10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q 

(Mark one)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2023

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number 1-14023

CORPORATE OFFICE PROPERTIES TRUST

(Exact name of registrant as specified in its charter)

Maryland	23-2947217
(State or other jurisdiction of	(IRS Employer
incorporation or organization)	Identification No.)

6711 Columbia Gateway Drive, Suite 300, Columbia, MD	21046
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code:  (443) 285-5400

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Shares of beneficial interest, $0.01 par value	OFC	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ☒ Yes   ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). ☒ Yes   ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐ Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes   ☒ No

As of April 21, 2023, 112,513,857 of Corporate Office Properties Trust’s Common Shares of Beneficial Interest, $0.01 par value, were issued and outstanding.

TABLE OF CONTENTS

FORM 10-Q

		PAGE
PART I: FINANCIAL INFORMATION
Item 1:	Financial Statements
Consolidated Financial Statements
	Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022 (unaudited)	3
	Consolidated Statements of Operations for the Three Months Ended March 31, 2023 and 2022 (unaudited)	4
	Consolidated Statements of Comprehensive Income for the Three Months Ended March 31, 2023 and 2022 (unaudited)	5
	Consolidated Statements of Equity for the Three Months Ended March 31, 2023 and 2022 (unaudited)	6
	Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2023 and 2022 (unaudited)	7
Notes to Consolidated Financial Statements (unaudited)		9
Item 2:	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3:	Quantitative and Qualitative Disclosures About Market Risk	36
Item 4:	Controls and Procedures	37
PART II: OTHER INFORMATION
Item 1:	Legal Proceedings	37
Item 1A:	Risk Factors	37
Item 2:	Unregistered Sales of Equity Securities and Use of Proceeds	37
Item 3:	Defaults Upon Senior Securities	37
Item 4:	Mine Safety Disclosures	37
Item 5:	Other Information	37
Item 6:	Exhibits	38
SIGNATURES		39

2

PART I: FINANCIAL INFORMATION

Item 1. Financial Statements

Corporate Office Properties Trust and Subsidiaries

Consolidated Balance Sheets

(in thousands, except share data)

(unaudited)

	March 31, 2023		December 31, 2022
Assets
Properties, net:
Operating properties, net	$	3,272,873	$	3,258,899
Projects in development or held for future development	341,202		297,499
Total properties, net	3,614,075		3,556,398
Property - operating right-of-use assets	42,808		37,020
Assets held for sale, net	—		161,286
Cash and cash equivalents	15,199		12,337
Investment in unconsolidated real estate joint ventures	42,279		21,460
Accounts receivable, net	46,149		43,334
Deferred rent receivable	130,153		125,147
Lease incentives, net	49,679		49,757
Deferred leasing costs (net of accumulated amortization of $36,416 and $35,270, respectively)	68,930		69,339
Investing receivables (net of allowance for credit losses of $2,937 and $2,794, respectively)	85,499		84,621
Prepaid expenses and other assets, net	83,221		96,576
Total assets	$	4,177,992	$	4,257,275
Liabilities and equity
Liabilities:
Debt, net	$	2,123,012	$	2,231,794
Accounts payable and accrued expenses	128,509		157,998
Rents received in advance and security deposits	34,653		30,016
Dividends and distributions payable	32,630		31,400
Deferred revenue associated with operating leases	9,022		11,004
Property - operating lease liabilities	34,896		28,759
Other liabilities	21,008		18,556
Total liabilities	2,383,730		2,509,527
Commitments and contingencies (Note 17)
Redeemable noncontrolling interests	25,448		26,293
Equity:
Shareholders’ equity:
Common Shares of beneficial interest ($0.01 par value; 150,000,000 shares authorized; shares issued and outstanding of 112,513,857 at March 31, 2023 and 112,423,893 at December 31, 2022)	1,125		1,124
Additional paid-in capital	2,484,501		2,486,116
Cumulative distributions in excess of net income	(760,820)		(807,508)
Accumulated other comprehensive income	1,353		2,071
Total shareholders’ equity	1,726,159		1,681,803
Noncontrolling interests in subsidiaries:
Common units in Corporate Office Properties, L.P. (“COPLP”)	29,268		25,808
Other consolidated entities	13,387		13,844
Noncontrolling interests in subsidiaries	42,655		39,652
Total equity	1,768,814		1,721,455
Total liabilities, redeemable noncontrolling interests and equity	$	4,177,992	$	4,257,275

See accompanying notes to consolidated financial statements.

3

Corporate Office Properties Trust and Subsidiaries

Consolidated Statements of Operations

(in thousands, except per share data)

(unaudited)

	For the Three Months Ended March 31,
	2023		2022
Revenues
Lease revenue	$	150,560	$	141,389
Other property revenue	1,121		891
Construction contract and other service revenues	15,820		53,200
Total revenues	167,501		195,480
Operating expenses
Property operating expenses	59,420		57,181
Depreciation and amortization associated with real estate operations	36,995		34,264
Construction contract and other service expenses	15,201		51,650
General, administrative and leasing expenses	9,995		8,544
Business development expenses and land carry costs	495		783
Total operating expenses	122,106		152,422
Interest expense	(16,442)		(14,424)
Interest and other income	2,323		1,893
Credit loss (expense) recoveries	(67)		316
Gain on sales of real estate	49,378		15
Loss on early extinguishment of debt	—		(342)
Income from continuing operations before equity in (loss) income of unconsolidated entities and income taxes	80,587		30,516
Equity in (loss) income of unconsolidated entities	(64)		888
Income tax expense	(125)		(153)
Income from continuing operations	80,398		31,251
Discontinued operations	—		29,573
Net income	80,398		60,824
Net income attributable to noncontrolling interests:
Common units in COPLP	(1,293)		(856)
Other consolidated entities	(326)		(649)
Net income attributable to common shareholders	$	78,779	$	59,319
Basic earnings per common share: (1)
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.26
Net income attributable to common shareholders	$	0.70	$	0.53
Diluted earnings per common share: (1)
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.25
Net income attributable to common shareholders	$	0.70	$	0.52

(1) Basic and diluted earnings per common share are calculated based on amounts attributable to common shareholders.

See accompanying notes to consolidated financial statements.

4

Corporate Office Properties Trust and Subsidiaries

Consolidated Statements of Comprehensive Income

(in thousands)

(unaudited)

	For the Three Months Ended March 31,
	2023		2022
Net income	$	80,398	$	60,824
Other comprehensive (loss) income:
Unrealized (loss) income on interest rate derivatives	(215)		2,537
Reclassification adjustments on interest rate derivatives recognized in interest expense	(591)		1,003
Total other comprehensive (loss) income	(806)		3,540
Comprehensive income	79,592		64,364
Comprehensive income attributable to noncontrolling interests	(1,531)		(1,822)
Comprehensive income attributable to common shareholders	$	78,061	$	62,542

See accompanying notes to consolidated financial statements.

5

Corporate Office Properties Trust and Subsidiaries

Consolidated Statements of Equity

(Dollars in thousands)

(unaudited)

	Common Shares		Additional Paid-in Capital		Cumulative Distributions in Excess of Net Income		Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interests		Total
For the Three Months Ended March 31, 2022
Balance at December 31, 2021 (112,327,533 common shares outstanding)	$	1,123	$	2,481,539	$	(856,863)	$	(3,059)	$	34,335	$	1,657,075
Redemption of common units	—		—		—		—		(212)		(212)
Share-based compensation (91,278 shares issued, net of redemptions)	1		1,014		—		—		1,286		2,301
Redemption of vested equity awards	—		(1,059)		—		—		—		(1,059)
Adjustments to noncontrolling interests resulting from changes in ownership of COPLP	—		(2,414)		—		—		2,414		—
Comprehensive income	—		—		59,319		3,223		1,255		63,797
Dividends	—		—		(30,929)		—		—		(30,929)
Distributions to owners of common units in COPLP	—		—		—		—		(469)		(469)
Distributions to noncontrolling interests in other consolidated entities	—		—		—		—		(7)		(7)
Adjustments for changes in fair value of redeemable noncontrolling interests	—		39		—		—		—		39
Balance at March 31, 2022 (112,418,811 common shares outstanding)	$	1,124	$	2,479,119	$	(828,473)	$	164	$	38,602	$	1,690,536
For the Three Months Ended March 31, 2023
Balance at December 31, 2022 (112,423,893 common shares outstanding)	$	1,124	$	2,486,116	$	(807,508)	$	2,071	$	39,652	$	1,721,455
Redemption of common units	—		—		—		—		(373)		(373)
Share-based compensation (89,964 shares issued, net of redemptions)	1		1,059		—		—		754		1,814
Redemption of vested equity awards	—		(1,113)		—		—		—		(1,113)
Adjustments to noncontrolling interests resulting from changes in ownership of COPLP	—		(2,342)		—		—		2,342		—
Comprehensive income	—		—		78,779		(718)		832		78,893
Dividends	—		—		(32,091)		—		—		(32,091)
Distributions to owners of common units in COPLP	—		—		—		—		(544)		(544)
Distributions to noncontrolling interests in other consolidated entities	—		—		—		—		(8)		(8)
Adjustments for changes in fair value of redeemable noncontrolling interests	—		781		—		—		—		781
Balance at March 31, 2023 (112,513,857 common shares outstanding)	$	1,125	$	2,484,501	$	(760,820)	$	1,353	$	42,655	$	1,768,814

See accompanying notes to consolidated financial statements.

6

Corporate Office Properties Trust and Subsidiaries

Consolidated Statements of Cash Flows

(in thousands)

(unaudited) 

	For the Three Months Ended March 31,
	2023		2022
Cash flows from operating activities
Revenues from real estate operations received	$	152,273	$	133,550
Construction contract and other service revenues received	18,765		49,436
Property operating expenses paid	(55,753)		(56,132)
Construction contract and other service expenses paid	(21,999)		(47,380)
General, administrative, leasing, business development and land carry costs paid	(11,681)		(13,196)
Interest expense paid	(12,031)		(9,949)
Lease incentives paid	(10,350)		(5,677)
Other	(479)		2,059
Net cash provided by operating activities	58,745		52,711
Cash flows from investing activities
Development and redevelopment of properties	(71,282)		(91,783)
Tenant improvements on operating properties	(22,568)		(7,989)
Other capital improvements on operating properties	(5,512)		(14,529)
Proceeds from sale of properties	189,325		220,814
Leasing costs paid	(4,655)		(2,103)
Other	(125)		(190)
Net cash provided by investing activities	85,183		104,220
Cash flows from financing activities
Proceeds from debt
Revolving Credit Facility	95,000		244,000
Repayments of debt
Revolving Credit Facility	(188,000)		(160,000)
Term loan facility	—		(200,000)
Scheduled principal amortization	(790)		(774)
Other debt repayments	(15,902)		—
Common share dividends paid	(30,941)		(30,904)
Other	(2,900)		(2,725)
Net cash used in financing activities	(143,533)		(150,403)
Net increase in cash and cash equivalents and restricted cash	395		6,528
Cash and cash equivalents and restricted cash
Beginning of period	16,509		17,316
End of period	$	16,904	$	23,844

See accompanying notes to consolidated financial statements.

7

Corporate Office Properties Trust and Subsidiaries

Consolidated Statements of Cash Flows (continued)

(in thousands)

(unaudited)

	For the Three Months Ended March 31,
	2023		2022
Reconciliation of net income to net cash provided by operating activities:
Net income	$	80,398	$	60,824
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and other amortization	37,597		34,871
Amortization of deferred financing costs and net debt discounts	1,250		1,202
Increase in deferred rent receivable	(6,869)		(5,822)
Gain on sales of real estate	(49,378)		(28,579)
Share-based compensation	1,733		2,111
Other	(376)		(1,021)
Changes in operating assets and liabilities:
Increase in accounts receivable	(2,802)		(1,994)
Decrease in lease incentives and prepaid expenses and other assets, net	9,361		1,585
Decrease in accounts payable, accrued expenses and other liabilities	(16,806)		(7,286)
Increase (decrease) in rents received in advance and security deposits	4,637		(3,180)
Net cash provided by operating activities	$	58,745	$	52,711
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents at beginning of period	$	12,337	$	13,262
Restricted cash at beginning of period	4,172		4,054
Cash and cash equivalents and restricted cash at beginning of period	$	16,509	$	17,316
Cash and cash equivalents at end of period	$	15,199	$	19,347
Restricted cash at end of period	1,705		4,497
Cash and cash equivalents and restricted cash at end of period	$	16,904	$	23,844
Supplemental schedule of non-cash investing and financing activities:
Decrease in accrued capital improvements, leasing and other investing activity costs	$	(11,043)	$	(33,733)
Recognition of operating right-of-use assets and related lease liabilities	$	6,697	$	683
Recognition of finance right-of-use assets and related lease liabilities	$	434	$	—
Investment in unconsolidated real estate joint venture retained in property disposition	$	21,121	$	—
(Decrease) increase in fair value of derivatives applied to accumulated other comprehensive income and noncontrolling interests	$	(806)	$	3,478
Dividends/distributions payable	$	32,630	$	31,402
Adjustments to noncontrolling interests resulting from changes in COPLP ownership	$	2,342	$	2,414
Decrease in redeemable noncontrolling interests and increase in equity to adjust for changes in fair value of redeemable noncontrolling interests	$	(781)	$	(39)

See accompanying notes to consolidated financial statements.

8

Corporate Office Properties Trust and Subsidiaries

Notes to Consolidated Financial Statements

(unaudited)

1.    Organization

Corporate Office Properties Trust (“COPT”) and subsidiaries (collectively, the “Company”, “we” or “us”) is a fully-integrated and self-managed real estate investment trust (“REIT”). We own, manage, lease, develop and selectively acquire office and data center properties. The majority of our portfolio is in locations that support the United States Government (“USG”) and its contractors, most of whom are engaged in national security, defense and information technology (“IT”) related activities servicing what we believe are growing, durable, priority missions (“Defense/IT Locations”). We also own a portfolio of office properties located in select urban submarkets in the Greater Washington, DC/Baltimore region with durable Class-A office fundamentals and characteristics (“Regional Office”). As of March 31, 2023, our properties included the following:

•194 properties totaling 23.0 million square feet comprised of 17.7 million square feet in 166 office properties and 5.3 million square feet in 28 single-tenant data center shells. We owned 24 of these data center shells through unconsolidated real estate joint ventures;

•nine properties under development (five office properties and four data center shells), including one partially-operational property, that we estimate will total approximately 1.5 million square feet upon completion; and

•approximately 680 acres of land controlled for future development that we believe could be developed into approximately 9.0 million square feet and approximately 40 acres of other land.

We conduct almost all of our operations and own almost all of our assets through our operating partnership, Corporate Office Properties, L.P. (“COPLP”) and subsidiaries (collectively, the “Operating Partnership”), of which COPT is the sole general partner. COPLP owns real estate directly and through subsidiary partnerships and limited liability companies (“LLCs”).  In addition to owning real estate, COPLP also owns subsidiaries that provide real estate services such as property management, development and construction services primarily for our properties but also for third parties. Some of these services are performed by a taxable REIT subsidiary (“TRS”).

Equity interests in COPLP are in the form of common and preferred units. As of March 31, 2023, COPT owned 97.9% of the outstanding COPLP common units (“common units”) and there were no preferred units outstanding. Common units not owned by COPT carry certain redemption rights. The number of common units owned by COPT is equivalent to the number of outstanding common shares of beneficial interest (“common shares”) of COPT, and the entitlement of common units to quarterly distributions and payments in liquidation is substantially the same as that of COPT common shareholders.

COPT’s common shares are publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “OFC”.

2.    Summary of Significant Accounting Policies

Basis of Presentation

These consolidated financial statements include the accounts of COPT, the Operating Partnership, their subsidiaries and other entities in which COPT has a majority voting interest and control.  We also consolidate certain entities when control of such entities can be achieved through means other than voting rights (“variable interest entities” or “VIEs”) if we are deemed to be the primary beneficiary of such entities.  We eliminate all intercompany balances and transactions in consolidation.

We use the equity method of accounting when we own an interest in an entity and can exert significant influence over but cannot control the entity’s operations. We discontinue equity method accounting if our investment in an entity (and net advances) is reduced to zero unless we have guaranteed obligations of the entity or are otherwise committed to provide further financial support for the entity.

When we own an equity investment in an entity and cannot exert significant influence over its operations, we measure the investment at fair value, with changes recognized through net income. For an investment without a readily determinable fair value, we measure the investment at cost, less any impairments, plus or minus changes resulting from observable price changes for an identical or similar investment of the same issuer.

These interim financial statements should be read together with the consolidated financial statements and notes thereto as of and for the year ended December 31, 2022 included in our 2022 Annual Report on Form 10-K.  The unaudited consolidated financial statements include all adjustments that are necessary, in the opinion of management, to fairly state our financial position and results of operations.  All adjustments are of a normal recurring nature.  The consolidated financial statements have been prepared using the accounting policies described in our 2022 Annual Report on Form 10-K.

9

Reclassifications

We reclassified certain amounts from prior periods to conform to the current period presentation of our consolidated financial statements with no effect on previously reported net income or equity.

3.     Fair Value Measurements

Recurring Fair Value Measurements

We have a non-qualified elective deferred compensation plan for Trustees and certain members of our management team that, prior to December 31, 2019, permitted participants to defer up to 100% of their compensation on a pre-tax basis and receive a tax-deferred return on such deferrals. Effective December 31, 2019, no new investments of deferred compensation were eligible for the plan.  The assets held in the plan (comprised primarily of mutual funds and equity securities) and the corresponding liability to the participants are measured at fair value on a recurring basis on our consolidated balance sheets using quoted market prices, as are other marketable securities that we hold. The balance of the plan, which was fully funded and totaled $1.9 million as of March 31, 2023, is included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheets along with an insignificant amount of other marketable securities. The offsetting liability associated with the plan is adjusted to fair value at the end of each accounting period based on the fair value of the plan assets and reported in “other liabilities” on our consolidated balance sheets. The assets of the plan are classified in Level 1 of the fair value hierarchy, while the offsetting liability is classified in Level 2 of the fair value hierarchy.

The fair values of our interest rate derivatives, as disclosed in Note 9, are determined using widely accepted valuation techniques, including a discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate market data and implied volatilities in such interest rates. While we determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our interest rate derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default. However, as of March 31, 2023, we assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivatives and determined that these adjustments were not significant. As a result, we determined that our interest rate derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

The carrying values of cash and cash equivalents, restricted cash, accounts receivable, other assets (excluding investing receivables) and accounts payable and accrued expenses are reasonable estimates of their fair values because of the short maturities of these instruments.  The fair values of our investing receivables, as disclosed in Note 7, were based on the discounted estimated future cash flows of the loans (categorized within Level 3 of the fair value hierarchy); the discount rates used approximate current market rates for loans with similar maturities and credit quality, and the estimated cash payments include scheduled principal and interest payments.  For our disclosure of debt fair values in Note 8, we estimated the fair value of our unsecured senior notes based on quoted market rates for our senior notes (categorized within Level 1 of the fair value hierarchy) and estimated the fair value of our other debt based on the discounted estimated future cash payments to be made on such debt (categorized within Level 3 of the fair value hierarchy); the discount rates used approximate current market rates for loans, or groups of loans, with similar maturities and credit quality, and the estimated future payments include scheduled principal and interest payments.  Fair value estimates are made as of a specific point in time, are subjective in nature and involve uncertainties and matters of significant judgment. 

The table below sets forth our financial assets and liabilities accounted for at fair value on a recurring basis as of March 31, 2023 and the hierarchy level of inputs used in measuring their respective fair values under applicable accounting standards (in thousands):

Description	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable  Inputs (Level 3)		Total
Assets: (1)
Marketable securities in deferred compensation plan
Mutual funds	$	1,831	$	—	$	—	$	1,831
Other	44		—		—		44
Interest rate derivatives	—		2,179		—		2,179
Total assets	$	1,875	$	2,179	$	—	$	4,054
Liabilities: (2)
Deferred compensation plan liability	$	—	$	1,875	$	—	$	1,875
Interest rate derivatives	—		355		—		355
Total liabilities	$	—	$	2,230	$	—	$	2,230

(1)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

(2)Included in the line entitled “other liabilities” on our consolidated balance sheet.

10

4.    Properties, Net

Operating properties, net consisted of the following (in thousands): 

	March 31, 2023		December 31, 2022
Land	$	540,037	$	539,809
Buildings and improvements	4,033,266		3,986,524
Less: Accumulated depreciation	(1,300,430)		(1,267,434)
Operating properties, net	$	3,272,873	$	3,258,899

2023 Dispositions

On January 10, 2023, we sold a 90% interest in three data center shell properties in Northern Virginia based on an aggregate property value of $211.3 million and retained a 10% interest in the properties through Redshift JV LLC, a newly-formed joint venture. Our partner in the joint venture acquired the 90% interest from us for $190.2 million. We account for our interest in the joint venture using the equity method of accounting, as described further in Note 6. We recognized a gain on sale of $49.4 million. The table below sets forth the components of the properties’ assets, which were classified as held for sale on our consolidated balance sheet as of December 31, 2022 (in thousands):

Properties, net	$	156,691
Deferred rent receivable	4,595
Assets held for sale, net	$	161,286

5.    Leases

Lessor Arrangements

We lease real estate properties, comprised primarily of office properties and data center shells, to third parties. These leases encompass all, or a portion, of properties, with various expiration dates. Our lease revenue is comprised of: fixed lease revenue, including contractual rent billings under leases recognized on a straight-line basis over lease terms and amortization of lease incentives and above- and below- market lease intangibles; and variable lease revenue, including tenant expense recoveries, lease termination revenue and other revenue from tenants that is not fixed under leases. The table below sets forth our composition of lease revenue recognized between fixed and variable lease revenue (in thousands):

	For the Three Months Ended March 31,
Lease revenue (1)	2023		2022
Fixed	$	116,039	$	111,167
Variable	34,521		30,222
	$	150,560	$	141,389

(1)Excludes lease revenue from discontinued operations of which $1.5 million was fixed and $527,000 was variable for the three months ended March 31, 2022.

Fixed contractual payments due under our property leases were as follows (in thousands):

	As of March 31, 2023
Year Ending December 31,	Operating leases		Sales-type leases
2023 (1)	$	329,700	$	720
2024	415,499		960
2025	332,260		960
2026	263,741		960
2027	228,712		960
Thereafter	1,023,570		2,596
Total contractual payments	$	2,593,482	7,156
Less: Amount representing interest			(1,628)
Net investment in sales-type leases (2)			$	5,528

(1)Represents the nine months ending December 31, 2023.

(2)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

11

Lessee Arrangements

As of March 31, 2023, our balance sheet included $45.4 million in right-of-use assets associated primarily with land leased from third parties underlying certain properties that we are operating with various expiration dates. Our property right-of-use assets and property lease liabilities on our consolidated balance sheets consisted of the following (in thousands):

Leases	Balance Sheet Location	March 31, 2023		December 31, 2022
Right-of-use assets
Operating leases - Property	Property - operating right-of-use assets	$	42,808	$	37,020
Finance leases - Property	Prepaid expenses and other assets, net	2,621		2,207
Total right-of-use assets		$	45,429	$	39,227
Lease liabilities
Operating leases - Property	Property - operating lease liabilities	$	34,896	$	28,759
Finance leases - Property	Other liabilities	431		—
Total lease liabilities		$	35,327	$	28,759

As of March 31, 2023, our operating leases had a weighted average remaining lease term of 45 years and a weighted average discount rate of 7.34%, while our finance leases had a weighted average remaining lease term of ten years and a weighted average discount rate of 9.14%. The table below presents our total property lease costs (in thousands):

	Statement of Operations Location	For the Three Months Ended March 31,
Lease cost		2023		2022
Operating lease cost
Property leases - fixed	Property operating expenses	$	1,535	$	1,019
Property leases - variable	Property operating expenses	17		16
Finance lease cost
Amortization of property right-of-use assets	Property operating expenses	20		8
Interest on lease liabilities	Interest expense	13		—
		$	1,585	$	1,043

The table below presents the effect of property lease payments on our consolidated statements of cash flows (in thousands):

	For the Three Months Ended March 31,
Supplemental cash flow information	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,185	$	837
Operating cash flows for financing leases	$	13	$	—
Financing cash flows for financing leases	$	4	$	—

Payments on property leases were due as follows (in thousands):

	March 31, 2023
Year Ending December 31,	Operating Leases		Finance Leases
2023 (1)	$	4,863	$	45
2024	6,623		61
2025	2,249		63
2026	1,662		65
2027	1,677		67
Thereafter	130,495		365
Total lease payments	147,569		666
Less: Amount representing interest	(112,673)		(235)
Lease liability	$	34,896	$	431

(1)Represents the nine months ending December 31, 2023.

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6.    Real Estate Joint Ventures

Consolidated Real Estate Joint Ventures

The table below sets forth information as of March 31, 2023 pertaining to our investments in consolidated real estate joint ventures, which are each variable interest entities (dollars in thousands):

		Nominal Ownership %		March 31, 2023 (1)
	Date Acquired			Total Assets		Encumbered Assets		Total Liabilities		Mortgage Debt
Entity			Location
LW Redstone Company, LLC (2)	3/23/2010	85%	Huntsville, Alabama	$	633,045	$	94,288	$	114,695	$	51,659
Stevens Investors, LLC	8/11/2015	95%	Washington, DC	168,445		—		2,379		—
M Square Associates, LLC	6/26/2007	50%	College Park, Maryland	101,534		58,856		51,545		49,507
				$	903,024	$	153,144	$	168,619	$	101,166

(1)Excludes amounts eliminated in consolidation.

(2)We fund all capital requirements. Our partner receives distributions of the first $1.2 million of annual operating cash flows and we receive the remainder.

