
Equity in income of unconsolidated entities			1,406						371
UJV NOI allocable to COPT Defense included in equity in income of unconsolidated entities			(2,056)						(1,889)
Income tax expense			(124)						(103)
Net income			$	40,139					$	36,228

Schedule of Reconciliation of Segment Assets to Total Assets

The table below reconciles our segment assets to our consolidated total assets (in thousands):

						March 31, 2026						March 31, 2025
Segment assets						$	3,868,145					$	3,702,958
Operating properties lease liabilities included in segment assets						44,520						48,600
Investment in UJV deficit balance included in segment assets						24,013						3,895
Non-operating property assets						312,587						300,241
Other assets						209,644						194,617
Total consolidated assets						4,458,909						4,250,311

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