Unconsolidated Real Estate Joint Ventures

The table below sets forth information pertaining to our investments in unconsolidated real estate joint ventures accounted for using the equity method of accounting (dollars in thousands):

	Date Acquired	Nominal Ownership %	Number of Properties	Carrying Value of Investment (1)
Entity				March 31, 2023		December 31, 2022
Redshift JV LLC	1/10/2023	10%	3	$	21,181	$	—
BREIT COPT DC JV LLC	6/20/2019	10%	9	11,331		11,568
Quark JV LLC	12/14/2022	10%	2	6,761		6,758
B RE COPT DC JV III LLC	6/2/2021	10%	2	3,006		3,134
B RE COPT DC JV II LLC (2)	10/30/2020	10%	8	(1,803)		(1,459)
			24	$	40,476	$	20,001

(1)Included $42.3 million and $21.5 million reported in “Investment in unconsolidated real estate joint ventures” as of March 31, 2023 and December 31, 2022, respectively, and $1.8 million and $1.5 million for investments with deficit balances reported in “other liabilities” on our consolidated balance sheets as of March 31, 2023 and December 31, 2022, respectively.

(2)Our investment in B RE COPT DC JV II LLC was lower than our share of the joint venture’s equity by $7.0 million as of March 31, 2023 and December 31, 2022 due to a difference between our cost basis and our share of the joint venture’s underlying equity in its net assets. We recognize adjustments to our share of the joint venture’s earnings and losses resulting from this basis difference in the underlying assets of the joint venture.

As described further in Note 4, on January 10, 2023, we sold a 90% interest in three data center shell properties in Northern Virginia and retained a 10% interest in the properties through Redshift JV LLC, a newly-formed joint venture. We concluded that the joint venture is a variable interest entity. Under the terms of the joint venture agreement, we and our partner receive returns in proportion to our investments, and our maximum exposure to losses is limited to our investment, subject to certain indemnification obligations with respect to nonrecourse debt secured by the properties. The nature of our involvement in the activities of the joint venture does not give us power over decisions that significantly affect its economic performance.

7.    Investing Receivables

Investing receivables consisted of the following (in thousands): 

	March 31, 2023		December 31, 2022
Notes receivable from the City of Huntsville	$	70,592	$	69,703
Other investing loans receivable	17,844		17,712
Amortized cost basis	88,436		87,415
Allowance for credit losses	(2,937)		(2,794)
Investing receivables, net	$	85,499	$	84,621

The balances above include accrued interest receivable, net of allowance for credit losses, of $750,000 as of March 31, 2023 and $2.9 million as of December 31, 2022.

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Our notes receivable from the City of Huntsville funded infrastructure costs in connection with our LW Redstone Company, LLC joint venture (see Note 6) and carry an interest rate of 9.95%. Our other investing loans receivable as of March 31, 2023 carry interest rates ranging from 12.0% to 14.0% and mature within one year.

The fair value of these receivables was approximately $89 million as of March 31, 2023 and $87 million as of December 31, 2022.

8.    Debt, Net

Our debt consisted of the following (dollars in thousands):

	Carrying Value (1) as of				March 31, 2023
	March 31, 2023		December 31, 2022
					Stated Interest Rates	Scheduled Maturity
Mortgage and Other Secured Debt:
Fixed rate mortgage debt	$	67,954	$	84,433	3.82% to 4.62% (2)	2024-2026
Variable rate secured debt	33,212		33,318		SOFR + 0.10% + 1.45% to 1.55% (3)	2025-2026
Total mortgage and other secured debt	101,166		117,751
Revolving Credit Facility	118,000		211,000		SOFR + 0.10% + 0.725% to 1.400% (4)	October 2026 (5)
Term Loan Facility	124,034		123,948		SOFR + 0.10% + 0.850% to 1.700% (6)	January 2026 (7)
Unsecured Senior Notes
2.25%, $400,000 aggregate principal	396,805		396,539		2.25% (8)	March 2026
2.00%, $400,000 aggregate principal	397,108		396,988		2.00% (9)	January 2029
2.75%, $600,000 aggregate principal	590,392		590,123		2.75% (10)	April 2031
2.90%, $400,000 aggregate principal	394,951		394,848		2.90% (11)	December 2033
Unsecured note payable	556		597		0% (12)	May 2026
Total debt, net	$	2,123,012	$	2,231,794

(1)The carrying values of our debt other than the Revolving Credit Facility reflect net deferred financing costs of $5.1 million as of March 31, 2023 and $5.4 million as of December 31, 2022.

(2)The weighted average interest rate on our fixed rate mortgage debt was 4.10% as of March 31, 2023.

(3)The weighted average interest rate on our variable rate secured debt as of March 31, 2023 was 6.20%, or 2.45% including the effect of interest rate swaps that hedge the risk of interest rate changes on this debt.

(4)The weighted average interest rate on the Revolving Credit Facility was 5.84% as of March 31, 2023.

(5)The facility matures in October 2026, with the ability for us to extend such maturity by two six-month periods at our option, provided that there is no default under the facility and we pay an extension fee of 0.0625% of the total availability under the facility for each extension period.

(6)The interest rate on this loan was 6.07% as of March 31, 2023.

(7)This facility matures in January 2026, with the ability for us to extend such maturity by two 12-month periods at our option, provided that there is no default under the facility and we pay an extension fee of 0.125% of the outstanding loan balance for each extension period.

(8)The carrying value of these notes reflects an unamortized discount totaling $2.6 million as of March 31, 2023 and $2.8 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.48%.

(9)The carrying value of these notes reflects an unamortized discount totaling $2.1 million as of March 31, 2023 and December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.09%.

(10)The carrying value of these notes reflects an unamortized discount totaling $8.3 million as of March 31, 2023 and $8.5 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.94%.

(11)The carrying value of these notes reflects an unamortized discount totaling $4.1 million as of March 31, 2023 and $4.2 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 3.01%.

(12)This note carries an interest rate that, upon assumption, was below market rates and it therefore was recorded at its fair value based on applicable effective interest rates.  The carrying value of this note reflects an unamortized discount totaling $55,000 as of March 31, 2023 and $65,000 as of December 31, 2022.

All debt is owed by the Operating Partnership. While COPT is not directly obligated by any debt, it has guaranteed COPLP’s Revolving Credit Facility, Term Loan Facility and Unsecured Senior Notes.

Certain of our debt instruments require that we comply with a number of restrictive financial covenants.  As of March 31, 2023, we were compliant with these financial covenants.

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Our debt matures on the following schedule (in thousands):

Year Ending December 31,	March 31, 2023
2023 (1)	$	2,262
2024	29,983
2025	23,717
2026	689,300
2027	—
Thereafter	1,400,000
Total	$	2,145,262	(2)

(1)Represents the nine months ending December 31, 2023.

(2)Represents scheduled principal amortization and maturities only and therefore excludes net discounts and deferred financing costs of $22.3 million.

We capitalized interest costs of $770,000 in the three months ended March 31, 2023 and $1.5 million in the three months ended March 31, 2022.

The following table sets forth information pertaining to the fair value of our debt (in thousands): 

	March 31, 2023				December 31, 2022
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Fixed-rate debt
Unsecured Senior Notes	$	1,779,256	$	1,436,838	$	1,778,498	$	1,433,561
Other fixed-rate debt	68,510		64,120		85,030		80,330
Variable-rate debt	275,246		274,551		368,266		367,896
	$	2,123,012	$	1,775,509	$	2,231,794	$	1,881,787

9.    Interest Rate Derivatives

The following table sets forth the key terms and fair values of our interest rate swap derivatives (dollars in thousands):

							Fair Value at
Notional Amount			Fixed Rate	Floating Rate Index	Effective Date	Expiration Date	March 31, 2023		December 31, 2022
$	10,820	(1)	1.678%	SOFR + 0.10%	8/1/2019	8/1/2026	$	654	$	806
$	22,700	(2)	0.573%	SOFR + 0.10%	4/1/2020	3/26/2025	1,525		1,825
$	150,000		3.742%	One-Month SOFR	2/1/2023	2/2/2026	(262)		—
$	50,000		3.747%	One-Month SOFR	2/1/2023	2/2/2026	(93)		—
							$	1,824	$	2,631

(1)The notional amount of this instrument is scheduled to amortize to $10.0 million.

(2)The notional amount of this instrument is scheduled to amortize to $22.1 million.

Each of these swaps was designated as a cash flow hedge of interest rate risk.

The table below sets forth the fair value of our interest rate derivatives as well as their classification on our consolidated balance sheets (in thousands):

		Fair Value at
Derivatives	Balance Sheet Location	March 31, 2023		December 31, 2022
Interest rate swaps designated as cash flow hedges	Prepaid expenses and other assets, net	$	2,179	$	2,631
Interest rate swaps designated as cash flow hedges	Other liabilities	$	(355)	$	—

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The table below presents the effect of our interest rate derivatives on our consolidated statements of operations and comprehensive income (in thousands):

	Amount of (Loss) Income Recognized in AOCI on Derivatives				Amount of Income (Loss) Reclassified from AOCI into Interest Expense on Statement of Operations
Derivatives in Hedging Relationships	For the Three Months Ended March 31,				For the Three Months Ended March 31,
	2023		2022		2023		2022
Interest rate derivatives	$	(215)	$	2,537	$	591	$	(1,003)

Based on the fair value of our derivatives as of March 31, 2023, we estimate that approximately $2.9 million of gains will be reclassified from accumulated other comprehensive income (“ AOCI”) as a decrease to interest expense over the next 12 months.

We have agreements with each of our interest rate derivative counterparties that contain provisions under which, if we default or are capable of being declared in default on defined levels of our indebtedness, we could also be declared in default on our derivative obligations. Failure to comply with the loan covenant provisions could result in our being declared in default on any derivative instrument obligations covered by the agreements. As of March 31, 2023, we were not in default with any of these provisions. As of March 31, 2023, the fair value of interest rate derivatives in a net liability position related to these agreements was $219,000, including accrued interest and excluding credit valuation adjustments, and we had not posted any collateral related to these agreements; if we breach any of these provisions, we could be required to settle our obligations under these agreements for this amount. 

10.    Redeemable Noncontrolling Interests

Our partners in two real estate joint ventures, LW Redstone Company, LLC and Stevens Investors, LLC, have the right to require us to acquire their respective interests at fair value; accordingly, we classify our partners’ interests as redeemable noncontrolling interests in the mezzanine section of our consolidated balance sheets. The table below sets forth the activity for these redeemable noncontrolling interests (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	26,293	$	26,898
Distributions to noncontrolling interests	(763)		(606)
Net income attributable to noncontrolling interests	699		567
Adjustments for changes in fair value of interests	(781)		(39)
Ending balance	$	25,448	$	26,820

We determine the fair value of the interests based on unobservable inputs after considering the assumptions that market participants would make in pricing the interest. We apply a discount rate to the estimated future cash flows allocable to our partners from the properties underlying the respective joint ventures. Estimated cash flows used in such analyses are based on our plans for the properties and our views of market and economic conditions, and consider items such as current and future rental rates, occupancy projections and estimated operating and development expenditures.

11.    Equity

As of March 31, 2023, we had remaining capacity under our at-the-market stock offering program equal to an aggregate gross sales price of $300 million in common shares.

We declared dividends per common share of $0.285 in the three months ended March 31, 2023 and $0.275 in the three months ended March 31, 2022.

See Note 15 for disclosure of common share activity pertaining to our share-based compensation plans.

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12.    Information by Business Segment

We have the following reportable segments: Defense/IT Locations; Regional Office; Wholesale Data Center (the only property in which we sold on January 25, 2022); and Other. We also report on Defense/IT Locations sub-segments, which include the following: Fort George G. Meade and the Baltimore/Washington Corridor (“Fort Meade/BW Corridor”); Northern Virginia Defense/IT Locations (“NoVA Defense/IT”); Lackland Air Force Base (in San Antonio); locations serving the U.S. Navy (“Navy Support”), which included properties proximate to the Washington Navy Yard, the Naval Air Station Patuxent River in Maryland and the Naval Surface Warfare Center Dahlgren Division in Virginia; Redstone Arsenal (in Huntsville); and data center shells (properties leased to tenants to be operated as data centers in which the tenants fund the costs for the power, fiber connectivity and data center infrastructure).

We measure the performance of our segments through the measure we define as net operating income from real estate operations (“NOI from real estate operations”), which includes: real estate revenues and property operating expenses; and the net of revenues and property operating expenses of real estate operations owned through unconsolidated real estate joint ventures (“UJVs”) that is allocable to our ownership interest (“UJV NOI allocable to COPT”). Amounts reported for segment assets represent long-lived assets associated with consolidated operating properties (including the carrying value of properties, right-of-use assets, net of related lease liabilities, intangible assets, deferred leasing costs, deferred rents receivable and lease incentives) and the carrying value of investments in UJVs owning operating properties. Amounts reported as additions to long-lived assets represent additions to existing consolidated operating properties, excluding transfers from non-operating properties, which we report separately.

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

	Defense/IT Locations
	Fort Meade/BW Corridor		NoVA Defense/IT		Lackland Air Force Base		Navy Support		Redstone Arsenal		Data Center Shells		Total Defense/IT Locations		Regional Office		Wholesale Data Center		Other		Total
Three Months Ended March 31, 2023
Revenues from real estate operations	$	69,777	$	19,829	$	15,605	$	7,925	$	13,414	$	6,692	$	133,242	$	16,054	$	—	$	2,385	$	151,681
Property operating expenses	(24,520)		(7,572)		(7,945)		(3,543)		(4,636)		(594)		(48,810)		(8,851)		—		(1,759)		(59,420)
UJV NOI allocable to COPT	—		—		—		—		—		1,642		1,642		—		—		—		1,642
NOI from real estate operations	$	45,257	$	12,257	$	7,660	$	4,382	$	8,778	$	7,740	$	86,074	$	7,203	$	—	$	626	$	93,903
Additions to long-lived assets	$	12,135	$	2,398	$	62	$	759	$	6,594	$	—	$	21,948	$	3,278	$	—	$	11	$	25,237
Transfers from non-operating properties	$	5,781	$	238	$	28	$	2,650	$	14,392	$	3,311	$	26,400	$	13	$	—	$	—	$	26,413
Segment assets at March 31, 2023	$	1,390,273	$	486,649	$	193,160	$	169,235	$	472,237	$	324,422	$	3,035,976	$	545,817	$	—	$	3,321	$	3,585,114
Three Months Ended March 31, 2022
Revenues from real estate operations	$	67,214	$	18,576	$	14,713	$	8,169	$	9,195	$	7,505	$	125,372	$	15,082	$	1,980	$	1,826	$	144,260
Property operating expenses	(25,784)		(6,869)		(7,072)		(3,471)		(3,735)		(1,010)		(47,941)		(7,930)		(1,025)		(1,256)		(58,152)
UJV NOI allocable to COPT	—		—		—		—		—		1,080		1,080		—		—		—		1,080
NOI from real estate operations	$	41,430	$	11,707	$	7,641	$	4,698	$	5,460	$	7,575	$	78,511	$	7,152	$	955	$	570	$	87,188
Additions to long-lived assets	$	11,785	$	2,189	$	—	$	740	$	235	$	—	$	14,949	$	4,333	$	(51)	$	1	$	19,232
Transfers from non-operating properties	$	5,369	$	319	$	418	$	6,376	$	76	$	81,203	$	93,761	$	271	$	—	$	—	$	94,032
Segment assets at March 31, 2022	$	1,334,119	$	488,479	$	197,406	$	175,176	$	297,974	$	430,447	$	2,923,601	$	536,909	$	—	$	3,901	$	3,464,411

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

	For the Three Months Ended March 31,
	2023		2022
Segment revenues from real estate operations	$	151,681	$	144,260
Construction contract and other service revenues	15,820		53,200
Less: Revenues from discontinued operations	—		(1,980)
Total revenues	$	167,501	$	195,480

The following table reconciles our segment property operating expenses to property operating expenses as reported on our consolidated statements of operations (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Segment property operating expenses	$	59,420	$	58,152
Less: Property operating expenses from discontinued operations	—		(971)
Total property operating expenses	$	59,420	$	57,181

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

	For the Three Months Ended March 31,
	2023		2022
UJV NOI allocable to COPT	$	1,642	$	1,080
Less: Income from UJV allocable to COPT attributable to depreciation and amortization expense and interest expense	(1,704)		(758)
Add: Equity in (loss) income of unconsolidated non-real estate entities	(2)		566
Equity in (loss) income of unconsolidated entities	$	(64)	$	888

As previously discussed, we provide real estate services such as property management, development and construction services primarily for our properties but also for third parties.  The primary manner in which we evaluate the operating performance of our service activities is through a measure we define as net operating income from service operations (“NOI from service operations”), which is based on the net of revenues and expenses from these activities.  Construction contract and other service revenues and expenses consist primarily of subcontracted costs that are reimbursed to us by the customer along with a management fee. The operating margins from these activities are small relative to the revenue.  We believe NOI from service operations is a useful measure in assessing both our level of activity and our profitability in conducting such operations. The table below sets forth the computation of our NOI from service operations (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract and other service revenues	$	15,820	$	53,200
Construction contract and other service expenses	(15,201)		(51,650)
NOI from service operations	$	619	$	1,550

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

	For the Three Months Ended March 31,
	2023		2022
NOI from real estate operations	$	93,903	$	87,188
NOI from service operations	619		1,550
Depreciation and other amortization associated with real estate operations	(36,995)		(34,264)
General, administrative and leasing expenses	(9,995)		(8,544)
Business development expenses and land carry costs	(495)		(783)
Interest expense	(16,442)		(14,424)
Interest and other income	2,323		1,893
Credit loss (expense) recoveries	(67)		316
Gain on sales of real estate	49,378		15
Loss on early extinguishment of debt	—		(342)
Equity in (loss) income of unconsolidated entities	(64)		888
UJV NOI allocable to COPT included in equity in (loss) income of unconsolidated entities	(1,642)		(1,080)
Income tax expense	(125)		(153)
Revenues from real estate operations from discontinued operations	—		(1,980)
Property operating expenses from discontinued operations	—		971
Income from continuing operations	$	80,398	$	31,251

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

	March 31, 2023		March 31, 2022
Segment assets	$	3,585,114	$	3,464,411
Operating properties lease liabilities included in segment assets	35,327		29,729
Non-operating property assets	345,518		419,346
Other assets	212,033		218,540
Total consolidated assets	$	4,177,992	$	4,132,026

The accounting policies of the segments are the same as those used to prepare our consolidated financial statements, except that discontinued operations are not presented separately for segment purposes.  In the segment reporting presented above, we did not allocate interest expense, depreciation and amortization, gain on sales of real estate, loss on early extinguishment of debt and equity in (loss) income of unconsolidated entities not included in NOI to our real estate segments since they are not included in the measure of segment profit reviewed by management.  We also did not allocate general, administrative and leasing expenses, business development expenses and land carry costs, interest and other income, credit loss (expense) recoveries, income taxes and noncontrolling interests because these items represent general corporate or non-operating property items not attributable to segments.

13.    Construction Contract and Other Service Revenues

We disaggregate our construction contract and other service revenues by compensation arrangement and by service type as we believe it best depicts the nature, timing and uncertainty of our revenue. The table below reports construction contract and other service revenues by compensation arrangement (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract revenue:
Guaranteed maximum price	$	6,743	$	47,923
Firm fixed price	5,879		3,444
Cost-plus fee	2,709		1,306
Other	489		527
	$	15,820	$	53,200

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The table below reports construction contract and other service revenues by service type (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract revenue:
Construction	$	14,725	$	52,569
Design	606		104
Other	489		527
	$	15,820	$	53,200

We recognized an insignificant amount of revenue in the three months ended March 31, 2023 and 2022 from performance obligations satisfied (or partially satisfied) in previous periods.

Accounts receivable related to our construction contract services is included in accounts receivable, net on our consolidated balance sheets. The beginning and ending balances of accounts receivable related to our construction contracts were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	7,618	$	7,193
Ending balance	$	6,786	$	4,165

Contract assets are included in prepaid expenses and other assets, net on our consolidated balance sheets. The beginning and ending balances of our contract assets were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	22,331	$	22,384
Ending balance	$	20,619	$	29,389

Contract liabilities are included in other liabilities on our consolidated balance sheets. Changes in contract liabilities were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	2,867	$	2,499
Ending balance	$	3,399	$	2,534
Portion of beginning balance recognized in revenue during period	$	77	$	26

Revenue allocated to the remaining performance obligations under existing contracts as of March 31, 2023 that will be recognized as revenue in future periods was $61.5 million, of which we expect to recognize approximately $50 million in the nine months ending December 31, 2023 and the remainder in 2024.

We have no deferred incremental costs incurred to obtain or fulfill our construction contracts or other service revenues as of March 31, 2023 and December 31, 2022. We had credit loss recoveries on construction contracts receivable and unbilled construction revenue of $65,000 in the three months ended March 31, 2023 and $372,000 in the three months ended March 31, 2022.

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14.    Credit Losses on Financial Assets and Other Instruments

The table below sets forth the activity for our allowance for credit losses for the three months ended March 31, 2023 and 2022 (in thousands):

	Investing Receivables		Tenant Notes Receivable (1)		Other Assets (2)		Total
December 31, 2022	$	2,794	$	778	$	268	$	3,840
Credit loss expense (recoveries)	143		(19)		(57)		67
Write-offs	—		(33)		—		(33)
March 31, 2023	$	2,937	$	726	$	211	$	3,874
December 31, 2021	$	1,599	$	1,057	$	913	$	3,569
Credit loss expense (recoveries)	77		(34)		(359)		(316)
March 31, 2022	$	1,676	$	1,023	$	554	$	3,253

(1)Included in the line entitled “accounts receivable, net” on our consolidated balance sheets.

(2)The balance as of March 31, 2023 was included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet. The balance as of December 31, 2022 included $52,000 in the line entitled “accounts receivable, net” and $216,000 in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

The following table presents the amortized cost basis of our investing receivables, tenant notes receivable and sales-type lease receivables by credit risk classification, by origination year as of March 31, 2023 (in thousands):

	Origination Year
	2018 and Earlier		2019		2020		2021		2022		2023		Total
Investing receivables:
Credit risk classification:
Investment grade	$	61,092	$	—	$	1,931	$	7,569	$	—	$	—	$	70,592
Non-investment grade	—		—		—		—		17,844		—		17,844
Total	$	61,092	$	—	$	1,931	$	7,569	$	17,844	$	—	$	88,436
Tenant notes receivable:
Credit risk classification:
Investment grade	$	772	$	34	$	176	$	—	$	—	$	—	$	982
Non-investment grade	193		78		1,532		—		—		—		1,803
Total	$	965	$	112	$	1,708	$	—	$	—	$	—	$	2,785
Gross write-offs during the three months ended March 31, 2023	$	33	$	—	$	—	$	—	$	—	$	—	$	33
Sales-type lease receivables:
Credit risk classification:
Investment grade	$	—	$	—	$	5,528	$	—	$	—	$	—	$	5,528

Our investment grade credit risk classification represents entities with investment grade credit ratings from ratings agencies (such as S&P Global Ratings, Moody’s Investors Service, Inc. or Fitch Ratings, Inc.), meaning that they are considered to have at least an adequate capacity to meet their financial commitments, with credit risk ranging from minimal to moderate. Our non-investment grade credit risk classification represents entities with either no credit agency credit ratings or ratings deemed to be sub-investment grade; we believe that there is significantly more credit risk associated with this classification. The credit risk classifications of our investing receivables and tenant notes receivable were last updated in March 2023.

An insignificant portion of the investing and tenant notes receivables set forth above was past due, which we define as being delinquent by more than three months from the due date.

Notes receivable on nonaccrual status as of March 31, 2023 and December 31, 2022 were not significant. We did not recognize any interest income on notes receivable on nonaccrual status during the three months ended March 31, 2023 and 2022.

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15.    Share-Based Compensation

Restricted Shares

The following table summarizes restricted share activity under our share-based compensation plans for the three months ended March 31, 2023:

	Number of Shares	Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022	325,083	$	26.27
Granted	158,242	$	25.72
Forfeited	(24,510)	$	25.89
Vested	(124,838)	$	26.02
Unvested as of March 31, 2023	333,977	$	26.13

Restricted shares granted to employees vest based on increments and over periods of time set forth under the terms of the respective awards provided that the employee remains employed by us. Restricted shares granted to non-employee Trustees vest on the first anniversary of the grant date, provided that the Trustee remains in his or her position.

The aggregate intrinsic value of restricted shares that vested was $3.2 million for the three months ended March 31, 2023.

Profit Interest Units in COPLP (“PIUs”)

We granted two forms of PIUs: time-based PIUs (“TB-PIUs”); and performance-based PIUs (“PB-PIUs”). TB-PIUs are subject to forfeiture restrictions until the end of the requisite service period, at which time the TB-PIUs automatically convert into vested PIUs. PB-PIUs are subject to a market condition in that the number of earned awards are determined at the end of the performance period (as described further below) and then settled in vested PIUs. Vested PIUs carry substantially the same rights to redemption and distributions as non-PIU common units.

TB-PIUs

The following table summarizes TB-PIUs activity under our share-based compensation plans for the three months ended March 31, 2023:

	Number of TB-PIUs	Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022	187,330	$	26.19
Granted	82,334	$	25.72
Forfeited	(27,182)	$	26.46
Vested	(73,869)	$	26.07
Unvested as of March 31, 2023	168,613	$	25.97

TB-PIUs granted to senior management team members vest based on increments and over periods of time set forth under the terms of the respective awards provided that the employee remains employed by us. TB-PIUs granted to non-employee Trustees vest on the first anniversary of the grant date, provided that the Trustee remains in his or her position.

The aggregate intrinsic value of TB-PIUs that vested was $1.9 million for the three months ended March 31, 2023.

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PB-PIUs

On January 1, 2023, we granted certain senior management team members 275,402 PB-PIUs with a three-year performance period concluding on the earlier of December 31, 2025 or the date of: (1) termination by us without cause, death or disability of the employee or constructive discharge of the employee (collectively, “qualified termination”); or (2) a sale event.  The number of earned awards at the end of the performance period will be determined based on the percentile rank of COPT’s total shareholder return (“TSR”) relative to a peer group of companies, as set forth in the following schedule:

Percentile Rank	Earned PB-PIUs Payout %
75th or greater	100% of PB-PIUs granted
50th (target)	50% of PB-PIUs granted
25th	25% of PB-PIUs granted
Below 25th	0% of PB-PIUs granted

If the percentile rank exceeds the 25th percentile and is between two of the percentile ranks set forth in the table above, then the percentage of the earned awards will be interpolated between the ranges set forth in the table above to reflect any performance between the listed percentiles.  If COPT’s TSR during the measurement period is negative, the maximum number of earned awards will be limited to the target level payout percentage.  During the performance period, PB-PIUs carry rights to distributions equal to 10% of the distribution rights of non-PIU common units but carry no redemption rights.

At the end of the performance period, we will settle the award by issuing vested PIUs equal to: the number of earned awards; and the excess, if any, of (1) the aggregate distributions that would have been paid with respect to vested PIUs issued in settlement of the earned awards through the date of settlement had such vested PIUs been issued on the grant date over (2) the aggregate distributions made on the PB-PIUs during the performance period, divided by the price of our common shares on the settlement date. If a performance period ends due to a sale event or qualified termination, the number of earned awards is prorated based on the portion of the three-year performance period that has elapsed.  If employment is terminated by the employee or by us for cause, all PB-PIUs are forfeited.

These PB-PIU grants had an aggregate grant date fair value of $4.3 million ($31.54 per target-level award associated with the grants) which is being recognized over the performance period. The grant date fair value was computed using a Monte Carlo model that included the following assumptions: baseline common share value of $25.94; expected volatility for common shares of 35.0%; and a risk-free interest rate of 4.28%.  

During the three months ended March 31, 2023, 126,890 PB-PIUs were forfeited; these PB-PIUs had a weighted average grant date fair value per target-level award of $31.49.

Based on COPT’s TSR relative to its peer group of companies, for the 2020 PB-PIUs issued to executives that vested on December 31, 2022, we issued 141,152 PIUs in settlement of the PB-PIUs on February 1, 2023.

16.    Earnings Per Share (“EPS”)

We present both basic and diluted EPS.  We compute basic EPS by dividing net income available to common shareholders allocable to unrestricted common shares under the two-class method by the weighted average number of unrestricted common shares outstanding during the period.  Our computation of diluted EPS is similar except that:

•the denominator is increased to include: (1) the weighted average number of potential additional common shares that would have been outstanding if securities that are convertible into common shares were converted; and (2) the effect of dilutive potential common shares outstanding during the period attributable to redeemable noncontrolling interests and share-based compensation awards using the if-converted or treasury stock methods; and

•the numerator is adjusted to add back any changes in income or loss that would result from the assumed conversion into common shares that we add to the denominator.

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Summaries of the numerator and denominator for purposes of basic and diluted EPS calculations are set forth below (in thousands, except per share data):

	For the Three Months Ended March 31,
	2023		2022
Numerator:
Income from continuing operations	$	80,398	$	31,251
Income from continuing operations attributable to noncontrolling interests	(1,619)		(1,084)
Income from continuing operations attributable to share-based compensation awards for basic EPS	(297)		(116)
Numerator for basic EPS from continuing operations attributable to common shareholders	78,482		30,051
Redeemable noncontrolling interests	(64)		(39)
Adjustment to income from continuing operations attributable to share-based compensation awards for diluted EPS	49		18
Numerator for diluted EPS from continuing operations attributable to common shareholders	78,467		30,030
Discontinued operations	—		29,573
Discontinued operations attributable to noncontrolling interests	—		(421)
Income from discontinued operations attributable to share-based compensation awards for diluted EPS	—		(83)
Numerator for diluted EPS on net income attributable to common shareholders	$	78,467	$	59,099
Denominator (all weighted averages):
Denominator for basic EPS (common shares)	112,127		112,020
Dilutive effect of redeemable noncontrolling interests	91		132
Dilutive effect of share-based compensation awards	410		426
Denominator for diluted EPS (common shares)	112,628		112,578
Basic EPS attributable to common shareholders:
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.26
Net income	$	0.70	$	0.53
Diluted EPS attributable to common shareholders:
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.25
Net income	$	0.70	$	0.52

Our diluted EPS computations do not include the effects of the following securities since the conversions of such securities would increase diluted EPS for the respective periods (in thousands):

	Weighted Average Shares Excluded from Denominator
	For the Three Months Ended March 31,
	2023	2022
Conversion of common units	1,489	1,384
Conversion of redeemable noncontrolling interests	972	806

The following securities were also excluded from the computation of diluted EPS because their effect was antidilutive:

•weighted average restricted shares and deferred share awards for the three months ended March 31, 2023 and 2022 of 398,000 and 399,000, respectively;

•weighted average TB-PIUs for the three months ended March 31, 2023 and 2022 of 181,000 and 172,000, respectively; and

•weighted average vested PIUs for the three months ended March 31, 2023 of 103,000.

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17.    Commitments and Contingencies

Litigation and Claims

In the normal course of business, we are subject to legal actions and other claims.  We record losses for specific legal proceedings and claims when we determine that a loss is probable and the amount of loss can be reasonably estimated.  As of March 31, 2023, management believes that it is reasonably possible that we could recognize a loss of up to $4.1 million for certain municipal tax claims; while we do not believe this loss would materially affect our financial position or liquidity, it could be material to our results of operations. Management believes that it is also reasonably possible that we could incur losses pursuant to other claims but do not believe such losses would materially affect our financial position, liquidity or results of operations. Our assessment of the potential outcomes of these matters involves significant judgment and is subject to change based on future developments.

Environmental

We are subject to various federal, state and local environmental regulations related to our property ownership and operations.  We have performed environmental assessments of our properties, the results of which have not revealed any environmental liability that we believe would have a materially adverse effect on our financial position, operations or liquidity.

In connection with a lease and subsequent sale in 2008 and 2010 of three properties in Dayton, New Jersey, we agreed to provide certain environmental indemnifications limited to $19 million in the aggregate. We have insurance coverage in place to mitigate most of any potential future losses that may result from these indemnification agreements.

Tax Incremental Financing Obligation

Anne Arundel County, Maryland issued tax incremental financing bonds to third-party investors in order to finance public improvements needed in connection with our project known as the National Business Park.  These bonds had a remaining principal balance of approximately $29 million as of March 31, 2023. The real estate taxes on increases in assessed values post-bond issuance of properties in development districts encompassing the National Business Park are transferred to a special fund pledged to the repayment of the bonds. While we are obligated to fund, through a special tax, any future shortfalls between debt service of the bonds and real estate taxes available to repay the bonds, as of March 31, 2023, we do not expect any such future fundings will be required.

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Item 2.           Management’s Discussion and Analysis of Financial Condition and Results of Operations

Overview

During the three months ended March 31, 2023, we: 

•finished the period with our portfolio 92.8% occupied and 95.0% leased; and

•sold a 90% interest in three data center shell properties in Northern Virginia for $190.2 million, resulting in a gain on sale of $49.4 million. We used virtually all of the proceeds to pay down our Revolving Credit Facility to create additional borrowing capacity available to fund future development.

In addition, effective March 2, 2023, Todd W. Hartman resigned from his position as our Executive Vice President and Chief Operating Officer.

For operating portfolio square footage, occupancy and leasing statistics included below and elsewhere in this Quarterly Report on Form 10-Q, amounts disclosed include information pertaining to properties owned through unconsolidated real estate joint ventures.

We discuss significant factors contributing to changes in our net income in the section below entitled “Results of Operations.” In addition, the section below entitled “Liquidity and Capital Resources” includes discussions of, among other things:

•how we expect to generate and obtain cash for short and long-term capital needs; and

•material cash requirements for known contractual and other obligations.

You should refer to our consolidated financial statements and the notes thereto as you read this section.

This section contains “forward-looking” statements, as defined in the Private Securities Litigation Reform Act of 1995, that are based on our current expectations, estimates and projections about future events and financial trends affecting the financial condition and operations of our business. Forward-looking statements can be identified by the use of words such as “may,” “will,” “should,” “could,” “believe,” “anticipate,” “expect,” “estimate,” “plan” or other comparable terminology. Forward-looking statements are inherently subject to risks and uncertainties, many of which we cannot predict with accuracy and some of which we might not even anticipate. Although we believe that the expectations, estimates and projections reflected in such forward-looking statements are based on reasonable assumptions at the time made, we can give no assurance that these expectations, estimates and projections will be achieved. Future events and actual results may differ materially from those discussed in the forward-looking statements. We caution readers that forward-looking statements reflect our opinion only as of the date on which they were made. You should not place undue reliance on forward-looking statements. The following factors, among others, could cause actual results and future events to differ materially from those set forth or contemplated in the forward-looking statements:

•general economic and business conditions, which will, among other things, affect office property and data center demand and rents, tenant creditworthiness, interest rates, financing availability, property operating and construction costs, and property values;

•adverse changes in the real estate markets, including, among other things, increased competition with other companies;

•governmental actions and initiatives, including risks associated with the impact of a prolonged government shutdown or budgetary reductions or impasses, such as a reduction in rental revenues, non-renewal of leases and/or reduced or delayed demand for additional space by our strategic customers;

•our ability to borrow on favorable terms;

•risks of property acquisition and development activities, including, among other things, risks that development projects may not be completed on schedule, that tenants may not take occupancy or pay rent or that development or operating costs may be greater than anticipated;

•risks of investing through joint venture structures, including risks that our joint venture partners may not fulfill their financial obligations as investors or may take actions that are inconsistent with our objectives;

•changes in our plans for properties or views of market economic conditions or failure to obtain development rights, either of which could result in recognition of significant impairment losses;

•risks and uncertainties regarding the impact of the COVID-19 pandemic, and similar pandemics, along with restrictive measures instituted to prevent spread, on our business, the real estate industry and national, regional and local economic conditions;

•our ability to satisfy and operate effectively under federal income tax rules relating to real estate investment trusts and partnerships;

•possible adverse changes in tax laws;

•the dilutive effects of issuing additional common shares;

•our ability to achieve projected results;

•security breaches relating to cyber attacks, cyber intrusions or other factors, and other significant disruptions of our information technology networks and related systems; and

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•environmental requirements.

We undertake no obligation to publicly update or supplement forward-looking statements.

Occupancy and Leasing

The tables below set forth occupancy information:

	March 31, 2023			December 31, 2022
Occupancy rates at period end
Total	92.8		%	92.7		%
Defense/IT Locations:
Fort Meade/BW Corridor	93.4		%	92.7		%
NoVA Defense/IT	90.7		%	90.0		%
Lackland Air Force Base	100.0		%	100.0		%
Navy Support	87.8		%	89.8		%
Redstone Arsenal	89.8		%	89.9		%
Data Center Shells	100.0		%	100.0		%
Total Defense/IT Locations	94.4		%	94.1		%
Regional Office	77.4		%	79.0		%
Other	80.1		%	75.5		%
Annualized rental revenue per occupied square foot at period end	$	34.16		$	33.16

	Rentable Square Feet	Occupied Square Feet
	(in thousands)
December 31, 2022	23,006	21,327
Vacated upon lease expiration (1)	—	(142)
Occupancy for new leases	—	187
Development placed in service	11	—
Other changes	3	—
March 31, 2023	23,020	21,372

(1)Includes lease terminations and space reductions occurring in connection with lease renewals.

During the three months ended March 31, 2023, we leased 788,000 square feet, including: 495,000 square feet of development leasing; 194,000 square feet of renewal leasing (representing a tenant retention rate of 63.9%); and 99,000 square feet of vacant space leasing.

Annualized rental revenue is a measure that we use to evaluate the source of our rental revenue as of a point in time. It is computed by multiplying by 12 the sum of monthly contractual base rents and estimated monthly expense reimbursements under active leases as of a point in time (ignoring free rent then in effect and rent associated with tenant funded landlord assets). Our computation of annualized rental revenue excludes the effect of lease incentives. We consider annualized rental revenue to be a useful measure for analyzing revenue sources because, since it is point-in-time based, it does not contain increases and decreases in revenue associated with periods in which lease terms were not in effect; historical revenue under generally accepted accounting principles in the United States of America (“GAAP”) does contain such fluctuations. We find the measure particularly useful for leasing, tenant and segment analysis. Tenant retention rate is a measure we use that represents the percentage of square feet renewed in a period relative to the total square feet scheduled to expire in that period; we include the effect of early renewals in this measure.

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Results of Operations

We evaluate the operating performance of our properties using NOI from real estate operations, our segment performance measure, which includes: real estate revenues and property operating expenses from continuing and discontinued operations; and the net of revenues and property operating expenses of real estate operations owned through UJVs that is allocable to our ownership interest (“UJV NOI allocable to COPT”). The table below reconciles NOI from real estate operations to net income, the most directly comparable GAAP measure:

	For the Three Months Ended March 31,
	2023		2022
	(in thousands)
Net income	$	80,398	$	60,824
Construction contract and other service revenues	(15,820)		(53,200)
Depreciation and other amortization associated with real estate operations	36,995		34,264
Construction contract and other service expenses	15,201		51,650
General, administrative and leasing expenses	9,995		8,544
Business development expenses and land carry costs	495		783
Interest expense	16,442		14,424
Interest and other income	(2,323)		(1,893)
Credit loss expense (recoveries)	67		(316)
Gain on sales of real estate from continuing operations	(49,378)		(15)
Loss on early extinguishment of debt	—		342
Equity in loss (income) of unconsolidated entities	64		(888)
UJV NOI allocable to COPT included in equity in (loss) income of unconsolidated entities	1,642		1,080
Income tax expense	125		153
Discontinued operations	—		(29,573)
Revenues from real estate operations from discontinued operations	—		1,980
Property operating expenses from discontinued operations	—		(971)
NOI from real estate operations	$	93,903	$	87,188

We view our changes in NOI from real estate operations as being comprised of the following primary categories:

•Same Properties, which we define as properties stably owned and 100% operational throughout the current and prior year reporting periods being compared;

•developed or redeveloped properties placed into service that were not 100% operational throughout the current and prior year reporting periods; and

•disposed properties.

In addition to owning properties, we provide construction management and other services. The primary manner in which we evaluate the operating performance of our construction management and other service activities is through a measure we define as NOI from service operations, which is based on the net of the revenues and expenses from these activities.  The revenues and expenses from these activities consist primarily of subcontracted costs that are reimbursed to us by customers along with a management fee.  The operating margins from these activities are small relative to the revenue.  We believe NOI from service operations is a useful measure in assessing both our level of activity and our profitability in conducting such operations.

Since both of the measures discussed above exclude certain items includable in net income, reliance on these measures has limitations; management compensates for these limitations by using the measures simply as supplemental measures that are considered alongside other GAAP and non-GAAP measures. A reconciliation of NOI from real estate operations and NOI from service operations to income from continuing operations reported on the consolidated statements of operations is provided in Note 12 to our consolidated financial statements.

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Comparison of Statements of Operations for the Three Months Ended March 31, 2023 and 2022

	For the Three Months Ended March 31,
	2023		2022		Variance
	(in thousands)
Revenues
Revenues from real estate operations	$	151,681	$	142,280	$	9,401
Construction contract and other service revenues	15,820		53,200		(37,380)
Total revenues	167,501		195,480		(27,979)
Operating expenses
Property operating expenses	59,420		57,181		2,239
Depreciation and amortization associated with real estate operations	36,995		34,264		2,731
Construction contract and other service expenses	15,201		51,650		(36,449)
General, administrative and leasing expenses	9,995		8,544		1,451
Business development expenses and land carry costs	495		783		(288)
Total operating expenses	122,106		152,422		(30,316)
Interest expense	(16,442)		(14,424)		(2,018)
Interest and other income	2,323		1,893		430
Credit loss (expense) recoveries	(67)		316		(383)
Gain on sales of real estate	49,378		15		49,363
Loss on early extinguishment of debt	—		(342)		342
Equity in (loss) income of unconsolidated entities	(64)		888		(952)
Income tax expense	(125)		(153)		28
Income from continuing operations	80,398		31,251		49,147
Discontinued operations	—		29,573		(29,573)
Net income	$	80,398	$	60,824	$	19,574

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NOI from Real Estate Operations

	For the Three Months Ended March 31,
	2023			2022			Variance
	(Dollars in thousands,  except per square foot data)
Revenues
Same Properties revenues
Lease revenue, excluding lease termination revenue and provision for collectability losses	$	138,974		$	134,773		$	4,201
Lease termination revenue, net	1,221			221			1,000
Provision for collectability losses included in lease revenue	(1,168)			—			(1,168)
Other property revenue	1,084			859			225
Same Properties total revenues	140,111			135,853			4,258
Developed and redeveloped properties placed in service	9,514			407			9,107
Dispositions, net of retained interest in newly-formed UJVs	399			6,833			(6,434)
Other	1,657			1,167			490
	151,681			144,260			7,421
Property operating expenses
Same Properties	(56,735)			(55,507)			(1,228)
Developed and redeveloped properties placed in service	(1,228)			(74)			(1,154)
Dispositions, net of retained interest in newly-formed UJVs	(54)			(1,669)			1,615
Other	(1,403)			(902)			(501)
	(59,420)			(58,152)			(1,268)
UJV NOI allocable to COPT
Same Properties	1,076			1,080			(4)
Retained interest in newly-formed UJVs	566			—			566
	1,642			1,080			562
NOI from real estate operations
Same Properties	84,452			81,426			3,026
Developed and redeveloped properties placed in service	8,286			333			7,953
Dispositions, net of retained interest in newly-formed UJVs	911			5,164			(4,253)
Other	254			265			(11)
	$	93,903		$	87,188		$	6,715
Same Properties NOI from real estate operations by segment
Defense/IT Locations	$	76,876		$	73,969		$	2,907
Regional Office	7,203			7,152			51
Other	373			305			68
	$	84,452		$	81,426		$	3,026
Same Properties rent statistics
Average occupancy rate	92.1		%	91.2		%	0.9		%
Average straight-line rent per occupied square foot (1)	$	6.73		$	6.75		$	(0.02)

(1)Includes minimum base rents, net of abatements and lease incentives and excluding lease termination revenue, on a straight-line basis for the periods set forth above.

Our Same Properties pool consisted of 180 properties, comprising 89.5% of our portfolio’s square footage as of March 31, 2023. This pool of properties changed from the pool used for purposes of comparing 2022 and 2021 in our 2022 Annual Report on Form 10-K due to the: addition of seven properties placed in service and 100% operational on or before January 1, 2022 and two properties owned through an unconsolidated real estate joint venture that was formed in 2021; and removal of three properties in which we sold a 90% interest in 2023.

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Regarding the changes in NOI from real estate operations reported above:

•the increase for our Same Properties pool was due in large part to additional revenue in the current period resulting from higher occupancy and the commencement of tenant expense reimbursements on certain recently commenced leases;

•developed and redeveloped properties placed in service reflects the effect of nine properties placed in service in 2022 and 2023; and

•dispositions, net of retained interest in newly-formed UJVs reflects the effect of our sale of 90% of our interests in three data center shells in 2023 and two in 2022, as well as the sale of our wholesale data center on January 25, 2022.

NOI from Service Operations

	For the Three Months Ended March 31,
	2023		2022		Variance
	(in thousands)
Construction contract and other service revenues	$	15,820	$	53,200	$	(37,380)
Construction contract and other service expenses	(15,201)		(51,650)		36,449
NOI from service operations	$	619	$	1,550	$	(931)

Construction contract and other service revenues and expenses decreased in the current period due primarily to a lower volume of construction activity for one of our tenants. Construction contract activity is inherently subject to significant variability depending on the volume and nature of projects undertaken by us primarily on behalf of tenants. Service operations are an ancillary component of our overall operations that typically contribute an insignificant amount of income relative to our real estate operations.

General, Administrative and Leasing Expenses

General, administrative and leasing expenses increased primarily due to higher compensation related expenses in the current period.

Interest Expense

Interest expense increased due to higher weighted average variable interest rates in the current period. While our debt is predominantly fixed rate and in the form of long-term unsecured notes, for variable rate loans, we have used interest rate swaps to hedge the effect of interest rate increases on variable rate debt, including swaps for a $200.0 million notional amount that: fixed the one-month LIBOR interest rate in 2022 at 1.9% through December 1, 2022; and, effective February 1, 2023, fixed the one-month SOFR interest rate at 3.7% for a three-year term.

Discontinued Operations

Discontinued operations in the prior period relates to our wholesale data center, including $28.6 million in gain from its sale on January 25, 2022.

Funds from Operations

Funds from operations (“FFO”) is defined as net income computed using GAAP, excluding gains on sales and impairment losses of real estate and investments in UJVs (net of associated income tax) and real estate-related depreciation and amortization. FFO also includes adjustments to net income for the effects of the items noted above pertaining to UJVs that were allocable to our ownership interest in the UJVs. We believe that we use the National Association of Real Estate Investment Trusts (“Nareit”) definition of FFO, although others may interpret the definition differently and, accordingly, our presentation of FFO may differ from those of other REITs.  We believe that FFO is useful to management and investors as a supplemental measure of operating performance because, by excluding gains on sales and impairment losses of real estate (net of associated income tax), and real estate-related depreciation and amortization, FFO can help one compare our operating performance between periods.  In addition, since most equity REITs provide FFO information to the investment community, we believe that FFO is useful to investors as a supplemental measure for comparing our results to those of other equity REITs.  We believe that net income is the most directly comparable GAAP measure to FFO.

Since FFO excludes certain items includable in net income, reliance on the measure has limitations; management compensates for these limitations by using the measure simply as a supplemental measure that is weighed in balance with other GAAP and non-GAAP measures. FFO is not necessarily an indication of our cash flow available to fund cash needs.  Additionally, it should not be used as an alternative to net income when evaluating our financial performance or to cash flow from operating, investing and financing activities when evaluating our liquidity or ability to make cash distributions or pay debt service.

Basic FFO available to common share and common unit holders (“Basic FFO”) is FFO adjusted to subtract (1) preferred share dividends, (2) income attributable to noncontrolling interests through ownership of preferred units in the Operating

32

Partnership or interests in other consolidated entities not owned by us, (3) depreciation and amortization allocable to noncontrolling interests in other consolidated entities and (4) Basic FFO allocable to share-based compensation awards.  With these adjustments, Basic FFO represents FFO available to common shareholders and common unitholders.  Common units in the Operating Partnership are substantially similar to our common shares and are exchangeable into common shares, subject to certain conditions.  We believe that Basic FFO is useful to investors due to the close correlation of common units to common shares.  We believe that net income is the most directly comparable GAAP measure to Basic FFO.  Basic FFO has essentially the same limitations as FFO; management compensates for these limitations in essentially the same manner as described above for FFO.

Diluted FFO available to common share and common unit holders (“Diluted FFO”) is Basic FFO adjusted to add back any changes in Basic FFO that would result from the assumed conversion of securities that are convertible or exchangeable into common shares.  We believe that Diluted FFO is useful to investors because it is the numerator used to compute Diluted FFO per share, discussed below.  We believe that net income is the most directly comparable GAAP measure to Diluted FFO.  Since Diluted FFO excludes certain items includable in the numerator to diluted EPS, reliance on the measure has limitations; management compensates for these limitations by using the measure simply as a supplemental measure that is weighed in the balance with other GAAP and non-GAAP measures.  Diluted FFO is not necessarily an indication of our cash flow available to fund cash needs.  Additionally, it should not be used as an alternative to net income when evaluating our financial performance or to cash flow from operating, investing and financing activities when evaluating our liquidity or ability to make cash distributions or pay debt service.

Diluted FFO available to common share and common unit holders, as adjusted for comparability is defined as Diluted FFO adjusted to exclude: operating property acquisition costs; gain or loss on early extinguishment of debt; FFO associated with properties that secured non-recourse debt on which we defaulted and, subsequently, extinguished, via conveyance of such properties (including property NOI, interest expense and gains on debt extinguishment); loss on interest rate derivatives; executive transition costs associated with named executive officers; and, for periods prior to October 1, 2022, demolition costs on redevelopment and nonrecurring improvements and executive transition costs associated with other senior management team members. This measure also includes adjustments for the effects of the items noted above pertaining to UJVs that were allocable to our ownership interest in the UJVs. We believe this to be a useful supplemental measure alongside Diluted FFO as it excludes gains and losses from certain investing and financing activities and certain other items that we believe are not closely correlated to (or associated with) our operating performance. We believe that net income is the most directly comparable GAAP measure to this non-GAAP measure.  This measure has essentially the same limitations as Diluted FFO, as well as the further limitation of not reflecting the effects of the excluded items; we compensate for these limitations in essentially the same manner as described above for Diluted FFO.

Diluted FFO per share is (1) Diluted FFO divided by (2) the sum of the (a) weighted average common shares outstanding during a period, (b) weighted average common units outstanding during a period and (c) weighted average number of potential additional common shares that would have been outstanding during a period if other securities that are convertible or exchangeable into common shares were converted or exchanged.  We believe that Diluted FFO per share is useful to investors because it provides investors with a further context for evaluating our FFO results in the same manner that investors use earnings per share (“EPS”) in evaluating net income available to common shareholders.  In addition, since most equity REITs provide Diluted FFO per share information to the investment community, we believe that Diluted FFO per share is a useful supplemental measure for comparing us to other equity REITs. We believe that diluted EPS is the most directly comparable GAAP measure to Diluted FFO per share. Diluted FFO per share has most of the same limitations as Diluted FFO (described above); management compensates for these limitations in essentially the same manner as described above for Diluted FFO.

Diluted FFO per share, as adjusted for comparability is (1) Diluted FFO, as adjusted for comparability divided by (2) the sum of the (a) weighted average common shares outstanding during a period, (b) weighted average common units outstanding during a period and (c) weighted average number of potential additional common shares that would have been outstanding during a period if other securities that are convertible or exchangeable into common shares were converted or exchanged.  We believe that this measure is useful to investors because it provides investors with a further context for evaluating our FFO results.  We believe this to be a useful supplemental measure alongside Diluted FFO per share as it excludes gains and losses from investing and financing activities and certain other items that we believe are not closely correlated to (or associated with) our operating performance. We believe that diluted EPS is the most directly comparable GAAP measure to this per share measure.  This measure has most of the same limitations as Diluted FFO (described above) as well as the further limitation of not reflecting the effects of the excluded items; we compensate for these limitations in essentially the same manner as described above for Diluted FFO.

The computations for all of the above measures on a diluted basis assume the conversion of common units in COPLP but do not assume the conversion of other securities that are convertible into common shares if the conversion of those securities would increase per share measures in a given period.

33

The table below sets forth the computation of the above stated measures, and provides reconciliations to the GAAP measures associated with such measures:

	For the Three Months Ended March 31,
	2023		2022
	(Dollars and shares in thousands, except per share data)
Net income	$	80,398	$	60,824
Real estate-related depreciation and amortization	36,995		34,264
Gain on sales of real estate	(49,378)		(28,579)
Depreciation and amortization on UJVs allocable to COPT	801		526
FFO	68,816		67,035
FFO allocable to other noncontrolling interests	(708)		(1,042)
Basic FFO allocable to share-based compensation awards	(466)		(362)
Basic FFO available to common share and common unit holders	67,642		65,631
Redeemable noncontrolling interests	(30)		(6)
Diluted FFO adjustments allocable to share-based compensation awards	39		27
Diluted FFO available to common share and common unit holders	67,651		65,652
Loss on early extinguishment of debt	—		342
Diluted FFO comparability adjustments allocable to share-based compensation awards	—		(2)
Diluted FFO available to common share and common unit holders, as adjusted for comparability	$	67,651	$	65,992
Weighted average common shares	112,127		112,020
Conversion of weighted average common units	1,489		1,384
Weighted average common shares/units - Basic FFO per share	113,616		113,404
Dilutive effect of share-based compensation awards	410		426
Redeemable noncontrolling interests	91		132
Weighted average common shares/units - Diluted FFO per share and as adjusted for comparability	114,117		113,962
Diluted FFO per share	$	0.59	$	0.58
Diluted FFO per share, as adjusted for comparability	$	0.59	$	0.58
Denominator for diluted EPS	112,628		112,578
Weighted average common units	1,489		1,384
Denominator for diluted FFO per share and as adjusted for comparability	114,117		113,962

Property Additions

The table below sets forth the major components of our additions to properties for the three months ended March 31, 2023 (in thousands):

Development	$	70,038
Tenant improvements on operating properties (1)	18,603
Capital improvements on operating properties	2,140
	$	90,781

(1)Tenant improvement costs incurred on newly-developed properties are classified in this table as development and redevelopment.

Cash Flows

Net cash flow from operating activities increased $6.0 million when comparing the three months ended March 31, 2023 and 2022 due to an increase in cash flow from real estate operations resulting from the growth of our operating portfolio, which was partially offset by decreases associated with the timing of cash flow from third-party construction projects and higher payments for lease incentives in the current period.

Net cash flow provided by investing activities decreased $19.0 million when comparing the three months ended March 31, 2023 and 2022 due in large part to lower proceeds from properties sold in the current period (which included our sale of a 90% interest in three data center shells) relative to the prior period (which included the sale of our wholesale data center).

34

Net cash flow used in financing activities in the three months ended March 31, 2023 was $143.5 million, and included primarily the following:

•net repayments of debt borrowings during the period of $109.7 million, most of which resulted from the net paydown of our Revolving Credit Facility primarily using property sale proceeds; and

•dividends to common shareholders of $30.9 million.

Net cash flow used in financing activities in the three months ended March 31, 2022 was $150.4 million, and included primarily the following:

•net repayments of debt borrowings during the period of $116.8 million, which included the net effect of repaying a portion of a term loan facility using property sale proceeds, offset in part by net borrowings under our Revolving Credit Facility to fund property development; and

•dividends to common shareholders of $30.9 million.

Supplemental Guarantor Information

As of March 31, 2023, COPLP had several series of unsecured senior notes outstanding that were issued in transactions registered with the Securities and Exchange Commission under the Securities Act of 1933, as amended. These notes are COPLP’s direct, senior unsecured and unsubordinated obligations and rank equally in right of payment with all of COPLP’s existing and future senior unsecured and unsubordinated indebtedness. However, these notes are effectively subordinated in right of payment to COPLP’s existing and future secured indebtedness. The notes are also effectively subordinated in right of payment to all existing and future liabilities and other indebtedness, whether secured or unsecured, of COPLP's subsidiaries. COPT fully and unconditionally guarantees COPLP’s obligations under these notes. COPT’s guarantees of these notes are senior unsecured obligations that rank equally in right of payment with other senior unsecured obligations of, or guarantees by, COPT. COPT itself does not hold any indebtedness, and its only material asset is its investment in COPLP.

As permitted under Rule 13-01(a)(4)(vi), we do not provide summarized financial information for the Operating Partnership since: the assets, liabilities, and results of operations of the Company and the Operating Partnership are not materially different than the corresponding amounts presented in the consolidated financial statements of the Company; and we believe that inclusion of such summarized financial information would be repetitive and not provide incremental value to investors.

Liquidity and Capital Resources

As of March 31, 2023, we had $15.2 million in cash and cash equivalents.

We have a Revolving Credit Facility with a maximum borrowing capacity of $600.0 million. We use this facility to initially fund much of the cash requirements from our investing activities, including property development/redevelopment costs, as well as certain debt balloon payments due upon maturity.  We then subsequently pay down the facility using cash available from operations and proceeds from long-term borrowings, equity issuances and sales of interests in properties. The facility matures in October 2026 and may be extended by two six-month periods at our option, provided that there is no default under the facility and we pay an extension fee of 0.0625% of the total availability under the facility for each extension period. Our available borrowing capacity under the facility totaled $482.0 million as of March 31, 2023.

Our senior unsecured debt is rated investment grade by the three major rating agencies. We aim to maintain an investment grade rating to enable us to use debt comprised of unsecured, primarily fixed-rate debt (including the effect of interest rate swaps) from public markets and banks. We also use secured nonrecourse debt from institutional lenders and banks primarily for joint venture financings. In addition, we periodically raise equity when we access the public equity markets by issuing common shares and, to a lesser extent, preferred shares.

We have a program in place under which we may offer and sell common shares in at-the-market stock offerings having an aggregate gross sales price of up to $300 million. Under this program, we may also, at our discretion, sell common shares under forward equity sales agreements. The use of a forward equity sales agreement would enable us to lock in a price on a sale of common shares when the agreement is executed but defer issuing the shares and receiving the sale proceeds until a later date.

We believe that our liquidity and capital resources are adequate for our near-term and longer-term requirements without necessitating property sales. However, we may dispose of interests in properties opportunistically or when market conditions otherwise warrant.

Our material cash requirements, including contractual and other obligations, include:

•property operating expenses, including future lease obligations from us as a lessee;

•construction contract expenses;

•general and administrative expenses;

35

•debt service, including interest expense;

•property development/redevelopment costs;

•tenant and capital improvements and leasing costs for operating properties (expected to total approximately $75 million during the remainder of 2023);

•debt balloon payments due upon maturity; and

•dividends to our shareholders.

We expect to use cash flow from operations during the remainder of 2023 and annually thereafter for the foreseeable future to fund all of these cash requirements except for debt balloon payments due upon maturity and a portion of property development/redevelopment costs, the fundings for which are discussed below.

During the remainder of 2023, we expect to spend approximately $205 million on development costs, most of which was contractually obligated as of March 31, 2023; we expect to fund these cash requirements using, in part, remaining cash flow from operations, with the balance funded primarily using borrowings under our Revolving Credit Facility, at least initially. We have no debt balloon payments for the remainder of 2023.

Beyond 2023, we expect to continue to actively develop and redevelop properties and fund using, in part, remaining cash flow from operations, with the balance funded primarily using borrowings under our Revolving Credit Facility, at least initially.

We provide disclosure in our consolidated financial statements on our future lessee obligations (expected to be funded primarily by cash flow from operations) in Note 5 and future debt obligations (expected to be refinanced by new debt borrowings or funded by future equity issuances and/or sales of interests in properties) in Note 8.

Certain of our debt instruments require that we comply with a number of restrictive financial covenants, including maximum leverage ratio, unencumbered leverage ratio, minimum net worth, minimum fixed charge coverage, minimum unencumbered interest coverage ratio, minimum debt service and maximum secured indebtedness ratio.  As of March 31, 2023, we were compliant with these covenants.

Item 3.           Quantitative and Qualitative Disclosures about Market Risk

We are exposed to certain market risks, one of the most predominant of which is a change in interest rates.  Increases in interest rates can result in increased interest expense under our Revolving Credit Facility and other variable rate debt to the extent we do not have interest rate swaps in place to hedge the effect of such rate increases.  Increases in interest rates can also result in increased interest expense when our fixed rate debt matures and needs to be refinanced.

The following table sets forth as of March 31, 2023 our debt obligations and weighted average interest rates on debt maturing each year (dollars in thousands):

	For the Periods Ending December 31,
	2023		2024		2025		2026		2027		Thereafter		Total
Debt:
Fixed rate debt (1)	$	1,857	$	29,443	$	1,302	$	436,140	$	—	$	1,400,000	$	1,868,742
Weighted average interest rate	3.83%		4.42%		3.23%		2.38%		—%		2.58%		2.56%
Variable rate debt (2)	$	405	$	540	$	22,415	$	253,160	$	—	$	—	$	276,520
Weighted average interest rate (3)	6.19%		6.19%		6.23%		5.96%		—%		—%		5.99%

(1)Represents principal maturities only and therefore excludes net discounts and deferred financing costs of $22.3 million.

(2)As of March 31, 2023, maturities in 2026 included $118.0 million that may be extended to 2027 and $125.0 million that may be extended to 2028, both subject to certain conditions.

(3)The amounts reflected above used interest rates as of March 31, 2023 for variable rate debt.

The fair value of our debt was $1.8 billion as of March 31, 2023.  If interest rates had been 1% lower, the fair value of our fixed-rate debt would have increased by approximately $85 million as of March 31, 2023.

See Note 9 to our consolidated financial statements for information pertaining to interest rate swap contracts in place as of March 31, 2023 and their respective fair values.

Based on our variable-rate debt balances, including the effect of interest rate swap contracts, our interest expense would have increased by $278,000 in the three months ended March 31, 2023 if the applicable variable index rate was 1% higher.

36

Item 4.           Controls and Procedures

(a)    Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act) as of March 31, 2023.  Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of March 31, 2023 were functioning effectively to provide reasonable assurance that the information required to be disclosed in reports filed or submitted under the Securities Exchange Act of 1934 is (i) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and (ii) accumulated and communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

(b)    Change in Internal Control over Financial Reporting

No change in our internal control over financial reporting occurred during the most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II: OTHER INFORMATION

Item 1.           Legal Proceedings

We are not currently involved in any material litigation nor, to our knowledge, is any material litigation currently threatened against us (other than routine litigation arising in the ordinary course of business, substantially all of which is expected to be covered by liability insurance).

Item 1A.         Risk Factors

 There have been no material changes to the risk factors included in our 2022 Annual Report on Form 10-K.

Item 2.           Unregistered Sales of Equity Securities and Use of Proceeds

(a)    Not applicable

(b)    Not applicable

(c)    Not applicable

Item 3.           Defaults Upon Senior Securities

(a)    Not applicable

(b)    Not applicable

Item 4.           Mine Safety Disclosures

Not applicable

Item 5.           Other Information

(a)    Not applicable

(b)    Not applicable

37

Item 6.           Exhibits

(a)    Exhibits:

EXHIBIT NO.	DESCRIPTION
10.1	Confidential Post-Resignation Consulting Agreement and Release between Corporate Office Properties, L.P. and Todd W. Hartman, dated March 1, 2023 (filed with the Company's Current Report on Form 8-K dated March 2, 2023 and incorporated herein by reference).
22.1	List of Subsidiary Issuers and Guaranteed Securities (filed with the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 and incorporated herein by reference).
31.1	Certification of the Chief Executive Officer of Corporate Office Properties Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended (filed herewith).
31.2	Certification of the Chief Financial Officer of Corporate Office Properties Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended (filed herewith).
32.1	Certification of the Chief Executive Officer of Corporate Office Properties Trust required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Exchange Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.) (Furnished herewith).
32.2	Certification of the Chief Financial Officer of Corporate Office Properties Trust required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Exchange Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended). (Furnished herewith).
101.INS	XBRL Instance Document - The instance document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL document (filed herewith).
101.SCH	Inline XBRL Taxonomy Extension Schema Document (filed herewith).
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document (filed herewith).
101.LAB	Inline XBRL Extension Labels Linkbase (filed herewith).
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document (filed herewith).
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document (filed herewith).
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

38

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

			CORPORATE OFFICE PROPERTIES TRUST
Date:	May 3, 2023	By:	/s/ Stephen E. Budorick
			Stephen E. Budorick
			President and Chief Executive Officer
Date:	May 3, 2023	By:	/s/ Anthony Mifsud
			Anthony Mifsud
			Executive Vice President and Chief Financial Officer

39

EX-31.1

EXHIBIT 31.1

CORPORATE OFFICE PROPERTIES TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

CERTIFICATIONS

I, Stephen E. Budorick, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Corporate Office Properties Trust;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 3, 2023	/s/ Stephen E. Budorick
		Stephen E. Budorick
		President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CORPORATE OFFICE PROPERTIES TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

CERTIFICATIONS

I, Anthony Mifsud, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Corporate Office Properties Trust;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. 

Date:	May 3, 2023	/s/ Anthony Mifsud
		Anthony Mifsud
		Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CORPORATE OFFICE PROPERTIES TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Quarterly Report on Form 10-Q of Corporate Office Properties Trust (the “Company”) for the quarter ended March 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Stephen E. Budorick, President and Chief Executive Officer of the Company, certify that to my knowledge:

(1)    The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ Stephen E. Budorick
Stephen E. Budorick
President and Chief Executive Officer
Date:	May 3, 2023

EX-32.2

EXHIBIT 32.2

CORPORATE OFFICE PROPERTIES TRUST

CERTIFICATIONS REQUIRED BY

RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Quarterly Report on Form 10-Q of Corporate Office Properties Trust (the “Company”) for the quarter ended March 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Anthony Mifsud, Chief Financial Officer of the Company, certify that to my knowledge:

(1)    The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ Anthony Mifsud
Anthony Mifsud
Chief Financial Officer
Date:	May 3, 2023

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Cover - shares	3 Months Ended
	Mar. 31, 2023	Apr. 21, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	1-14023
Entity Registrant Name	CORPORATE OFFICE PROPERTIES TRUST
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	23-2947217
Entity Address, Address Line One	6711 Columbia Gateway Drive
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Columbia
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21046
City Area Code	443
Local Phone Number	285-5400
Title of 12(b) Security	Common Shares of beneficial interest, $0.01 par value
Trading Symbol	OFC
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		112,513,857
Entity Central Index Key	0000860546
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false

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Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Properties, net:
Operating properties, net	$ 3,272,873	$ 3,258,899
Projects in development or held for future development	341,202	297,499
Total properties, net	3,614,075	3,556,398
Property - operating right-of-use assets	42,808	37,020
Assets held for sale, net	0	161,286
Cash and cash equivalents	15,199	12,337
Investment in unconsolidated real estate joint ventures	42,279	21,460
Accounts receivable, net	46,149	43,334
Deferred rent receivable	130,153	125,147
Lease incentives, net	49,679	49,757
Deferred leasing costs (net of accumulated amortization of $36,416 and $35,270, respectively)	68,930	69,339
Prepaid expenses and other assets, net	83,221	96,576
Total assets	4,177,992	4,257,275
Liabilities:
Debt, net	2,123,012	2,231,794
Accounts payable and accrued expenses	128,509	157,998
Rents received in advance and security deposits	34,653	30,016
Dividends and distributions payable	32,630	31,400
Deferred revenue associated with operating leases	9,022	11,004
Property - operating lease liabilities	34,896	28,759
Other liabilities	21,008	18,556
Total liabilities	2,383,730	2,509,527
Commitments and contingencies (Note 17)
Redeemable noncontrolling interests	25,448	26,293
Shareholders’ equity:
Common Shares of beneficial interest ($0.01 par value; 150,000,000 shares authorized; shares issued and outstanding of 112,513,857 at March 31, 2023 and 112,423,893 at December 31, 2022)	1,125	1,124
Additional paid-in capital	2,484,501	2,486,116
Cumulative distributions in excess of net income	(760,820)	(807,508)
Accumulated other comprehensive income	1,353	2,071
Total shareholders’ equity	1,726,159	1,681,803
Noncontrolling interests in subsidiaries:
Common units in Corporate Office Properties, L.P. (“COPLP”)	29,268	25,808
Other consolidated entities	13,387	13,844
Noncontrolling interests in subsidiaries	42,655	39,652
Total equity	1,768,814	1,721,455
Total liabilities, redeemable noncontrolling interests and equity	4,177,992	4,257,275
Investing Receivables
Properties, net:
Investing receivables (net of allowance for credit losses of $2,937 and $2,794, respectively)	$ 85,499	$ 84,621

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accumulated amortization of deferred leasing costs	$ 36,416	$ 35,270
Common Shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 0.01
Common Shares of beneficial interest, shares authorized (in shares)	150,000,000	150,000,000
Common Shares of beneficial interest issued (in shares)	112,513,857	112,423,893
Common Shares of beneficial interest, shares outstanding (in shares)	112,513,857	112,423,893
Investing Receivables
Investing receivable allowance for credit loss	$ 2,937	$ 2,794

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Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Revenues
Lease revenue		$ 150,560	$ 141,389
Other property revenue		1,121	891
Construction contract and other service revenues		15,820	53,200
Total revenues		167,501	195,480
Operating expenses
Property operating expenses		59,420	57,181
Depreciation and amortization associated with real estate operations		36,995	34,264
Construction contract and other service expenses		15,201	51,650
General, administrative and leasing expenses		9,995	8,544
Business development expenses and land carry costs		495	783
Total operating expenses		122,106	152,422
Interest expense		(16,442)	(14,424)
Interest and other income		2,323	1,893
Credit loss (expense) recoveries		(67)	316
Gain on sales of real estate		49,378	15
Loss on early extinguishment of debt		0	(342)
Income from continuing operations before equity in (loss) income of unconsolidated entities and income taxes		80,587	30,516
Equity in (loss) income of unconsolidated entities		(64)	888
Income tax expense		(125)	(153)
Income from continuing operations		80,398	31,251
Discontinued operations		0	29,573
Net income		80,398	60,824
Net income attributable to noncontrolling interests:
Common units in COPLP		(1,293)	(856)
Other consolidated entities		(326)	(649)
Net income attributable to common shareholders		$ 78,779	$ 59,319
Basic earnings per common share:
Income from continuing operations - basic (in dollars per share)	[1]	$ 0.70	$ 0.27
Discontinued operations - basic (in dollars per share)	[1]	0	0.26
Net income attributable to common shareholders - basic (in dollars per share)	[1]	0.70	0.53
Diluted earnings per common share:
Income from continuing operations - diluted (in dollars per share)	[1]	0.70	0.27
Discontinued operations - diluted (in dollars per share)	[1]	0	0.25
Net income attributable to common shareholders - diluted (in dollars per share)	[1]	$ 0.70	$ 0.52

[1] Basic and diluted earnings per common share are calculated based on amounts attributable to common shareholders.

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 80,398	$ 60,824
Other comprehensive (loss) income:
Unrealized (loss) income on interest rate derivatives	(215)	2,537
Reclassification adjustments on interest rate derivatives recognized in interest expense	(591)	1,003
Total other comprehensive (loss) income	(806)	3,540
Comprehensive income	79,592	64,364
Comprehensive income attributable to noncontrolling interests	(1,531)	(1,822)
Comprehensive income attributable to common shareholders	$ 78,061	$ 62,542

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Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Cumulative Distributions in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balance at Dec. 31, 2021	$ 1,657,075	$ 1,123	$ 2,481,539	$ (856,863)	$ (3,059)	$ 34,335
Increase (Decrease) in Shareholders' Equity
Redemption of common units	(212)					(212)
Share-based compensation issuance, net of redemptions	2,301	1	1,014			1,286
Redemption of vested equity awards	(1,059)		(1,059)
Adjustments to noncontrolling interests resulting from changes in ownership of COPLP	0		(2,414)			2,414
Comprehensive income	63,797			59,319	3,223	1,255
Dividends	(30,929)			(30,929)
Distributions to owners of common units in COPLP	(469)					(469)
Distributions to noncontrolling interests in other consolidated entities	(7)					(7)
Adjustments for changes in fair value of redeemable noncontrolling interests	39		39
Balance at Mar. 31, 2022	1,690,536	1,124	2,479,119	(828,473)	164	38,602
Balance at Dec. 31, 2022	1,721,455	1,124	2,486,116	(807,508)	2,071	39,652
Increase (Decrease) in Shareholders' Equity
Redemption of common units	(373)					(373)
Share-based compensation issuance, net of redemptions	1,814	1	1,059			754
Redemption of vested equity awards	(1,113)		(1,113)
Adjustments to noncontrolling interests resulting from changes in ownership of COPLP	0		(2,342)			2,342
Comprehensive income	78,893			78,779	(718)	832
Dividends	(32,091)			(32,091)
Distributions to owners of common units in COPLP	(544)					(544)
Distributions to noncontrolling interests in other consolidated entities	(8)					(8)
Adjustments for changes in fair value of redeemable noncontrolling interests	781		781
Balance at Mar. 31, 2023	$ 1,768,814	$ 1,125	$ 2,484,501	$ (760,820)	$ 1,353	$ 42,655

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Consolidated Statements of Equity (Parenthetical) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Beginning balance (in shares)	112,423,893	112,327,533
Share-based compensation issuance, net of redemptions (in shares)	89,964	91,278
Ending balance (in shares)	112,513,857	112,418,811

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Revenues from real estate operations received	$ 152,273	$ 133,550
Construction contract and other service revenues received	18,765	49,436
Property operating expenses paid	(55,753)	(56,132)
Construction contract and other service expenses paid	(21,999)	(47,380)
General, administrative, leasing, business development and land carry costs paid	(11,681)	(13,196)
Interest expense paid	(12,031)	(9,949)
Lease incentives paid	(10,350)	(5,677)
Other	(479)	2,059
Net cash provided by operating activities	58,745	52,711
Cash flows from investing activities
Development and redevelopment of properties	(71,282)	(91,783)
Tenant improvements on operating properties	(22,568)	(7,989)
Other capital improvements on operating properties	(5,512)	(14,529)
Proceeds from sale of properties	189,325	220,814
Leasing costs paid	(4,655)	(2,103)
Other	(125)	(190)
Net cash provided by investing activities	85,183	104,220
Proceeds from debt
Revolving Credit Facility	95,000	244,000
Repayments of debt
Revolving Credit Facility	(188,000)	(160,000)
Term loan facility	0	(200,000)
Scheduled principal amortization	(790)	(774)
Other debt repayments	(15,902)	0
Common share dividends paid	(30,941)	(30,904)
Other	(2,900)	(2,725)
Net cash used in financing activities	(143,533)	(150,403)
Net increase in cash and cash equivalents and restricted cash	395	6,528
Cash and cash equivalents and restricted cash
Cash and cash equivalents and restricted cash at beginning of period	16,509	17,316
Cash and cash equivalents and restricted cash at end of period	16,904	23,844
Reconciliation of net income to net cash provided by operating activities:
Net income	80,398	60,824
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and other amortization	37,597	34,871
Amortization of deferred financing costs and net debt discounts	1,250	1,202
Increase in deferred rent receivable	(6,869)	(5,822)
Gain on sales of real estate	(49,378)	(28,579)
Share-based compensation	1,733	2,111
Other	(376)	(1,021)
Changes in operating assets and liabilities:
Increase in accounts receivable	(2,802)	(1,994)
Decrease in lease incentives and prepaid expenses and other assets, net	9,361	1,585
Decrease in accounts payable, accrued expenses and other liabilities	(16,806)	(7,286)
Increase (decrease) in rents received in advance and security deposits	4,637	(3,180)
Net cash provided by operating activities	58,745	52,711
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents at beginning of period	12,337	13,262
Restricted cash at beginning of period	4,172	4,054
Cash and cash equivalents and restricted cash at beginning of period	16,509	17,316
Cash and cash equivalents at end of period	15,199	19,347
Restricted cash at end of period	1,705	4,497
Cash and cash equivalents and restricted cash at end of period	16,904	23,844
Supplemental schedule of non-cash investing and financing activities:
Decrease in accrued capital improvements, leasing and other investing activity costs	(11,043)	(33,733)
Recognition of operating right-of-use assets and related lease liabilities	6,697	683
Recognition of finance right-of-use assets and related lease liabilities	434	0
Investment in unconsolidated real estate joint venture retained in property disposition	21,121	0
(Decrease) increase in fair value of derivatives applied to accumulated other comprehensive income and noncontrolling interests	(806)	3,478
Dividends/distributions payable	32,630	31,402
Adjustments to noncontrolling interests resulting from changes in COPLP ownership	2,342	2,414
Decrease in redeemable noncontrolling interests and increase in equity to adjust for changes in fair value of redeemable noncontrolling interests	$ (781)	$ (39)

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Organization

3 Months Ended

Mar. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

Corporate Office Properties Trust (“COPT”) and subsidiaries (collectively, the “Company”, “we” or “us”) is a fully-integrated and self-managed real estate investment trust (“REIT”). We own, manage, lease, develop and selectively acquire office and data center properties. The majority of our portfolio is in locations that support the United States Government (“USG”) and its contractors, most of whom are engaged in national security, defense and information technology (“IT”) related activities servicing what we believe are growing, durable, priority missions (“Defense/IT Locations”). We also own a portfolio of office properties located in select urban submarkets in the Greater Washington, DC/Baltimore region with durable Class-A office fundamentals and characteristics (“Regional Office”). As of March 31, 2023, our properties included the following:

•194 properties totaling 23.0 million square feet comprised of 17.7 million square feet in 166 office properties and 5.3 million square feet in 28 single-tenant data center shells. We owned 24 of these data center shells through unconsolidated real estate joint ventures;

•nine properties under development (five office properties and four data center shells), including one partially-operational property, that we estimate will total approximately 1.5 million square feet upon completion; and

•approximately 680 acres of land controlled for future development that we believe could be developed into approximately 9.0 million square feet and approximately 40 acres of other land.

We conduct almost all of our operations and own almost all of our assets through our operating partnership, Corporate Office Properties, L.P. (“COPLP”) and subsidiaries (collectively, the “Operating Partnership”), of which COPT is the sole general partner. COPLP owns real estate directly and through subsidiary partnerships and limited liability companies (“LLCs”).  In addition to owning real estate, COPLP also owns subsidiaries that provide real estate services such as property management, development and construction services primarily for our properties but also for third parties. Some of these services are performed by a taxable REIT subsidiary (“TRS”).

Equity interests in COPLP are in the form of common and preferred units. As of March 31, 2023, COPT owned 97.9% of the outstanding COPLP common units (“common units”) and there were no preferred units outstanding. Common units not owned by COPT carry certain redemption rights. The number of common units owned by COPT is equivalent to the number of outstanding common shares of beneficial interest (“common shares”) of COPT, and the entitlement of common units to quarterly distributions and payments in liquidation is substantially the same as that of COPT common shareholders.

COPT’s common shares are publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “OFC”.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Basis of Presentation

These consolidated financial statements include the accounts of COPT, the Operating Partnership, their subsidiaries and other entities in which COPT has a majority voting interest and control.  We also consolidate certain entities when control of such entities can be achieved through means other than voting rights (“variable interest entities” or “VIEs”) if we are deemed to be the primary beneficiary of such entities.  We eliminate all intercompany balances and transactions in consolidation.

We use the equity method of accounting when we own an interest in an entity and can exert significant influence over but cannot control the entity’s operations. We discontinue equity method accounting if our investment in an entity (and net advances) is reduced to zero unless we have guaranteed obligations of the entity or are otherwise committed to provide further financial support for the entity.

When we own an equity investment in an entity and cannot exert significant influence over its operations, we measure the investment at fair value, with changes recognized through net income. For an investment without a readily determinable fair value, we measure the investment at cost, less any impairments, plus or minus changes resulting from observable price changes for an identical or similar investment of the same issuer.

These interim financial statements should be read together with the consolidated financial statements and notes thereto as of and for the year ended December 31, 2022 included in our 2022 Annual Report on Form 10-K.  The unaudited consolidated financial statements include all adjustments that are necessary, in the opinion of management, to fairly state our financial position and results of operations.  All adjustments are of a normal recurring nature.  The consolidated financial statements have been prepared using the accounting policies described in our 2022 Annual Report on Form 10-K.

Reclassifications

We reclassified certain amounts from prior periods to conform to the current period presentation of our consolidated financial statements with no effect on previously reported net income or equity.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Recurring Fair Value Measurements

We have a non-qualified elective deferred compensation plan for Trustees and certain members of our management team that, prior to December 31, 2019, permitted participants to defer up to 100% of their compensation on a pre-tax basis and receive a tax-deferred return on such deferrals. Effective December 31, 2019, no new investments of deferred compensation were eligible for the plan.  The assets held in the plan (comprised primarily of mutual funds and equity securities) and the corresponding liability to the participants are measured at fair value on a recurring basis on our consolidated balance sheets using quoted market prices, as are other marketable securities that we hold. The balance of the plan, which was fully funded and totaled $1.9 million as of March 31, 2023, is included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheets along with an insignificant amount of other marketable securities. The offsetting liability associated with the plan is adjusted to fair value at the end of each accounting period based on the fair value of the plan assets and reported in “other liabilities” on our consolidated balance sheets. The assets of the plan are classified in Level 1 of the fair value hierarchy, while the offsetting liability is classified in Level 2 of the fair value hierarchy.

The fair values of our interest rate derivatives, as disclosed in Note 9, are determined using widely accepted valuation techniques, including a discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate market data and implied volatilities in such interest rates. While we determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our interest rate derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default. However, as of March 31, 2023, we assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivatives and determined that these adjustments were not significant. As a result, we determined that our interest rate derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

The carrying values of cash and cash equivalents, restricted cash, accounts receivable, other assets (excluding investing receivables) and accounts payable and accrued expenses are reasonable estimates of their fair values because of the short maturities of these instruments.  The fair values of our investing receivables, as disclosed in Note 7, were based on the discounted estimated future cash flows of the loans (categorized within Level 3 of the fair value hierarchy); the discount rates used approximate current market rates for loans with similar maturities and credit quality, and the estimated cash payments include scheduled principal and interest payments.  For our disclosure of debt fair values in Note 8, we estimated the fair value of our unsecured senior notes based on quoted market rates for our senior notes (categorized within Level 1 of the fair value hierarchy) and estimated the fair value of our other debt based on the discounted estimated future cash payments to be made on such debt (categorized within Level 3 of the fair value hierarchy); the discount rates used approximate current market rates for loans, or groups of loans, with similar maturities and credit quality, and the estimated future payments include scheduled principal and interest payments.  Fair value estimates are made as of a specific point in time, are subjective in nature and involve uncertainties and matters of significant judgment. 

The table below sets forth our financial assets and liabilities accounted for at fair value on a recurring basis as of March 31, 2023 and the hierarchy level of inputs used in measuring their respective fair values under applicable accounting standards (in thousands):

Description	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable  Inputs (Level 3)		Total
Assets: (1)
Marketable securities in deferred compensation plan
Mutual funds	$	1,831	$	—	$	—	$	1,831
Other	44		—		—		44
Interest rate derivatives	—		2,179		—		2,179
Total assets	$	1,875	$	2,179	$	—	$	4,054
Liabilities: (2)
Deferred compensation plan liability	$	—	$	1,875	$	—	$	1,875
Interest rate derivatives	—		355		—		355
Total liabilities	$	—	$	2,230	$	—	$	2,230

(1)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

(2)Included in the line entitled “other liabilities” on our consolidated balance sheet.

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Properties, Net

3 Months Ended

Mar. 31, 2023

Real Estate [Abstract]

Properties, Net

Properties, Net

Operating properties, net consisted of the following (in thousands): 

	March 31, 2023		December 31, 2022
Land	$	540,037	$	539,809
Buildings and improvements	4,033,266		3,986,524
Less: Accumulated depreciation	(1,300,430)		(1,267,434)
Operating properties, net	$	3,272,873	$	3,258,899

2023 Dispositions

On January 10, 2023, we sold a 90% interest in three data center shell properties in Northern Virginia based on an aggregate property value of $211.3 million and retained a 10% interest in the properties through Redshift JV LLC, a newly-formed joint venture. Our partner in the joint venture acquired the 90% interest from us for $190.2 million. We account for our interest in the joint venture using the equity method of accounting, as described further in Note 6. We recognized a gain on sale of $49.4 million. The table below sets forth the components of the properties’ assets, which were classified as held for sale on our consolidated balance sheet as of December 31, 2022 (in thousands):

Properties, net	$	156,691
Deferred rent receivable	4,595
Assets held for sale, net	$	161,286

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Leases

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

Leases

Leases

Lessor Arrangements

We lease real estate properties, comprised primarily of office properties and data center shells, to third parties. These leases encompass all, or a portion, of properties, with various expiration dates. Our lease revenue is comprised of: fixed lease revenue, including contractual rent billings under leases recognized on a straight-line basis over lease terms and amortization of lease incentives and above- and below- market lease intangibles; and variable lease revenue, including tenant expense recoveries, lease termination revenue and other revenue from tenants that is not fixed under leases. The table below sets forth our composition of lease revenue recognized between fixed and variable lease revenue (in thousands):

	For the Three Months Ended March 31,
Lease revenue (1)	2023		2022
Fixed	$	116,039	$	111,167
Variable	34,521		30,222
	$	150,560	$	141,389

(1)Excludes lease revenue from discontinued operations of which $1.5 million was fixed and $527,000 was variable for the three months ended March 31, 2022.

Fixed contractual payments due under our property leases were as follows (in thousands):

	As of March 31, 2023
Year Ending December 31,	Operating leases		Sales-type leases
2023 (1)	$	329,700	$	720
2024	415,499		960
2025	332,260		960
2026	263,741		960
2027	228,712		960
Thereafter	1,023,570		2,596
Total contractual payments	$	2,593,482	7,156
Less: Amount representing interest			(1,628)
Net investment in sales-type leases (2)			$	5,528

(1)Represents the nine months ending December 31, 2023.

(2)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

Lessee Arrangements

As of March 31, 2023, our balance sheet included $45.4 million in right-of-use assets associated primarily with land leased from third parties underlying certain properties that we are operating with various expiration dates. Our property right-of-use assets and property lease liabilities on our consolidated balance sheets consisted of the following (in thousands):

Leases	Balance Sheet Location	March 31, 2023		December 31, 2022
Right-of-use assets
Operating leases - Property	Property - operating right-of-use assets	$	42,808	$	37,020
Finance leases - Property	Prepaid expenses and other assets, net	2,621		2,207
Total right-of-use assets		$	45,429	$	39,227
Lease liabilities
Operating leases - Property	Property - operating lease liabilities	$	34,896	$	28,759
Finance leases - Property	Other liabilities	431		—
Total lease liabilities		$	35,327	$	28,759

As of March 31, 2023, our operating leases had a weighted average remaining lease term of 45 years and a weighted average discount rate of 7.34%, while our finance leases had a weighted average remaining lease term of ten years and a weighted average discount rate of 9.14%. The table below presents our total property lease costs (in thousands):

	Statement of Operations Location	For the Three Months Ended March 31,
Lease cost		2023		2022
Operating lease cost
Property leases - fixed	Property operating expenses	$	1,535	$	1,019
Property leases - variable	Property operating expenses	17		16
Finance lease cost
Amortization of property right-of-use assets	Property operating expenses	20		8
Interest on lease liabilities	Interest expense	13		—
		$	1,585	$	1,043

The table below presents the effect of property lease payments on our consolidated statements of cash flows (in thousands):

	For the Three Months Ended March 31,
Supplemental cash flow information	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,185	$	837
Operating cash flows for financing leases	$	13	$	—
Financing cash flows for financing leases	$	4	$	—

Payments on property leases were due as follows (in thousands):

	March 31, 2023
Year Ending December 31,	Operating Leases		Finance Leases
2023 (1)	$	4,863	$	45
2024	6,623		61
2025	2,249		63
2026	1,662		65
2027	1,677		67
Thereafter	130,495		365
Total lease payments	147,569		666
Less: Amount representing interest	(112,673)		(235)
Lease liability	$	34,896	$	431

(1)Represents the nine months ending December 31, 2023.

Leases

Leases

Lessor Arrangements

We lease real estate properties, comprised primarily of office properties and data center shells, to third parties. These leases encompass all, or a portion, of properties, with various expiration dates. Our lease revenue is comprised of: fixed lease revenue, including contractual rent billings under leases recognized on a straight-line basis over lease terms and amortization of lease incentives and above- and below- market lease intangibles; and variable lease revenue, including tenant expense recoveries, lease termination revenue and other revenue from tenants that is not fixed under leases. The table below sets forth our composition of lease revenue recognized between fixed and variable lease revenue (in thousands):

	For the Three Months Ended March 31,
Lease revenue (1)	2023		2022
Fixed	$	116,039	$	111,167
Variable	34,521		30,222
	$	150,560	$	141,389

(1)Excludes lease revenue from discontinued operations of which $1.5 million was fixed and $527,000 was variable for the three months ended March 31, 2022.

Fixed contractual payments due under our property leases were as follows (in thousands):

	As of March 31, 2023
Year Ending December 31,	Operating leases		Sales-type leases
2023 (1)	$	329,700	$	720
2024	415,499		960
2025	332,260		960
2026	263,741		960
2027	228,712		960
Thereafter	1,023,570		2,596
Total contractual payments	$	2,593,482	7,156
Less: Amount representing interest			(1,628)
Net investment in sales-type leases (2)			$	5,528

(1)Represents the nine months ending December 31, 2023.

(2)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

Lessee Arrangements

As of March 31, 2023, our balance sheet included $45.4 million in right-of-use assets associated primarily with land leased from third parties underlying certain properties that we are operating with various expiration dates. Our property right-of-use assets and property lease liabilities on our consolidated balance sheets consisted of the following (in thousands):

Leases	Balance Sheet Location	March 31, 2023		December 31, 2022
Right-of-use assets
Operating leases - Property	Property - operating right-of-use assets	$	42,808	$	37,020
Finance leases - Property	Prepaid expenses and other assets, net	2,621		2,207
Total right-of-use assets		$	45,429	$	39,227
Lease liabilities
Operating leases - Property	Property - operating lease liabilities	$	34,896	$	28,759
Finance leases - Property	Other liabilities	431		—
Total lease liabilities		$	35,327	$	28,759

As of March 31, 2023, our operating leases had a weighted average remaining lease term of 45 years and a weighted average discount rate of 7.34%, while our finance leases had a weighted average remaining lease term of ten years and a weighted average discount rate of 9.14%. The table below presents our total property lease costs (in thousands):

	Statement of Operations Location	For the Three Months Ended March 31,
Lease cost		2023		2022
Operating lease cost
Property leases - fixed	Property operating expenses	$	1,535	$	1,019
Property leases - variable	Property operating expenses	17		16
Finance lease cost
Amortization of property right-of-use assets	Property operating expenses	20		8
Interest on lease liabilities	Interest expense	13		—
		$	1,585	$	1,043

The table below presents the effect of property lease payments on our consolidated statements of cash flows (in thousands):

	For the Three Months Ended March 31,
Supplemental cash flow information	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,185	$	837
Operating cash flows for financing leases	$	13	$	—
Financing cash flows for financing leases	$	4	$	—

Payments on property leases were due as follows (in thousands):

	March 31, 2023
Year Ending December 31,	Operating Leases		Finance Leases
2023 (1)	$	4,863	$	45
2024	6,623		61
2025	2,249		63
2026	1,662		65
2027	1,677		67
Thereafter	130,495		365
Total lease payments	147,569		666
Less: Amount representing interest	(112,673)		(235)
Lease liability	$	34,896	$	431

(1)Represents the nine months ending December 31, 2023.

Leases

Leases

Lessor Arrangements

We lease real estate properties, comprised primarily of office properties and data center shells, to third parties. These leases encompass all, or a portion, of properties, with various expiration dates. Our lease revenue is comprised of: fixed lease revenue, including contractual rent billings under leases recognized on a straight-line basis over lease terms and amortization of lease incentives and above- and below- market lease intangibles; and variable lease revenue, including tenant expense recoveries, lease termination revenue and other revenue from tenants that is not fixed under leases. The table below sets forth our composition of lease revenue recognized between fixed and variable lease revenue (in thousands):

	For the Three Months Ended March 31,
Lease revenue (1)	2023		2022
Fixed	$	116,039	$	111,167
Variable	34,521		30,222
	$	150,560	$	141,389

(1)Excludes lease revenue from discontinued operations of which $1.5 million was fixed and $527,000 was variable for the three months ended March 31, 2022.

Fixed contractual payments due under our property leases were as follows (in thousands):

	As of March 31, 2023
Year Ending December 31,	Operating leases		Sales-type leases
2023 (1)	$	329,700	$	720
2024	415,499		960
2025	332,260		960
2026	263,741		960
2027	228,712		960
Thereafter	1,023,570		2,596
Total contractual payments	$	2,593,482	7,156
Less: Amount representing interest			(1,628)
Net investment in sales-type leases (2)			$	5,528

(1)Represents the nine months ending December 31, 2023.

(2)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

Lessee Arrangements

As of March 31, 2023, our balance sheet included $45.4 million in right-of-use assets associated primarily with land leased from third parties underlying certain properties that we are operating with various expiration dates. Our property right-of-use assets and property lease liabilities on our consolidated balance sheets consisted of the following (in thousands):

Leases	Balance Sheet Location	March 31, 2023		December 31, 2022
Right-of-use assets
Operating leases - Property	Property - operating right-of-use assets	$	42,808	$	37,020
Finance leases - Property	Prepaid expenses and other assets, net	2,621		2,207
Total right-of-use assets		$	45,429	$	39,227
Lease liabilities
Operating leases - Property	Property - operating lease liabilities	$	34,896	$	28,759
Finance leases - Property	Other liabilities	431		—
Total lease liabilities		$	35,327	$	28,759

As of March 31, 2023, our operating leases had a weighted average remaining lease term of 45 years and a weighted average discount rate of 7.34%, while our finance leases had a weighted average remaining lease term of ten years and a weighted average discount rate of 9.14%. The table below presents our total property lease costs (in thousands):

	Statement of Operations Location	For the Three Months Ended March 31,
Lease cost		2023		2022
Operating lease cost
Property leases - fixed	Property operating expenses	$	1,535	$	1,019
Property leases - variable	Property operating expenses	17		16
Finance lease cost
Amortization of property right-of-use assets	Property operating expenses	20		8
Interest on lease liabilities	Interest expense	13		—
		$	1,585	$	1,043

The table below presents the effect of property lease payments on our consolidated statements of cash flows (in thousands):

	For the Three Months Ended March 31,
Supplemental cash flow information	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,185	$	837
Operating cash flows for financing leases	$	13	$	—
Financing cash flows for financing leases	$	4	$	—

Payments on property leases were due as follows (in thousands):

	March 31, 2023
Year Ending December 31,	Operating Leases		Finance Leases
2023 (1)	$	4,863	$	45
2024	6,623		61
2025	2,249		63
2026	1,662		65
2027	1,677		67
Thereafter	130,495		365
Total lease payments	147,569		666
Less: Amount representing interest	(112,673)		(235)
Lease liability	$	34,896	$	431

(1)Represents the nine months ending December 31, 2023.

Leases

Leases

Lessor Arrangements

We lease real estate properties, comprised primarily of office properties and data center shells, to third parties. These leases encompass all, or a portion, of properties, with various expiration dates. Our lease revenue is comprised of: fixed lease revenue, including contractual rent billings under leases recognized on a straight-line basis over lease terms and amortization of lease incentives and above- and below- market lease intangibles; and variable lease revenue, including tenant expense recoveries, lease termination revenue and other revenue from tenants that is not fixed under leases. The table below sets forth our composition of lease revenue recognized between fixed and variable lease revenue (in thousands):

	For the Three Months Ended March 31,
Lease revenue (1)	2023		2022
Fixed	$	116,039	$	111,167
Variable	34,521		30,222
	$	150,560	$	141,389

(1)Excludes lease revenue from discontinued operations of which $1.5 million was fixed and $527,000 was variable for the three months ended March 31, 2022.

Fixed contractual payments due under our property leases were as follows (in thousands):

	As of March 31, 2023
Year Ending December 31,	Operating leases		Sales-type leases
2023 (1)	$	329,700	$	720
2024	415,499		960
2025	332,260		960
2026	263,741		960
2027	228,712		960
Thereafter	1,023,570		2,596
Total contractual payments	$	2,593,482	7,156
Less: Amount representing interest			(1,628)
Net investment in sales-type leases (2)			$	5,528

(1)Represents the nine months ending December 31, 2023.

(2)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

Lessee Arrangements

As of March 31, 2023, our balance sheet included $45.4 million in right-of-use assets associated primarily with land leased from third parties underlying certain properties that we are operating with various expiration dates. Our property right-of-use assets and property lease liabilities on our consolidated balance sheets consisted of the following (in thousands):

Leases	Balance Sheet Location	March 31, 2023		December 31, 2022
Right-of-use assets
Operating leases - Property	Property - operating right-of-use assets	$	42,808	$	37,020
Finance leases - Property	Prepaid expenses and other assets, net	2,621		2,207
Total right-of-use assets		$	45,429	$	39,227
Lease liabilities
Operating leases - Property	Property - operating lease liabilities	$	34,896	$	28,759
Finance leases - Property	Other liabilities	431		—
Total lease liabilities		$	35,327	$	28,759

As of March 31, 2023, our operating leases had a weighted average remaining lease term of 45 years and a weighted average discount rate of 7.34%, while our finance leases had a weighted average remaining lease term of ten years and a weighted average discount rate of 9.14%. The table below presents our total property lease costs (in thousands):

	Statement of Operations Location	For the Three Months Ended March 31,
Lease cost		2023		2022
Operating lease cost
Property leases - fixed	Property operating expenses	$	1,535	$	1,019
Property leases - variable	Property operating expenses	17		16
Finance lease cost
Amortization of property right-of-use assets	Property operating expenses	20		8
Interest on lease liabilities	Interest expense	13		—
		$	1,585	$	1,043

The table below presents the effect of property lease payments on our consolidated statements of cash flows (in thousands):

	For the Three Months Ended March 31,
Supplemental cash flow information	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,185	$	837
Operating cash flows for financing leases	$	13	$	—
Financing cash flows for financing leases	$	4	$	—

Payments on property leases were due as follows (in thousands):

	March 31, 2023
Year Ending December 31,	Operating Leases		Finance Leases
2023 (1)	$	4,863	$	45
2024	6,623		61
2025	2,249		63
2026	1,662		65
2027	1,677		67
Thereafter	130,495		365
Total lease payments	147,569		666
Less: Amount representing interest	(112,673)		(235)
Lease liability	$	34,896	$	431

(1)Represents the nine months ending December 31, 2023.

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Real Estate Joint Ventures

3 Months Ended

Mar. 31, 2023

Equity Method Investments and Joint Ventures [Abstract]

Real Estate Joint Ventures

Real Estate Joint Ventures

Consolidated Real Estate Joint Ventures

The table below sets forth information as of March 31, 2023 pertaining to our investments in consolidated real estate joint ventures, which are each variable interest entities (dollars in thousands):

		Nominal Ownership %		March 31, 2023 (1)
	Date Acquired			Total Assets		Encumbered Assets		Total Liabilities		Mortgage Debt
Entity			Location
LW Redstone Company, LLC (2)	3/23/2010	85%	Huntsville, Alabama	$	633,045	$	94,288	$	114,695	$	51,659
Stevens Investors, LLC	8/11/2015	95%	Washington, DC	168,445		—		2,379		—
M Square Associates, LLC	6/26/2007	50%	College Park, Maryland	101,534		58,856		51,545		49,507
				$	903,024	$	153,144	$	168,619	$	101,166

(1)Excludes amounts eliminated in consolidation.

(2)We fund all capital requirements. Our partner receives distributions of the first $1.2 million of annual operating cash flows and we receive the remainder.

Unconsolidated Real Estate Joint Ventures

The table below sets forth information pertaining to our investments in unconsolidated real estate joint ventures accounted for using the equity method of accounting (dollars in thousands):

	Date Acquired	Nominal Ownership %	Number of Properties	Carrying Value of Investment (1)
Entity				March 31, 2023		December 31, 2022
Redshift JV LLC	1/10/2023	10%	3	$	21,181	$	—
BREIT COPT DC JV LLC	6/20/2019	10%	9	11,331		11,568
Quark JV LLC	12/14/2022	10%	2	6,761		6,758
B RE COPT DC JV III LLC	6/2/2021	10%	2	3,006		3,134
B RE COPT DC JV II LLC (2)	10/30/2020	10%	8	(1,803)		(1,459)
			24	$	40,476	$	20,001

(1)Included $42.3 million and $21.5 million reported in “Investment in unconsolidated real estate joint ventures” as of March 31, 2023 and December 31, 2022, respectively, and $1.8 million and $1.5 million for investments with deficit balances reported in “other liabilities” on our consolidated balance sheets as of March 31, 2023 and December 31, 2022, respectively.

(2)Our investment in B RE COPT DC JV II LLC was lower than our share of the joint venture’s equity by $7.0 million as of March 31, 2023 and December 31, 2022 due to a difference between our cost basis and our share of the joint venture’s underlying equity in its net assets. We recognize adjustments to our share of the joint venture’s earnings and losses resulting from this basis difference in the underlying assets of the joint venture.

As described further in Note 4, on January 10, 2023, we sold a 90% interest in three data center shell properties in Northern Virginia and retained a 10% interest in the properties through Redshift JV LLC, a newly-formed joint venture. We concluded that the joint venture is a variable interest entity. Under the terms of the joint venture agreement, we and our partner receive returns in proportion to our investments, and our maximum exposure to losses is limited to our investment, subject to certain indemnification obligations with respect to nonrecourse debt secured by the properties. The nature of our involvement in the activities of the joint venture does not give us power over decisions that significantly affect its economic performance.

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Investing Receivables

3 Months Ended

Mar. 31, 2023

Receivables [Abstract]

Investing Receivables

Investing Receivables

Investing receivables consisted of the following (in thousands): 

	March 31, 2023		December 31, 2022
Notes receivable from the City of Huntsville	$	70,592	$	69,703
Other investing loans receivable	17,844		17,712
Amortized cost basis	88,436		87,415
Allowance for credit losses	(2,937)		(2,794)
Investing receivables, net	$	85,499	$	84,621

The balances above include accrued interest receivable, net of allowance for credit losses, of $750,000 as of March 31, 2023 and $2.9 million as of December 31, 2022.

Our notes receivable from the City of Huntsville funded infrastructure costs in connection with our LW Redstone Company, LLC joint venture (see Note 6) and carry an interest rate of 9.95%. Our other investing loans receivable as of March 31, 2023 carry interest rates ranging from 12.0% to 14.0% and mature within one year.

The fair value of these receivables was approximately $89 million as of March 31, 2023 and $87 million as of December 31, 2022.

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Debt, Net

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Debt, Net

Debt, Net

Our debt consisted of the following (dollars in thousands):

	Carrying Value (1) as of				March 31, 2023
	March 31, 2023		December 31, 2022
					Stated Interest Rates	Scheduled Maturity
Mortgage and Other Secured Debt:
Fixed rate mortgage debt	$	67,954	$	84,433	3.82% to 4.62% (2)	2024-2026
Variable rate secured debt	33,212		33,318		SOFR + 0.10% + 1.45% to 1.55% (3)	2025-2026
Total mortgage and other secured debt	101,166		117,751
Revolving Credit Facility	118,000		211,000		SOFR + 0.10% + 0.725% to 1.400% (4)	October 2026 (5)
Term Loan Facility	124,034		123,948		SOFR + 0.10% + 0.850% to 1.700% (6)	January 2026 (7)
Unsecured Senior Notes
2.25%, $400,000 aggregate principal	396,805		396,539		2.25% (8)	March 2026
2.00%, $400,000 aggregate principal	397,108		396,988		2.00% (9)	January 2029
2.75%, $600,000 aggregate principal	590,392		590,123		2.75% (10)	April 2031
2.90%, $400,000 aggregate principal	394,951		394,848		2.90% (11)	December 2033
Unsecured note payable	556		597		0% (12)	May 2026
Total debt, net	$	2,123,012	$	2,231,794

(1)The carrying values of our debt other than the Revolving Credit Facility reflect net deferred financing costs of $5.1 million as of March 31, 2023 and $5.4 million as of December 31, 2022.

(2)The weighted average interest rate on our fixed rate mortgage debt was 4.10% as of March 31, 2023.

(3)The weighted average interest rate on our variable rate secured debt as of March 31, 2023 was 6.20%, or 2.45% including the effect of interest rate swaps that hedge the risk of interest rate changes on this debt.

(4)The weighted average interest rate on the Revolving Credit Facility was 5.84% as of March 31, 2023.

(5)The facility matures in October 2026, with the ability for us to extend such maturity by two six-month periods at our option, provided that there is no default under the facility and we pay an extension fee of 0.0625% of the total availability under the facility for each extension period.

(6)The interest rate on this loan was 6.07% as of March 31, 2023.

(7)This facility matures in January 2026, with the ability for us to extend such maturity by two 12-month periods at our option, provided that there is no default under the facility and we pay an extension fee of 0.125% of the outstanding loan balance for each extension period.

(8)The carrying value of these notes reflects an unamortized discount totaling $2.6 million as of March 31, 2023 and $2.8 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.48%.

(9)The carrying value of these notes reflects an unamortized discount totaling $2.1 million as of March 31, 2023 and December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.09%.

(10)The carrying value of these notes reflects an unamortized discount totaling $8.3 million as of March 31, 2023 and $8.5 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.94%.

(11)The carrying value of these notes reflects an unamortized discount totaling $4.1 million as of March 31, 2023 and $4.2 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 3.01%.

(12)This note carries an interest rate that, upon assumption, was below market rates and it therefore was recorded at its fair value based on applicable effective interest rates.  The carrying value of this note reflects an unamortized discount totaling $55,000 as of March 31, 2023 and $65,000 as of December 31, 2022.

All debt is owed by the Operating Partnership. While COPT is not directly obligated by any debt, it has guaranteed COPLP’s Revolving Credit Facility, Term Loan Facility and Unsecured Senior Notes.

Certain of our debt instruments require that we comply with a number of restrictive financial covenants.  As of March 31, 2023, we were compliant with these financial covenants.

Our debt matures on the following schedule (in thousands):

Year Ending December 31,	March 31, 2023
2023 (1)	$	2,262
2024	29,983
2025	23,717
2026	689,300
2027	—
Thereafter	1,400,000
Total	$	2,145,262	(2)

(1)Represents the nine months ending December 31, 2023.

(2)Represents scheduled principal amortization and maturities only and therefore excludes net discounts and deferred financing costs of $22.3 million.

We capitalized interest costs of $770,000 in the three months ended March 31, 2023 and $1.5 million in the three months ended March 31, 2022.

The following table sets forth information pertaining to the fair value of our debt (in thousands): 

	March 31, 2023				December 31, 2022
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Fixed-rate debt
Unsecured Senior Notes	$	1,779,256	$	1,436,838	$	1,778,498	$	1,433,561
Other fixed-rate debt	68,510		64,120		85,030		80,330
Variable-rate debt	275,246		274,551		368,266		367,896
	$	2,123,012	$	1,775,509	$	2,231,794	$	1,881,787

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Interest Rate Derivatives

3 Months Ended

Mar. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Interest Rate Derivatives

Interest Rate Derivatives

The following table sets forth the key terms and fair values of our interest rate swap derivatives (dollars in thousands):

							Fair Value at
Notional Amount			Fixed Rate	Floating Rate Index	Effective Date	Expiration Date	March 31, 2023		December 31, 2022
$	10,820	(1)	1.678%	SOFR + 0.10%	8/1/2019	8/1/2026	$	654	$	806
$	22,700	(2)	0.573%	SOFR + 0.10%	4/1/2020	3/26/2025	1,525		1,825
$	150,000		3.742%	One-Month SOFR	2/1/2023	2/2/2026	(262)		—
$	50,000		3.747%	One-Month SOFR	2/1/2023	2/2/2026	(93)		—
							$	1,824	$	2,631

(1)The notional amount of this instrument is scheduled to amortize to $10.0 million.

(2)The notional amount of this instrument is scheduled to amortize to $22.1 million.

Each of these swaps was designated as a cash flow hedge of interest rate risk.

The table below sets forth the fair value of our interest rate derivatives as well as their classification on our consolidated balance sheets (in thousands):

		Fair Value at
Derivatives	Balance Sheet Location	March 31, 2023		December 31, 2022
Interest rate swaps designated as cash flow hedges	Prepaid expenses and other assets, net	$	2,179	$	2,631
Interest rate swaps designated as cash flow hedges	Other liabilities	$	(355)	$	—

The table below presents the effect of our interest rate derivatives on our consolidated statements of operations and comprehensive income (in thousands):

	Amount of (Loss) Income Recognized in AOCI on Derivatives				Amount of Income (Loss) Reclassified from AOCI into Interest Expense on Statement of Operations
Derivatives in Hedging Relationships	For the Three Months Ended March 31,				For the Three Months Ended March 31,
	2023		2022		2023		2022
Interest rate derivatives	$	(215)	$	2,537	$	591	$	(1,003)

Based on the fair value of our derivatives as of March 31, 2023, we estimate that approximately $2.9 million of gains will be reclassified from accumulated other comprehensive income (“ AOCI”) as a decrease to interest expense over the next 12 months.

We have agreements with each of our interest rate derivative counterparties that contain provisions under which, if we default or are capable of being declared in default on defined levels of our indebtedness, we could also be declared in default on our derivative obligations. Failure to comply with the loan covenant provisions could result in our being declared in default on any derivative instrument obligations covered by the agreements. As of March 31, 2023, we were not in default with any of these provisions. As of March 31, 2023, the fair value of interest rate derivatives in a net liability position related to these agreements was $219,000, including accrued interest and excluding credit valuation adjustments, and we had not posted any collateral related to these agreements; if we breach any of these provisions, we could be required to settle our obligations under these agreements for this amount.

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Redeemable Noncontrolling Interests

3 Months Ended

Mar. 31, 2023

Noncontrolling Interest [Abstract]

Redeemable Noncontrolling Interests

Redeemable Noncontrolling Interests

Our partners in two real estate joint ventures, LW Redstone Company, LLC and Stevens Investors, LLC, have the right to require us to acquire their respective interests at fair value; accordingly, we classify our partners’ interests as redeemable noncontrolling interests in the mezzanine section of our consolidated balance sheets. The table below sets forth the activity for these redeemable noncontrolling interests (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	26,293	$	26,898
Distributions to noncontrolling interests	(763)		(606)
Net income attributable to noncontrolling interests	699		567
Adjustments for changes in fair value of interests	(781)		(39)
Ending balance	$	25,448	$	26,820

We determine the fair value of the interests based on unobservable inputs after considering the assumptions that market participants would make in pricing the interest. We apply a discount rate to the estimated future cash flows allocable to our partners from the properties underlying the respective joint ventures. Estimated cash flows used in such analyses are based on our plans for the properties and our views of market and economic conditions, and consider items such as current and future rental rates, occupancy projections and estimated operating and development expenditures.

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Equity

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Equity

Equity

As of March 31, 2023, we had remaining capacity under our at-the-market stock offering program equal to an aggregate gross sales price of $300 million in common shares.

We declared dividends per common share of $0.285 in the three months ended March 31, 2023 and $0.275 in the three months ended March 31, 2022.

See Note 15 for disclosure of common share activity pertaining to our share-based compensation plans.

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Information by Business Segment

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Information by Business Segment

Information by Business SegmentWe have the following reportable segments: Defense/IT Locations; Regional Office; Wholesale Data Center (the only property in which we sold on January 25, 2022); and Other. We also report on Defense/IT Locations sub-segments, which include the following: Fort George G. Meade and the Baltimore/Washington Corridor (“Fort Meade/BW Corridor”); Northern Virginia Defense/IT Locations (“NoVA Defense/IT”); Lackland Air Force Base (in San Antonio); locations serving the U.S. Navy (“Navy Support”), which included properties proximate to the Washington Navy Yard, the Naval Air Station Patuxent River in Maryland and the Naval Surface Warfare Center Dahlgren Division in Virginia; Redstone Arsenal (in Huntsville); and data center shells (properties leased to tenants to be operated as data centers in which the tenants fund the costs for the power, fiber connectivity and data center infrastructure). We measure the performance of our segments through the measure we define as net operating income from real estate operations (“NOI from real estate operations”), which includes: real estate revenues and property operating expenses; and the net of revenues and property operating expenses of real estate operations owned through unconsolidated real estate joint ventures (“UJVs”) that is allocable to our ownership interest (“UJV NOI allocable to COPT”). Amounts reported for segment assets represent long-lived assets associated with consolidated operating properties (including the carrying value of properties, right-of-use assets, net of related lease liabilities, intangible assets, deferred leasing costs, deferred rents receivable and lease incentives) and the carrying value of investments in UJVs owning operating properties. Amounts reported as additions to long-lived assets represent additions to existing consolidated operating properties, excluding transfers from non-operating properties, which we report separately.

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

	Defense/IT Locations
	Fort Meade/BW Corridor		NoVA Defense/IT		Lackland Air Force Base		Navy Support		Redstone Arsenal		Data Center Shells		Total Defense/IT Locations		Regional Office		Wholesale Data Center		Other		Total
Three Months Ended March 31, 2023
Revenues from real estate operations	$	69,777	$	19,829	$	15,605	$	7,925	$	13,414	$	6,692	$	133,242	$	16,054	$	—	$	2,385	$	151,681
Property operating expenses	(24,520)		(7,572)		(7,945)		(3,543)		(4,636)		(594)		(48,810)		(8,851)		—		(1,759)		(59,420)
UJV NOI allocable to COPT	—		—		—		—		—		1,642		1,642		—		—		—		1,642
NOI from real estate operations	$	45,257	$	12,257	$	7,660	$	4,382	$	8,778	$	7,740	$	86,074	$	7,203	$	—	$	626	$	93,903
Additions to long-lived assets	$	12,135	$	2,398	$	62	$	759	$	6,594	$	—	$	21,948	$	3,278	$	—	$	11	$	25,237
Transfers from non-operating properties	$	5,781	$	238	$	28	$	2,650	$	14,392	$	3,311	$	26,400	$	13	$	—	$	—	$	26,413
Segment assets at March 31, 2023	$	1,390,273	$	486,649	$	193,160	$	169,235	$	472,237	$	324,422	$	3,035,976	$	545,817	$	—	$	3,321	$	3,585,114
Three Months Ended March 31, 2022
Revenues from real estate operations	$	67,214	$	18,576	$	14,713	$	8,169	$	9,195	$	7,505	$	125,372	$	15,082	$	1,980	$	1,826	$	144,260
Property operating expenses	(25,784)		(6,869)		(7,072)		(3,471)		(3,735)		(1,010)		(47,941)		(7,930)		(1,025)		(1,256)		(58,152)
UJV NOI allocable to COPT	—		—		—		—		—		1,080		1,080		—		—		—		1,080
NOI from real estate operations	$	41,430	$	11,707	$	7,641	$	4,698	$	5,460	$	7,575	$	78,511	$	7,152	$	955	$	570	$	87,188
Additions to long-lived assets	$	11,785	$	2,189	$	—	$	740	$	235	$	—	$	14,949	$	4,333	$	(51)	$	1	$	19,232
Transfers from non-operating properties	$	5,369	$	319	$	418	$	6,376	$	76	$	81,203	$	93,761	$	271	$	—	$	—	$	94,032
Segment assets at March 31, 2022	$	1,334,119	$	488,479	$	197,406	$	175,176	$	297,974	$	430,447	$	2,923,601	$	536,909	$	—	$	3,901	$	3,464,411

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

	For the Three Months Ended March 31,
	2023		2022
Segment revenues from real estate operations	$	151,681	$	144,260
Construction contract and other service revenues	15,820		53,200
Less: Revenues from discontinued operations	—		(1,980)
Total revenues	$	167,501	$	195,480

The following table reconciles our segment property operating expenses to property operating expenses as reported on our consolidated statements of operations (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Segment property operating expenses	$	59,420	$	58,152
Less: Property operating expenses from discontinued operations	—		(971)
Total property operating expenses	$	59,420	$	57,181

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

	For the Three Months Ended March 31,
	2023		2022
UJV NOI allocable to COPT	$	1,642	$	1,080
Less: Income from UJV allocable to COPT attributable to depreciation and amortization expense and interest expense	(1,704)		(758)
Add: Equity in (loss) income of unconsolidated non-real estate entities	(2)		566
Equity in (loss) income of unconsolidated entities	$	(64)	$	888

As previously discussed, we provide real estate services such as property management, development and construction services primarily for our properties but also for third parties.  The primary manner in which we evaluate the operating performance of our service activities is through a measure we define as net operating income from service operations (“NOI from service operations”), which is based on the net of revenues and expenses from these activities.  Construction contract and other service revenues and expenses consist primarily of subcontracted costs that are reimbursed to us by the customer along with a management fee. The operating margins from these activities are small relative to the revenue.  We believe NOI from service operations is a useful measure in assessing both our level of activity and our profitability in conducting such operations. The table below sets forth the computation of our NOI from service operations (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract and other service revenues	$	15,820	$	53,200
Construction contract and other service expenses	(15,201)		(51,650)
NOI from service operations	$	619	$	1,550

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

	For the Three Months Ended March 31,
	2023		2022
NOI from real estate operations	$	93,903	$	87,188
NOI from service operations	619		1,550
Depreciation and other amortization associated with real estate operations	(36,995)		(34,264)
General, administrative and leasing expenses	(9,995)		(8,544)
Business development expenses and land carry costs	(495)		(783)
Interest expense	(16,442)		(14,424)
Interest and other income	2,323		1,893
Credit loss (expense) recoveries	(67)		316
Gain on sales of real estate	49,378		15
Loss on early extinguishment of debt	—		(342)
Equity in (loss) income of unconsolidated entities	(64)		888
UJV NOI allocable to COPT included in equity in (loss) income of unconsolidated entities	(1,642)		(1,080)
Income tax expense	(125)		(153)
Revenues from real estate operations from discontinued operations	—		(1,980)
Property operating expenses from discontinued operations	—		971
Income from continuing operations	$	80,398	$	31,251

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

	March 31, 2023		March 31, 2022
Segment assets	$	3,585,114	$	3,464,411
Operating properties lease liabilities included in segment assets	35,327		29,729
Non-operating property assets	345,518		419,346
Other assets	212,033		218,540
Total consolidated assets	$	4,177,992	$	4,132,026

The accounting policies of the segments are the same as those used to prepare our consolidated financial statements, except that discontinued operations are not presented separately for segment purposes.  In the segment reporting presented above, we did not allocate interest expense, depreciation and amortization, gain on sales of real estate, loss on early extinguishment of debt and equity in (loss) income of unconsolidated entities not included in NOI to our real estate segments since they are not included in the measure of segment profit reviewed by management.  We also did not allocate general, administrative and leasing expenses, business development expenses and land carry costs, interest and other income, credit loss (expense) recoveries, income taxes and noncontrolling interests because these items represent general corporate or non-operating property items not attributable to segments.

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Construction Contract and Other Service Revenues

3 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Construction Contract and Other Service Revenues

Construction Contract and Other Service Revenues

We disaggregate our construction contract and other service revenues by compensation arrangement and by service type as we believe it best depicts the nature, timing and uncertainty of our revenue. The table below reports construction contract and other service revenues by compensation arrangement (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract revenue:
Guaranteed maximum price	$	6,743	$	47,923
Firm fixed price	5,879		3,444
Cost-plus fee	2,709		1,306
Other	489		527
	$	15,820	$	53,200

The table below reports construction contract and other service revenues by service type (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract revenue:
Construction	$	14,725	$	52,569
Design	606		104
Other	489		527
	$	15,820	$	53,200

We recognized an insignificant amount of revenue in the three months ended March 31, 2023 and 2022 from performance obligations satisfied (or partially satisfied) in previous periods.

Accounts receivable related to our construction contract services is included in accounts receivable, net on our consolidated balance sheets. The beginning and ending balances of accounts receivable related to our construction contracts were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	7,618	$	7,193
Ending balance	$	6,786	$	4,165

Contract assets are included in prepaid expenses and other assets, net on our consolidated balance sheets. The beginning and ending balances of our contract assets were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	22,331	$	22,384
Ending balance	$	20,619	$	29,389

Contract liabilities are included in other liabilities on our consolidated balance sheets. Changes in contract liabilities were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	2,867	$	2,499
Ending balance	$	3,399	$	2,534
Portion of beginning balance recognized in revenue during period	$	77	$	26

Revenue allocated to the remaining performance obligations under existing contracts as of March 31, 2023 that will be recognized as revenue in future periods was $61.5 million, of which we expect to recognize approximately $50 million in the nine months ending December 31, 2023 and the remainder in 2024.

We have no deferred incremental costs incurred to obtain or fulfill our construction contracts or other service revenues as of March 31, 2023 and December 31, 2022. We had credit loss recoveries on construction contracts receivable and unbilled construction revenue of $65,000 in the three months ended March 31, 2023 and $372,000 in the three months ended March 31, 2022.

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Credit Losses on Financial Assets and Other Instruments

3 Months Ended

Mar. 31, 2023

Credit Loss [Abstract]

Credit Losses on Financial Assets and Other Instruments

Credit Losses on Financial Assets and Other Instruments

The table below sets forth the activity for our allowance for credit losses for the three months ended March 31, 2023 and 2022 (in thousands):

	Investing Receivables		Tenant Notes Receivable (1)		Other Assets (2)		Total
December 31, 2022	$	2,794	$	778	$	268	$	3,840
Credit loss expense (recoveries)	143		(19)		(57)		67
Write-offs	—		(33)		—		(33)
March 31, 2023	$	2,937	$	726	$	211	$	3,874
December 31, 2021	$	1,599	$	1,057	$	913	$	3,569
Credit loss expense (recoveries)	77		(34)		(359)		(316)
March 31, 2022	$	1,676	$	1,023	$	554	$	3,253

(1)Included in the line entitled “accounts receivable, net” on our consolidated balance sheets.

(2)The balance as of March 31, 2023 was included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet. The balance as of December 31, 2022 included $52,000 in the line entitled “accounts receivable, net” and $216,000 in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

The following table presents the amortized cost basis of our investing receivables, tenant notes receivable and sales-type lease receivables by credit risk classification, by origination year as of March 31, 2023 (in thousands):

	Origination Year
	2018 and Earlier		2019		2020		2021		2022		2023		Total
Investing receivables:
Credit risk classification:
Investment grade	$	61,092	$	—	$	1,931	$	7,569	$	—	$	—	$	70,592
Non-investment grade	—		—		—		—		17,844		—		17,844
Total	$	61,092	$	—	$	1,931	$	7,569	$	17,844	$	—	$	88,436
Tenant notes receivable:
Credit risk classification:
Investment grade	$	772	$	34	$	176	$	—	$	—	$	—	$	982
Non-investment grade	193		78		1,532		—		—		—		1,803
Total	$	965	$	112	$	1,708	$	—	$	—	$	—	$	2,785
Gross write-offs during the three months ended March 31, 2023	$	33	$	—	$	—	$	—	$	—	$	—	$	33
Sales-type lease receivables:
Credit risk classification:
Investment grade	$	—	$	—	$	5,528	$	—	$	—	$	—	$	5,528

Our investment grade credit risk classification represents entities with investment grade credit ratings from ratings agencies (such as S&P Global Ratings, Moody’s Investors Service, Inc. or Fitch Ratings, Inc.), meaning that they are considered to have at least an adequate capacity to meet their financial commitments, with credit risk ranging from minimal to moderate. Our non-investment grade credit risk classification represents entities with either no credit agency credit ratings or ratings deemed to be sub-investment grade; we believe that there is significantly more credit risk associated with this classification. The credit risk classifications of our investing receivables and tenant notes receivable were last updated in March 2023.

An insignificant portion of the investing and tenant notes receivables set forth above was past due, which we define as being delinquent by more than three months from the due date.

Notes receivable on nonaccrual status as of March 31, 2023 and December 31, 2022 were not significant. We did not recognize any interest income on notes receivable on nonaccrual status during the three months ended March 31, 2023 and 2022.

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Share-Based Compensation

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation

Share-Based Compensation

Restricted Shares

The following table summarizes restricted share activity under our share-based compensation plans for the three months ended March 31, 2023:

	Number of Shares	Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022	325,083	$	26.27
Granted	158,242	$	25.72
Forfeited	(24,510)	$	25.89
Vested	(124,838)	$	26.02
Unvested as of March 31, 2023	333,977	$	26.13

Restricted shares granted to employees vest based on increments and over periods of time set forth under the terms of the respective awards provided that the employee remains employed by us. Restricted shares granted to non-employee Trustees vest on the first anniversary of the grant date, provided that the Trustee remains in his or her position.

The aggregate intrinsic value of restricted shares that vested was $3.2 million for the three months ended March 31, 2023.

Profit Interest Units in COPLP (“PIUs”)

We granted two forms of PIUs: time-based PIUs (“TB-PIUs”); and performance-based PIUs (“PB-PIUs”). TB-PIUs are subject to forfeiture restrictions until the end of the requisite service period, at which time the TB-PIUs automatically convert into vested PIUs. PB-PIUs are subject to a market condition in that the number of earned awards are determined at the end of the performance period (as described further below) and then settled in vested PIUs. Vested PIUs carry substantially the same rights to redemption and distributions as non-PIU common units.

TB-PIUs

The following table summarizes TB-PIUs activity under our share-based compensation plans for the three months ended March 31, 2023:

	Number of TB-PIUs	Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022	187,330	$	26.19
Granted	82,334	$	25.72
Forfeited	(27,182)	$	26.46
Vested	(73,869)	$	26.07
Unvested as of March 31, 2023	168,613	$	25.97

TB-PIUs granted to senior management team members vest based on increments and over periods of time set forth under the terms of the respective awards provided that the employee remains employed by us. TB-PIUs granted to non-employee Trustees vest on the first anniversary of the grant date, provided that the Trustee remains in his or her position.

The aggregate intrinsic value of TB-PIUs that vested was $1.9 million for the three months ended March 31, 2023.

PB-PIUs

On January 1, 2023, we granted certain senior management team members 275,402 PB-PIUs with a three-year performance period concluding on the earlier of December 31, 2025 or the date of: (1) termination by us without cause, death or disability of the employee or constructive discharge of the employee (collectively, “qualified termination”); or (2) a sale event.  The number of earned awards at the end of the performance period will be determined based on the percentile rank of COPT’s total shareholder return (“TSR”) relative to a peer group of companies, as set forth in the following schedule:

Percentile Rank	Earned PB-PIUs Payout %
75th or greater	100% of PB-PIUs granted
50th (target)	50% of PB-PIUs granted
25th	25% of PB-PIUs granted
Below 25th	0% of PB-PIUs granted

If the percentile rank exceeds the 25th percentile and is between two of the percentile ranks set forth in the table above, then the percentage of the earned awards will be interpolated between the ranges set forth in the table above to reflect any performance between the listed percentiles.  If COPT’s TSR during the measurement period is negative, the maximum number of earned awards will be limited to the target level payout percentage.  During the performance period, PB-PIUs carry rights to distributions equal to 10% of the distribution rights of non-PIU common units but carry no redemption rights.

At the end of the performance period, we will settle the award by issuing vested PIUs equal to: the number of earned awards; and the excess, if any, of (1) the aggregate distributions that would have been paid with respect to vested PIUs issued in settlement of the earned awards through the date of settlement had such vested PIUs been issued on the grant date over (2) the aggregate distributions made on the PB-PIUs during the performance period, divided by the price of our common shares on the settlement date. If a performance period ends due to a sale event or qualified termination, the number of earned awards is prorated based on the portion of the three-year performance period that has elapsed.  If employment is terminated by the employee or by us for cause, all PB-PIUs are forfeited.

These PB-PIU grants had an aggregate grant date fair value of $4.3 million ($31.54 per target-level award associated with the grants) which is being recognized over the performance period. The grant date fair value was computed using a Monte Carlo model that included the following assumptions: baseline common share value of $25.94; expected volatility for common shares of 35.0%; and a risk-free interest rate of 4.28%.  

During the three months ended March 31, 2023, 126,890 PB-PIUs were forfeited; these PB-PIUs had a weighted average grant date fair value per target-level award of $31.49.

Based on COPT’s TSR relative to its peer group of companies, for the 2020 PB-PIUs issued to executives that vested on December 31, 2022, we issued 141,152 PIUs in settlement of the PB-PIUs on February 1, 2023.

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Earnings Per Share ("EPS")

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Earnings Per Share (“EPS”)

Earnings Per Share (“EPS”)

We present both basic and diluted EPS.  We compute basic EPS by dividing net income available to common shareholders allocable to unrestricted common shares under the two-class method by the weighted average number of unrestricted common shares outstanding during the period.  Our computation of diluted EPS is similar except that:

•the denominator is increased to include: (1) the weighted average number of potential additional common shares that would have been outstanding if securities that are convertible into common shares were converted; and (2) the effect of dilutive potential common shares outstanding during the period attributable to redeemable noncontrolling interests and share-based compensation awards using the if-converted or treasury stock methods; and

•the numerator is adjusted to add back any changes in income or loss that would result from the assumed conversion into common shares that we add to the denominator.

Summaries of the numerator and denominator for purposes of basic and diluted EPS calculations are set forth below (in thousands, except per share data):

	For the Three Months Ended March 31,
	2023		2022
Numerator:
Income from continuing operations	$	80,398	$	31,251
Income from continuing operations attributable to noncontrolling interests	(1,619)		(1,084)
Income from continuing operations attributable to share-based compensation awards for basic EPS	(297)		(116)
Numerator for basic EPS from continuing operations attributable to common shareholders	78,482		30,051
Redeemable noncontrolling interests	(64)		(39)
Adjustment to income from continuing operations attributable to share-based compensation awards for diluted EPS	49		18
Numerator for diluted EPS from continuing operations attributable to common shareholders	78,467		30,030
Discontinued operations	—		29,573
Discontinued operations attributable to noncontrolling interests	—		(421)
Income from discontinued operations attributable to share-based compensation awards for diluted EPS	—		(83)
Numerator for diluted EPS on net income attributable to common shareholders	$	78,467	$	59,099
Denominator (all weighted averages):
Denominator for basic EPS (common shares)	112,127		112,020
Dilutive effect of redeemable noncontrolling interests	91		132
Dilutive effect of share-based compensation awards	410		426
Denominator for diluted EPS (common shares)	112,628		112,578
Basic EPS attributable to common shareholders:
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.26
Net income	$	0.70	$	0.53
Diluted EPS attributable to common shareholders:
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.25
Net income	$	0.70	$	0.52

Our diluted EPS computations do not include the effects of the following securities since the conversions of such securities would increase diluted EPS for the respective periods (in thousands):

	Weighted Average Shares Excluded from Denominator
	For the Three Months Ended March 31,
	2023	2022
Conversion of common units	1,489	1,384
Conversion of redeemable noncontrolling interests	972	806

The following securities were also excluded from the computation of diluted EPS because their effect was antidilutive:

•weighted average restricted shares and deferred share awards for the three months ended March 31, 2023 and 2022 of 398,000 and 399,000, respectively;

•weighted average TB-PIUs for the three months ended March 31, 2023 and 2022 of 181,000 and 172,000, respectively; and

•weighted average vested PIUs for the three months ended March 31, 2023 of 103,000.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Litigation and Claims

In the normal course of business, we are subject to legal actions and other claims.  We record losses for specific legal proceedings and claims when we determine that a loss is probable and the amount of loss can be reasonably estimated.  As of March 31, 2023, management believes that it is reasonably possible that we could recognize a loss of up to $4.1 million for certain municipal tax claims; while we do not believe this loss would materially affect our financial position or liquidity, it could be material to our results of operations. Management believes that it is also reasonably possible that we could incur losses pursuant to other claims but do not believe such losses would materially affect our financial position, liquidity or results of operations. Our assessment of the potential outcomes of these matters involves significant judgment and is subject to change based on future developments.

Environmental

We are subject to various federal, state and local environmental regulations related to our property ownership and operations.  We have performed environmental assessments of our properties, the results of which have not revealed any environmental liability that we believe would have a materially adverse effect on our financial position, operations or liquidity.

In connection with a lease and subsequent sale in 2008 and 2010 of three properties in Dayton, New Jersey, we agreed to provide certain environmental indemnifications limited to $19 million in the aggregate. We have insurance coverage in place to mitigate most of any potential future losses that may result from these indemnification agreements.

Tax Incremental Financing Obligation

Anne Arundel County, Maryland issued tax incremental financing bonds to third-party investors in order to finance public improvements needed in connection with our project known as the National Business Park.  These bonds had a remaining principal balance of approximately $29 million as of March 31, 2023. The real estate taxes on increases in assessed values post-bond issuance of properties in development districts encompassing the National Business Park are transferred to a special fund pledged to the repayment of the bonds. While we are obligated to fund, through a special tax, any future shortfalls between debt service of the bonds and real estate taxes available to repay the bonds, as of March 31, 2023, we do not expect any such future fundings will be required.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

These consolidated financial statements include the accounts of COPT, the Operating Partnership, their subsidiaries and other entities in which COPT has a majority voting interest and control.  We also consolidate certain entities when control of such entities can be achieved through means other than voting rights (“variable interest entities” or “VIEs”) if we are deemed to be the primary beneficiary of such entities.  We eliminate all intercompany balances and transactions in consolidation.

We use the equity method of accounting when we own an interest in an entity and can exert significant influence over but cannot control the entity’s operations. We discontinue equity method accounting if our investment in an entity (and net advances) is reduced to zero unless we have guaranteed obligations of the entity or are otherwise committed to provide further financial support for the entity.

When we own an equity investment in an entity and cannot exert significant influence over its operations, we measure the investment at fair value, with changes recognized through net income. For an investment without a readily determinable fair value, we measure the investment at cost, less any impairments, plus or minus changes resulting from observable price changes for an identical or similar investment of the same issuer.

These interim financial statements should be read together with the consolidated financial statements and notes thereto as of and for the year ended December 31, 2022 included in our 2022 Annual Report on Form 10-K.  The unaudited consolidated financial statements include all adjustments that are necessary, in the opinion of management, to fairly state our financial position and results of operations.  All adjustments are of a normal recurring nature.  The consolidated financial statements have been prepared using the accounting policies described in our 2022 Annual Report on Form 10-K.

Reclassifications

Reclassifications

We reclassified certain amounts from prior periods to conform to the current period presentation of our consolidated financial statements with no effect on previously reported net income or equity.

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of fair value assets and liabilities measured on recurring basis

The table below sets forth our financial assets and liabilities accounted for at fair value on a recurring basis as of March 31, 2023 and the hierarchy level of inputs used in measuring their respective fair values under applicable accounting standards (in thousands):

Description	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable  Inputs (Level 3)		Total
Assets: (1)
Marketable securities in deferred compensation plan
Mutual funds	$	1,831	$	—	$	—	$	1,831
Other	44		—		—		44
Interest rate derivatives	—		2,179		—		2,179
Total assets	$	1,875	$	2,179	$	—	$	4,054
Liabilities: (2)
Deferred compensation plan liability	$	—	$	1,875	$	—	$	1,875
Interest rate derivatives	—		355		—		355
Total liabilities	$	—	$	2,230	$	—	$	2,230

(1)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

(2)Included in the line entitled “other liabilities” on our consolidated balance sheet.

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Properties, Net (Tables)

3 Months Ended

Mar. 31, 2023

Real Estate [Abstract]

Schedule of operating properties, net

Operating properties, net consisted of the following (in thousands): 

	March 31, 2023		December 31, 2022
Land	$	540,037	$	539,809
Buildings and improvements	4,033,266		3,986,524
Less: Accumulated depreciation	(1,300,430)		(1,267,434)
Operating properties, net	$	3,272,873	$	3,258,899

Disclosure of Long-Lived Assets Held-for-sale

The table below sets forth the components of the properties’ assets, which were classified as held for sale on our consolidated balance sheet as of December 31, 2022 (in thousands):

Properties, net	$	156,691
Deferred rent receivable	4,595
Assets held for sale, net	$	161,286

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Leases (Tables)

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

Operating lease revenue recognized

The table below sets forth our composition of lease revenue recognized between fixed and variable lease revenue (in thousands):

	For the Three Months Ended March 31,
Lease revenue (1)	2023		2022
Fixed	$	116,039	$	111,167
Variable	34,521		30,222
	$	150,560	$	141,389

(1)Excludes lease revenue from discontinued operations of which $1.5 million was fixed and $527,000 was variable for the three months ended March 31, 2022.

Sales-type leases fixed contractual payments due

Fixed contractual payments due under our property leases were as follows (in thousands):

	As of March 31, 2023
Year Ending December 31,	Operating leases		Sales-type leases
2023 (1)	$	329,700	$	720
2024	415,499		960
2025	332,260		960
2026	263,741		960
2027	228,712		960
Thereafter	1,023,570		2,596
Total contractual payments	$	2,593,482	7,156
Less: Amount representing interest			(1,628)
Net investment in sales-type leases (2)			$	5,528

(1)Represents the nine months ending December 31, 2023.

(2)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

Operating leases fixed contractual payments due

Fixed contractual payments due under our property leases were as follows (in thousands):

	As of March 31, 2023
Year Ending December 31,	Operating leases		Sales-type leases
2023 (1)	$	329,700	$	720
2024	415,499		960
2025	332,260		960
2026	263,741		960
2027	228,712		960
Thereafter	1,023,570		2,596
Total contractual payments	$	2,593,482	7,156
Less: Amount representing interest			(1,628)
Net investment in sales-type leases (2)			$	5,528

(1)Represents the nine months ending December 31, 2023.

(2)Included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

Right-of-use assets and lease liabilities

Our property right-of-use assets and property lease liabilities on our consolidated balance sheets consisted of the following (in thousands):

Leases	Balance Sheet Location	March 31, 2023		December 31, 2022
Right-of-use assets
Operating leases - Property	Property - operating right-of-use assets	$	42,808	$	37,020
Finance leases - Property	Prepaid expenses and other assets, net	2,621		2,207
Total right-of-use assets		$	45,429	$	39,227
Lease liabilities
Operating leases - Property	Property - operating lease liabilities	$	34,896	$	28,759
Finance leases - Property	Other liabilities	431		—
Total lease liabilities		$	35,327	$	28,759

Lease costs

The table below presents our total property lease costs (in thousands):

	Statement of Operations Location	For the Three Months Ended March 31,
Lease cost		2023		2022
Operating lease cost
Property leases - fixed	Property operating expenses	$	1,535	$	1,019
Property leases - variable	Property operating expenses	17		16
Finance lease cost
Amortization of property right-of-use assets	Property operating expenses	20		8
Interest on lease liabilities	Interest expense	13		—
		$	1,585	$	1,043

The table below presents the effect of property lease payments on our consolidated statements of cash flows (in thousands):

	For the Three Months Ended March 31,
Supplemental cash flow information	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,185	$	837
Operating cash flows for financing leases	$	13	$	—
Financing cash flows for financing leases	$	4	$	—

Operating lease, liability, maturity

Payments on property leases were due as follows (in thousands):

	March 31, 2023
Year Ending December 31,	Operating Leases		Finance Leases
2023 (1)	$	4,863	$	45
2024	6,623		61
2025	2,249		63
2026	1,662		65
2027	1,677		67
Thereafter	130,495		365
Total lease payments	147,569		666
Less: Amount representing interest	(112,673)		(235)
Lease liability	$	34,896	$	431

(1)Represents the nine months ending December 31, 2023.

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Real Estate Joint Ventures (Tables)

3 Months Ended

Mar. 31, 2023

Equity Method Investments and Joint Ventures [Abstract]

Schedule of information related to investments in consolidated real estate joint ventures

The table below sets forth information as of March 31, 2023 pertaining to our investments in consolidated real estate joint ventures, which are each variable interest entities (dollars in thousands):

		Nominal Ownership %		March 31, 2023 (1)
	Date Acquired			Total Assets		Encumbered Assets		Total Liabilities		Mortgage Debt
Entity			Location
LW Redstone Company, LLC (2)	3/23/2010	85%	Huntsville, Alabama	$	633,045	$	94,288	$	114,695	$	51,659
Stevens Investors, LLC	8/11/2015	95%	Washington, DC	168,445		—		2,379		—
M Square Associates, LLC	6/26/2007	50%	College Park, Maryland	101,534		58,856		51,545		49,507
				$	903,024	$	153,144	$	168,619	$	101,166

(1)Excludes amounts eliminated in consolidation.

(2)We fund all capital requirements. Our partner receives distributions of the first $1.2 million of annual operating cash flows and we receive the remainder.

Schedule of information related to investments in unconsolidated real estate joint ventures

The table below sets forth information pertaining to our investments in unconsolidated real estate joint ventures accounted for using the equity method of accounting (dollars in thousands):

	Date Acquired	Nominal Ownership %	Number of Properties	Carrying Value of Investment (1)
Entity				March 31, 2023		December 31, 2022
Redshift JV LLC	1/10/2023	10%	3	$	21,181	$	—
BREIT COPT DC JV LLC	6/20/2019	10%	9	11,331		11,568
Quark JV LLC	12/14/2022	10%	2	6,761		6,758
B RE COPT DC JV III LLC	6/2/2021	10%	2	3,006		3,134
B RE COPT DC JV II LLC (2)	10/30/2020	10%	8	(1,803)		(1,459)
			24	$	40,476	$	20,001

(1)Included $42.3 million and $21.5 million reported in “Investment in unconsolidated real estate joint ventures” as of March 31, 2023 and December 31, 2022, respectively, and $1.8 million and $1.5 million for investments with deficit balances reported in “other liabilities” on our consolidated balance sheets as of March 31, 2023 and December 31, 2022, respectively.

(2)Our investment in B RE COPT DC JV II LLC was lower than our share of the joint venture’s equity by $7.0 million as of March 31, 2023 and December 31, 2022 due to a difference between our cost basis and our share of the joint venture’s underlying equity in its net assets. We recognize adjustments to our share of the joint venture’s earnings and losses resulting from this basis difference in the underlying assets of the joint venture.

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Investing Receivables (Tables)

3 Months Ended

Mar. 31, 2023

Receivables [Abstract]

Schedule of investing receivables

Investing receivables consisted of the following (in thousands): 

	March 31, 2023		December 31, 2022
Notes receivable from the City of Huntsville	$	70,592	$	69,703
Other investing loans receivable	17,844		17,712
Amortized cost basis	88,436		87,415
Allowance for credit losses	(2,937)		(2,794)
Investing receivables, net	$	85,499	$	84,621

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Debt, Net (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Schedule of debt

Our debt consisted of the following (dollars in thousands):

	Carrying Value (1) as of				March 31, 2023
	March 31, 2023		December 31, 2022
					Stated Interest Rates	Scheduled Maturity
Mortgage and Other Secured Debt:
Fixed rate mortgage debt	$	67,954	$	84,433	3.82% to 4.62% (2)	2024-2026
Variable rate secured debt	33,212		33,318		SOFR + 0.10% + 1.45% to 1.55% (3)	2025-2026
Total mortgage and other secured debt	101,166		117,751
Revolving Credit Facility	118,000		211,000		SOFR + 0.10% + 0.725% to 1.400% (4)	October 2026 (5)
Term Loan Facility	124,034		123,948		SOFR + 0.10% + 0.850% to 1.700% (6)	January 2026 (7)
Unsecured Senior Notes
2.25%, $400,000 aggregate principal	396,805		396,539		2.25% (8)	March 2026
2.00%, $400,000 aggregate principal	397,108		396,988		2.00% (9)	January 2029
2.75%, $600,000 aggregate principal	590,392		590,123		2.75% (10)	April 2031
2.90%, $400,000 aggregate principal	394,951		394,848		2.90% (11)	December 2033
Unsecured note payable	556		597		0% (12)	May 2026
Total debt, net	$	2,123,012	$	2,231,794

(1)The carrying values of our debt other than the Revolving Credit Facility reflect net deferred financing costs of $5.1 million as of March 31, 2023 and $5.4 million as of December 31, 2022.

(2)The weighted average interest rate on our fixed rate mortgage debt was 4.10% as of March 31, 2023.

(3)The weighted average interest rate on our variable rate secured debt as of March 31, 2023 was 6.20%, or 2.45% including the effect of interest rate swaps that hedge the risk of interest rate changes on this debt.

(4)The weighted average interest rate on the Revolving Credit Facility was 5.84% as of March 31, 2023.

(5)The facility matures in October 2026, with the ability for us to extend such maturity by two six-month periods at our option, provided that there is no default under the facility and we pay an extension fee of 0.0625% of the total availability under the facility for each extension period.

(6)The interest rate on this loan was 6.07% as of March 31, 2023.

(7)This facility matures in January 2026, with the ability for us to extend such maturity by two 12-month periods at our option, provided that there is no default under the facility and we pay an extension fee of 0.125% of the outstanding loan balance for each extension period.

(8)The carrying value of these notes reflects an unamortized discount totaling $2.6 million as of March 31, 2023 and $2.8 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.48%.

(9)The carrying value of these notes reflects an unamortized discount totaling $2.1 million as of March 31, 2023 and December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.09%.

(10)The carrying value of these notes reflects an unamortized discount totaling $8.3 million as of March 31, 2023 and $8.5 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 2.94%.

(11)The carrying value of these notes reflects an unamortized discount totaling $4.1 million as of March 31, 2023 and $4.2 million as of December 31, 2022. The effective interest rate under the notes, including amortization of the issuance costs, was 3.01%.

(12)This note carries an interest rate that, upon assumption, was below market rates and it therefore was recorded at its fair value based on applicable effective interest rates.  The carrying value of this note reflects an unamortized discount totaling $55,000 as of March 31, 2023 and $65,000 as of December 31, 2022.

Schedule of debt maturities

Our debt matures on the following schedule (in thousands):

Year Ending December 31,	March 31, 2023
2023 (1)	$	2,262
2024	29,983
2025	23,717
2026	689,300
2027	—
Thereafter	1,400,000
Total	$	2,145,262	(2)

(1)Represents the nine months ending December 31, 2023.

(2)Represents scheduled principal amortization and maturities only and therefore excludes net discounts and deferred financing costs of $22.3 million.

Schedule of the fair value of debt

The following table sets forth information pertaining to the fair value of our debt (in thousands): 

	March 31, 2023				December 31, 2022
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Fixed-rate debt
Unsecured Senior Notes	$	1,779,256	$	1,436,838	$	1,778,498	$	1,433,561
Other fixed-rate debt	68,510		64,120		85,030		80,330
Variable-rate debt	275,246		274,551		368,266		367,896
	$	2,123,012	$	1,775,509	$	2,231,794	$	1,881,787

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Interest Rate Derivatives (Tables)

3 Months Ended

Mar. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of key terms and fair values of interest rate swap derivatives

The following table sets forth the key terms and fair values of our interest rate swap derivatives (dollars in thousands):

							Fair Value at
Notional Amount			Fixed Rate	Floating Rate Index	Effective Date	Expiration Date	March 31, 2023		December 31, 2022
$	10,820	(1)	1.678%	SOFR + 0.10%	8/1/2019	8/1/2026	$	654	$	806
$	22,700	(2)	0.573%	SOFR + 0.10%	4/1/2020	3/26/2025	1,525		1,825
$	150,000		3.742%	One-Month SOFR	2/1/2023	2/2/2026	(262)		—
$	50,000		3.747%	One-Month SOFR	2/1/2023	2/2/2026	(93)		—
							$	1,824	$	2,631

(1)The notional amount of this instrument is scheduled to amortize to $10.0 million.

(2)The notional amount of this instrument is scheduled to amortize to $22.1 million.

Schedule of fair value and balance sheet classification of interest rate derivatives

The table below sets forth the fair value of our interest rate derivatives as well as their classification on our consolidated balance sheets (in thousands):

		Fair Value at
Derivatives	Balance Sheet Location	March 31, 2023		December 31, 2022
Interest rate swaps designated as cash flow hedges	Prepaid expenses and other assets, net	$	2,179	$	2,631
Interest rate swaps designated as cash flow hedges	Other liabilities	$	(355)	$	—

Schedule of effect of interest rate derivatives on consolidated statements of operations and comprehensive income

The table below presents the effect of our interest rate derivatives on our consolidated statements of operations and comprehensive income (in thousands):

	Amount of (Loss) Income Recognized in AOCI on Derivatives				Amount of Income (Loss) Reclassified from AOCI into Interest Expense on Statement of Operations
Derivatives in Hedging Relationships	For the Three Months Ended March 31,				For the Three Months Ended March 31,
	2023		2022		2023		2022
Interest rate derivatives	$	(215)	$	2,537	$	591	$	(1,003)

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Redeemable Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2023

Noncontrolling Interest [Abstract]

Schedule of activity for redeemable noncontrolling interest

The table below sets forth the activity for these redeemable noncontrolling interests (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	26,293	$	26,898
Distributions to noncontrolling interests	(763)		(606)
Net income attributable to noncontrolling interests	699		567
Adjustments for changes in fair value of interests	(781)		(39)
Ending balance	$	25,448	$	26,820

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Information by Business Segment (Tables)

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Schedule of segment financial information for real estate operations

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

	Defense/IT Locations
	Fort Meade/BW Corridor		NoVA Defense/IT		Lackland Air Force Base		Navy Support		Redstone Arsenal		Data Center Shells		Total Defense/IT Locations		Regional Office		Wholesale Data Center		Other		Total
Three Months Ended March 31, 2023
Revenues from real estate operations	$	69,777	$	19,829	$	15,605	$	7,925	$	13,414	$	6,692	$	133,242	$	16,054	$	—	$	2,385	$	151,681
Property operating expenses	(24,520)		(7,572)		(7,945)		(3,543)		(4,636)		(594)		(48,810)		(8,851)		—		(1,759)		(59,420)
UJV NOI allocable to COPT	—		—		—		—		—		1,642		1,642		—		—		—		1,642
NOI from real estate operations	$	45,257	$	12,257	$	7,660	$	4,382	$	8,778	$	7,740	$	86,074	$	7,203	$	—	$	626	$	93,903
Additions to long-lived assets	$	12,135	$	2,398	$	62	$	759	$	6,594	$	—	$	21,948	$	3,278	$	—	$	11	$	25,237
Transfers from non-operating properties	$	5,781	$	238	$	28	$	2,650	$	14,392	$	3,311	$	26,400	$	13	$	—	$	—	$	26,413
Segment assets at March 31, 2023	$	1,390,273	$	486,649	$	193,160	$	169,235	$	472,237	$	324,422	$	3,035,976	$	545,817	$	—	$	3,321	$	3,585,114
Three Months Ended March 31, 2022
Revenues from real estate operations	$	67,214	$	18,576	$	14,713	$	8,169	$	9,195	$	7,505	$	125,372	$	15,082	$	1,980	$	1,826	$	144,260
Property operating expenses	(25,784)		(6,869)		(7,072)		(3,471)		(3,735)		(1,010)		(47,941)		(7,930)		(1,025)		(1,256)		(58,152)
UJV NOI allocable to COPT	—		—		—		—		—		1,080		1,080		—		—		—		1,080
NOI from real estate operations	$	41,430	$	11,707	$	7,641	$	4,698	$	5,460	$	7,575	$	78,511	$	7,152	$	955	$	570	$	87,188
Additions to long-lived assets	$	11,785	$	2,189	$	—	$	740	$	235	$	—	$	14,949	$	4,333	$	(51)	$	1	$	19,232
Transfers from non-operating properties	$	5,369	$	319	$	418	$	6,376	$	76	$	81,203	$	93,761	$	271	$	—	$	—	$	94,032
Segment assets at March 31, 2022	$	1,334,119	$	488,479	$	197,406	$	175,176	$	297,974	$	430,447	$	2,923,601	$	536,909	$	—	$	3,901	$	3,464,411

Schedule of reconciliation of segment revenues to total revenues

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

	For the Three Months Ended March 31,
	2023		2022
Segment revenues from real estate operations	$	151,681	$	144,260
Construction contract and other service revenues	15,820		53,200
Less: Revenues from discontinued operations	—		(1,980)
Total revenues	$	167,501	$	195,480

Schedule of reconciliation of segment property operating expenses to property operating expenses

The following table reconciles our segment property operating expenses to property operating expenses as reported on our consolidated statements of operations (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Segment property operating expenses	$	59,420	$	58,152
Less: Property operating expenses from discontinued operations	—		(971)
Total property operating expenses	$	59,420	$	57,181

Reconciliation of UJV NOI allocable to COPT to equity in income of unconsolidated entities

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

	For the Three Months Ended March 31,
	2023		2022
UJV NOI allocable to COPT	$	1,642	$	1,080
Less: Income from UJV allocable to COPT attributable to depreciation and amortization expense and interest expense	(1,704)		(758)
Add: Equity in (loss) income of unconsolidated non-real estate entities	(2)		566
Equity in (loss) income of unconsolidated entities	$	(64)	$	888

Schedule of computation of net operating income from service operations

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

	For the Three Months Ended March 31,
	2023		2022
Construction contract and other service revenues	$	15,820	$	53,200
Construction contract and other service expenses	(15,201)		(51,650)
NOI from service operations	$	619	$	1,550

Schedule of reconciliation of net operating income from real estate operations and service operations to income from continuing operations

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

	For the Three Months Ended March 31,
	2023		2022
NOI from real estate operations	$	93,903	$	87,188
NOI from service operations	619		1,550
Depreciation and other amortization associated with real estate operations	(36,995)		(34,264)
General, administrative and leasing expenses	(9,995)		(8,544)
Business development expenses and land carry costs	(495)		(783)
Interest expense	(16,442)		(14,424)
Interest and other income	2,323		1,893
Credit loss (expense) recoveries	(67)		316
Gain on sales of real estate	49,378		15
Loss on early extinguishment of debt	—		(342)
Equity in (loss) income of unconsolidated entities	(64)		888
UJV NOI allocable to COPT included in equity in (loss) income of unconsolidated entities	(1,642)		(1,080)
Income tax expense	(125)		(153)
Revenues from real estate operations from discontinued operations	—		(1,980)
Property operating expenses from discontinued operations	—		971
Income from continuing operations	$	80,398	$	31,251

Schedule of reconciliation of segment assets to total assets

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

	March 31, 2023		March 31, 2022
Segment assets	$	3,585,114	$	3,464,411
Operating properties lease liabilities included in segment assets	35,327		29,729
Non-operating property assets	345,518		419,346
Other assets	212,033		218,540
Total consolidated assets	$	4,177,992	$	4,132,026

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Construction Contract and Other Service Revenues (Tables)

3 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

The table below reports construction contract and other service revenues by compensation arrangement (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract revenue:
Guaranteed maximum price	$	6,743	$	47,923
Firm fixed price	5,879		3,444
Cost-plus fee	2,709		1,306
Other	489		527
	$	15,820	$	53,200

The table below reports construction contract and other service revenues by service type (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Construction contract revenue:
Construction	$	14,725	$	52,569
Design	606		104
Other	489		527
	$	15,820	$	53,200

Contract with customer, contract asset, contract liability and receivable

The beginning and ending balances of accounts receivable related to our construction contracts were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	7,618	$	7,193
Ending balance	$	6,786	$	4,165

The beginning and ending balances of our contract assets were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	22,331	$	22,384
Ending balance	$	20,619	$	29,389

Changes in contract liabilities were as follows (in thousands):

	For the Three Months Ended March 31,
	2023		2022
Beginning balance	$	2,867	$	2,499
Ending balance	$	3,399	$	2,534
Portion of beginning balance recognized in revenue during period	$	77	$	26

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Credit Losses on Financial Assets and Other Instruments (Tables)

3 Months Ended

Mar. 31, 2023

Credit Loss [Abstract]

Credit losses, financial assets and other instruments, allowance for credit loss

The table below sets forth the activity for our allowance for credit losses for the three months ended March 31, 2023 and 2022 (in thousands):

	Investing Receivables		Tenant Notes Receivable (1)		Other Assets (2)		Total
December 31, 2022	$	2,794	$	778	$	268	$	3,840
Credit loss expense (recoveries)	143		(19)		(57)		67
Write-offs	—		(33)		—		(33)
March 31, 2023	$	2,937	$	726	$	211	$	3,874
December 31, 2021	$	1,599	$	1,057	$	913	$	3,569
Credit loss expense (recoveries)	77		(34)		(359)		(316)
March 31, 2022	$	1,676	$	1,023	$	554	$	3,253

(1)Included in the line entitled “accounts receivable, net” on our consolidated balance sheets.

(2)The balance as of March 31, 2023 was included in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet. The balance as of December 31, 2022 included $52,000 in the line entitled “accounts receivable, net” and $216,000 in the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheet.

Financing receivable credit quality indicator

The following table presents the amortized cost basis of our investing receivables, tenant notes receivable and sales-type lease receivables by credit risk classification, by origination year as of March 31, 2023 (in thousands):

	Origination Year
	2018 and Earlier		2019		2020		2021		2022		2023		Total
Investing receivables:
Credit risk classification:
Investment grade	$	61,092	$	—	$	1,931	$	7,569	$	—	$	—	$	70,592
Non-investment grade	—		—		—		—		17,844		—		17,844
Total	$	61,092	$	—	$	1,931	$	7,569	$	17,844	$	—	$	88,436
Tenant notes receivable:
Credit risk classification:
Investment grade	$	772	$	34	$	176	$	—	$	—	$	—	$	982
Non-investment grade	193		78		1,532		—		—		—		1,803
Total	$	965	$	112	$	1,708	$	—	$	—	$	—	$	2,785
Gross write-offs during the three months ended March 31, 2023	$	33	$	—	$	—	$	—	$	—	$	—	$	33
Sales-type lease receivables:
Credit risk classification:
Investment grade	$	—	$	—	$	5,528	$	—	$	—	$	—	$	5,528

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Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of restricted share and TB-PIU transactions under the entity's share-based compensation plans

The following table summarizes restricted share activity under our share-based compensation plans for the three months ended March 31, 2023:

	Number of Shares	Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022	325,083	$	26.27
Granted	158,242	$	25.72
Forfeited	(24,510)	$	25.89
Vested	(124,838)	$	26.02
Unvested as of March 31, 2023	333,977	$	26.13

The following table summarizes TB-PIUs activity under our share-based compensation plans for the three months ended March 31, 2023:

	Number of TB-PIUs	Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022	187,330	$	26.19
Granted	82,334	$	25.72
Forfeited	(27,182)	$	26.46
Vested	(73,869)	$	26.07
Unvested as of March 31, 2023	168,613	$	25.97

Schedule of payouts for defined performance under PB-PIUs

The number of earned awards at the end of the performance period will be determined based on the percentile rank of COPT’s total shareholder return (“TSR”) relative to a peer group of companies, as set forth in the following schedule:

Percentile Rank	Earned PB-PIUs Payout %
75th or greater	100% of PB-PIUs granted
50th (target)	50% of PB-PIUs granted
25th	25% of PB-PIUs granted
Below 25th	0% of PB-PIUs granted

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Earnings Per Share ("EPS") (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Summary of calculation of numerator and denominator in basic and diluted earnings per share

Summaries of the numerator and denominator for purposes of basic and diluted EPS calculations are set forth below (in thousands, except per share data):

	For the Three Months Ended March 31,
	2023		2022
Numerator:
Income from continuing operations	$	80,398	$	31,251
Income from continuing operations attributable to noncontrolling interests	(1,619)		(1,084)
Income from continuing operations attributable to share-based compensation awards for basic EPS	(297)		(116)
Numerator for basic EPS from continuing operations attributable to common shareholders	78,482		30,051
Redeemable noncontrolling interests	(64)		(39)
Adjustment to income from continuing operations attributable to share-based compensation awards for diluted EPS	49		18
Numerator for diluted EPS from continuing operations attributable to common shareholders	78,467		30,030
Discontinued operations	—		29,573
Discontinued operations attributable to noncontrolling interests	—		(421)
Income from discontinued operations attributable to share-based compensation awards for diluted EPS	—		(83)
Numerator for diluted EPS on net income attributable to common shareholders	$	78,467	$	59,099
Denominator (all weighted averages):
Denominator for basic EPS (common shares)	112,127		112,020
Dilutive effect of redeemable noncontrolling interests	91		132
Dilutive effect of share-based compensation awards	410		426
Denominator for diluted EPS (common shares)	112,628		112,578
Basic EPS attributable to common shareholders:
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.26
Net income	$	0.70	$	0.53
Diluted EPS attributable to common shareholders:
Income from continuing operations	$	0.70	$	0.27
Discontinued operations	—		0.25
Net income	$	0.70	$	0.52

Schedule of securities excluded from computation of diluted earnings per share

Our diluted EPS computations do not include the effects of the following securities since the conversions of such securities would increase diluted EPS for the respective periods (in thousands):

	Weighted Average Shares Excluded from Denominator
	For the Three Months Ended March 31,
	2023	2022
Conversion of common units	1,489	1,384
Conversion of redeemable noncontrolling interests	972	806

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Organization - Narrative (Details) - 3 months ended Mar. 31, 2023 ft² in Millions	property	ft²	a	shares
Corporate Office Properties, L.P. | Preferred Units
Investments in real estate
Limited partners' capital account, units outstanding (in units) | shares				0
COPT | Corporate Office Properties, L.P. | Common Units
Investments in real estate
Percentage ownership in operating partnership	97.90%
Unconsolidated Real Estate Joint Ventures
Investments in real estate
Number of real estate properties	24
Operating Properties
Investments in real estate
Number of real estate properties	194
Area of real estate property (in sqft or acres) | ft²		23.0
Operating Properties | Office Properties
Investments in real estate
Number of real estate properties	166
Area of real estate property (in sqft or acres) | ft²		17.7
Operating Properties | Single-tenant data centers
Investments in real estate
Number of real estate properties	28
Area of real estate property (in sqft or acres) | ft²		5.3
Operating Properties | Single-tenant data centers | Unconsolidated Real Estate Joint Ventures
Investments in real estate
Number of real estate properties	24
Properties under development
Investments in real estate
Number of real estate properties	9
Area of real estate property (in sqft or acres) | ft²		1.5
Properties under development | Office Properties
Investments in real estate
Number of real estate properties	5
Properties under development | Single-tenant data centers
Investments in real estate
Number of real estate properties	4
Properties under development, partially-operational
Investments in real estate
Number of real estate properties	1
Land controlled for future development
Investments in real estate
Area of real estate property (in sqft or acres)		9.0	680
Other Land
Investments in real estate
Area of real estate property (in sqft or acres) | a			40

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Fair Value Measurements - Narrative (Details) - Fair value measurement on a recurring basis - Deferred compensation plan - Trustees and Management - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Mar. 31, 2023
Assets and liabilities measured at fair value on a recurring basis
Maximum percentage of participants' compensation which is deferrable (as a percent)	100.00%
Marketable securities in deferred compensation plan		$ 1.9

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Fair Value Measurements - Assets and Liabilities, Measured on Recurring Basis (Details) - Fair value measurement on a recurring basis $ in Thousands	Mar. 31, 2023 USD ($)
Assets:
Interest rate derivatives	$ 2,179
Total assets	4,054
Liabilities:
Deferred compensation plan liability	1,875
Interest rate derivatives	355
Total liabilities	2,230
Mutual funds
Assets:
Marketable securities in deferred compensation plan	1,831
Other
Assets:
Marketable securities in deferred compensation plan	44
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Interest rate derivatives	0
Total assets	1,875
Liabilities:
Deferred compensation plan liability	0
Interest rate derivatives	0
Total liabilities	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual funds
Assets:
Marketable securities in deferred compensation plan	1,831
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other
Assets:
Marketable securities in deferred compensation plan	44
Significant Other Observable Inputs (Level 2)
Assets:
Interest rate derivatives	2,179
Total assets	2,179
Liabilities:
Deferred compensation plan liability	1,875
Interest rate derivatives	355
Total liabilities	2,230
Significant Other Observable Inputs (Level 2) | Mutual funds
Assets:
Marketable securities in deferred compensation plan	0
Significant Other Observable Inputs (Level 2) | Other
Assets:
Marketable securities in deferred compensation plan	0
Significant Unobservable  Inputs (Level 3)
Assets:
Interest rate derivatives	0
Total assets	0
Liabilities:
Deferred compensation plan liability	0
Interest rate derivatives	0
Total liabilities	0
Significant Unobservable  Inputs (Level 3) | Mutual funds
Assets:
Marketable securities in deferred compensation plan	0
Significant Unobservable  Inputs (Level 3) | Other
Assets:
Marketable securities in deferred compensation plan	$ 0

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Properties, Net - Operating Properties, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Operating Properties, Net
Operating properties, net	$ 3,272,873	$ 3,258,899
Operating Properties
Operating Properties, Net
Less: Accumulated depreciation	(1,300,430)	(1,267,434)
Operating properties, net	3,272,873	3,258,899
Operating Properties | Land
Operating Properties, Net
Gross	540,037	539,809
Operating Properties | Buildings and improvements
Operating Properties, Net
Gross	$ 4,033,266	$ 3,986,524

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Properties, Net - Narrative (Details) $ in Millions		3 Months Ended
	Jan. 10, 2023 USD ($) property	Mar. 31, 2023 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal		Gain on sales of real estate
Redshift JV LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Nominal Ownership %	10.00%	10.00%
Data Center Shells in Northern Virginia | Disposed of by sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage sold	90.00%
Number of properties sold | property	3
Transaction value	$ 211.3
Proceeds from sale	$ 190.2
Gain on sale of ownership interest		$ 49.4

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Properties, Net - Schedule of Assets Held for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net	$ 0	$ 161,286
Disposed of by sale | Data Center Shells
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Properties, net		156,691
Deferred rent receivable		4,595
Assets held for sale, net		$ 161,286

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Leases - Lease Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Lessor, Lease, Description [Line Items]
Lease revenue	$ 150,560	$ 141,389
Continuing Operations
Lessor, Lease, Description [Line Items]
Fixed	116,039	111,167
Variable	34,521	30,222
Lease revenue	$ 150,560	141,389
Discontinued Operations
Lessor, Lease, Description [Line Items]
Fixed		1,500
Variable		$ 527

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Leases - Payments to be Received (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Operating leases
2023	$ 329,700
2024	415,499
2025	332,260
2026	263,741
2027	228,712
Thereafter	1,023,570
Total contractual payments	2,593,482
Sales-type leases
2023	720
2024	960
2025	960
2026	960
2027	960
Thereafter	2,596
Total contractual payments	7,156
Less: Amount representing interest	(1,628)
Net investment in sales-type leases	$ 5,528

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Leases - Lessee Arrangements (Details) $ in Millions	Mar. 31, 2023 USD ($)
Leases [Abstract]
Carrying value of lessee right-of-use asset	$ 45.4

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Leases - Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating leases - Property	$ 42,808	$ 37,020
Finance leases - Property	2,621	2,207
Total right-of-use assets	45,429	39,227
Operating leases - Property	34,896	28,759
Finance leases - Property	431	0
Total lease liabilities	$ 35,327	$ 28,759
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid expenses and other assets, net	Prepaid expenses and other assets, net
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities

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Leases - Narrative (Details)	Mar. 31, 2023
Leases [Abstract]
Operating leases, weighted average remaining lease term	45 years
Operating lease, weighted average discount rate	7.34%
Finance leases, weighted average remaining lease term	10 years
Finance leases, weighted average discount rate	9.14%

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Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Lessee, Lease, Description [Line Items]
Lease costs	$ 1,585	$ 1,043
Property Operating Expense
Lessee, Lease, Description [Line Items]
Property leases - fixed	1,535	1,019
Property leases - variable	17	16
Amortization of property right-of-use assets	20	8
Interest expense
Lessee, Lease, Description [Line Items]
Interest on lease liabilities	$ 13	$ 0

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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Leases [Abstract]
Operating cash flows for operating leases	$ 1,185	$ 837
Operating cash flows for financing leases	13	0
Financing cash flows for financing leases	$ 4	$ 0

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Leases - Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Operating Leases
2023	$ 4,863
2024	6,623
2025	2,249
2026	1,662
2027	1,677
Thereafter	130,495
Total lease payments	147,569
Less: Amount representing interest	(112,673)
Lease liability	34,896	$ 28,759
Finance Leases
2023	45
2024	61
2025	63
2026	65
2027	67
Thereafter	365
Total lease payments	666
Less: Amount representing interest	(235)
Lease liability	$ 431	$ 0

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Real Estate Joint Ventures - Investments in Consolidated Real Estate Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Investments in consolidated real estate joint ventures
Total Assets	$ 4,177,992	$ 4,257,275	$ 4,132,026
Total Liabilities	2,383,730	$ 2,509,527
LW Redstone Company LLC
Investments in consolidated real estate joint ventures
Preferred distributions of annual operating cash flows to partner	1,200
Variable Interest Entity, Primary Beneficiary
Investments in consolidated real estate joint ventures
Total Assets	903,024
Total Liabilities	168,619
Variable Interest Entity, Primary Beneficiary | Asset Pledged as Collateral
Investments in consolidated real estate joint ventures
Total Assets	153,144
Variable Interest Entity, Primary Beneficiary | Mortgage and other secured debt
Investments in consolidated real estate joint ventures
Total Liabilities	$ 101,166
Variable Interest Entity, Primary Beneficiary | LW Redstone Company LLC
Investments in consolidated real estate joint ventures
Nominal Ownership %	85.00%
Total Assets	$ 633,045
Total Liabilities	114,695
Variable Interest Entity, Primary Beneficiary | LW Redstone Company LLC | Asset Pledged as Collateral
Investments in consolidated real estate joint ventures
Total Assets	94,288
Variable Interest Entity, Primary Beneficiary | LW Redstone Company LLC | Mortgage and other secured debt
Investments in consolidated real estate joint ventures
Total Liabilities	$ 51,659
Variable Interest Entity, Primary Beneficiary | Stevens Investors, LLC
Investments in consolidated real estate joint ventures
Nominal Ownership %	95.00%
Total Assets	$ 168,445
Total Liabilities	2,379
Variable Interest Entity, Primary Beneficiary | Stevens Investors, LLC | Asset Pledged as Collateral
Investments in consolidated real estate joint ventures
Total Assets	0
Variable Interest Entity, Primary Beneficiary | Stevens Investors, LLC | Mortgage and other secured debt
Investments in consolidated real estate joint ventures
Total Liabilities	$ 0
Variable Interest Entity, Primary Beneficiary | M Square Associates, LLC
Investments in consolidated real estate joint ventures
Nominal Ownership %	50.00%
Total Assets	$ 101,534
Total Liabilities	51,545
Variable Interest Entity, Primary Beneficiary | M Square Associates, LLC | Asset Pledged as Collateral
Investments in consolidated real estate joint ventures
Total Assets	58,856
Variable Interest Entity, Primary Beneficiary | M Square Associates, LLC | Mortgage and other secured debt
Investments in consolidated real estate joint ventures
Total Liabilities	$ 49,507

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Real Estate Joint Ventures - Investments in Unconsolidated Real Estate Joint Ventures (Details) $ in Thousands	Mar. 31, 2023 USD ($) property	Jan. 10, 2023	Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated real estate joint ventures	$ 42,279		$ 21,460
Other liabilities	$ 21,008		18,556
Unconsolidated Real Estate Joint Ventures
Schedule of Equity Method Investments [Line Items]
Number of Properties | property	24
Carrying value of Investments	$ 40,476		20,001
Other liabilities	$ (1,800)		(1,500)
Redshift JV LLC
Schedule of Equity Method Investments [Line Items]
Nominal Ownership %	10.00%	10.00%
Number of Properties | property	3
Carrying value of Investments	$ 21,181		0
BREIT COPT DC JV LLC
Schedule of Equity Method Investments [Line Items]
Nominal Ownership %	10.00%
Number of Properties | property	9
Carrying value of Investments	$ 11,331		11,568
Quark JV LLC
Schedule of Equity Method Investments [Line Items]
Nominal Ownership %	10.00%
Number of Properties | property	2
Carrying value of Investments	$ 6,761		6,758
B RE COPT DC JV III LLC
Schedule of Equity Method Investments [Line Items]
Nominal Ownership %	10.00%
Number of Properties | property	2
Carrying value of Investments	$ 3,006		3,134
B RE COPT DC JV II LLC
Schedule of Equity Method Investments [Line Items]
Nominal Ownership %	10.00%
Number of Properties | property	8
Carrying value of Investments	$ (1,803)		(1,459)
Difference between the joint venture's cost basis and the entity's share of underlying equity in the net assets	$ 7,000		$ 7,000

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Real Estate Joint Ventures - Narrative (Details) - property	Mar. 31, 2023	Jan. 10, 2023
Redshift JV LLC
Real Estate [Line Items]
Nominal ownership %	10.00%	10.00%
Disposed of by sale | Data Center Shells in Northern Virginia
Real Estate [Line Items]
Ownership percentage sold		90.00%
Number of properties sold		3

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Investing Receivables - Investing Receivables (Details) - Investing Receivables - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis	$ 88,436	$ 87,415
Allowance for credit losses	(2,937)	(2,794)	$ (1,676)	$ (1,599)
Investing receivables, net	85,499	84,621
Notes receivable from the City of Huntsville
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis	70,592	69,703
Other investing loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis	$ 17,844	$ 17,712

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Investing Receivables - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Investing Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, fair value disclosure	$ 89,000	$ 87,000
Investing Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable, net of allowance for credit losses	$ 750	$ 2,900
Investing Receivables | Other investing loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other investing loans receivable, remaining term	1 year
Investing Receivables | Other investing loans receivable | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate	12.00%
Investing Receivables | Other investing loans receivable | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate	14.00%
Investing Receivables | LW Redstone Company LLC | Notes receivable from the City of Huntsville
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate	9.95%

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Debt, Net - Schedule of Debt (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) extension	Dec. 31, 2022 USD ($)
Debt
Carrying Value	$ 2,123,012,000	$ 2,231,794,000
Mortgage and other secured debt
Debt
Carrying Value	101,166,000	117,751,000
Loans payable
Debt
Net deferred financing costs	$ 5,100,000	5,400,000
Line of Credit | Revolving Credit Facility
Debt
Number of extensions | extension	2
Extension option period (in years)	6 months
Line of credit facility, extension fee percentage	0.0625%
Fixed rate mortgage debt | Mortgage and other secured debt
Debt
Carrying Value	$ 67,954,000	84,433,000
Weighted average interest rate (as a percent)	4.10%
Fixed rate mortgage debt | Mortgage and other secured debt | Minimum
Debt
Interest rate	3.82%
Fixed rate mortgage debt | Mortgage and other secured debt | Maximum
Debt
Interest rate	4.62%
Variable rate secured debt | Mortgage and other secured debt
Debt
Carrying Value	$ 33,212,000	33,318,000
Variable rate secured debt | Mortgage and other secured debt | Secured Overnight Financing Rate
Debt
Variable rate, additional spread	0.10%
Weighted average interest rate (as a percent)	6.20%
Variable rate secured debt | Mortgage and other secured debt | Secured Overnight Financing Rate | Interest rate swaps
Debt
Weighted average interest rate (as a percent)	2.45%
Variable rate secured debt | Mortgage and other secured debt | Minimum | Secured Overnight Financing Rate
Debt
Variable rate, spread	1.45%
Variable rate secured debt | Mortgage and other secured debt | Maximum | Secured Overnight Financing Rate
Debt
Variable rate, spread	1.55%
Revolving Credit Facility
Debt
Carrying Value	$ 118,000,000	211,000,000
Revolving Credit Facility | Secured Overnight Financing Rate
Debt
Variable rate, additional spread	0.10%
Weighted average interest rate (as a percent)	5.84%
Revolving Credit Facility | Minimum | Secured Overnight Financing Rate
Debt
Variable rate, spread	0.725%
Revolving Credit Facility | Maximum | Secured Overnight Financing Rate
Debt
Variable rate, spread	1.40%
Term Loan Facility
Debt
Carrying Value	$ 124,034,000	123,948,000
Number of extensions | extension	2
Extension option period (in years)	12 months
Line of credit facility, extension fee percentage	0.125%
Term Loan Facility | Secured Overnight Financing Rate
Debt
Interest rate	6.07%
Variable rate, additional spread	0.10%
Term Loan Facility | Minimum | Secured Overnight Financing Rate
Debt
Variable rate, spread	0.85%
Term Loan Facility | Maximum | Secured Overnight Financing Rate
Debt
Variable rate, spread	1.70%
2.25%, $400,000 aggregate principal | Unsecured Senior Notes
Debt
Interest rate	2.25%
Debt instrument, face amount	$ 400,000,000
Carrying Value	396,805,000	396,539,000
Unamortized discount included in carrying value	$ 2,600,000	2,800,000
Effective interest rate on debt	2.48%
2.00%, $400,000 aggregate principal | Unsecured Senior Notes
Debt
Interest rate	2.00%
Debt instrument, face amount	$ 400,000,000
Carrying Value	397,108,000	396,988,000
Unamortized discount included in carrying value	$ 2,100,000	2,100,000
Effective interest rate on debt	2.09%
2.75%, $600,000 aggregate principal | Unsecured Senior Notes
Debt
Interest rate	2.75%
Debt instrument, face amount	$ 600,000,000
Carrying Value	590,392,000	590,123,000
Unamortized discount included in carrying value	$ 8,300,000	8,500,000
Effective interest rate on debt	2.94%
2.90%, $400,000 aggregate principal | Unsecured Senior Notes
Debt
Interest rate	2.90%
Debt instrument, face amount	$ 400,000,000
Carrying Value	394,951,000	394,848,000
Unamortized discount included in carrying value	$ 4,100,000	4,200,000
Effective interest rate on debt	3.01%
Unsecured note payable
Debt
Interest rate	0.00%
Carrying Value	$ 556,000	597,000
Unamortized discount included in carrying value	$ 55,000	$ 65,000

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Debt, Net - Debt Maturities (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Schedule on basis of which debt matures
2023	$ 2,262
2024	29,983
2025	23,717
2026	689,300
2027	0
Thereafter	1,400,000
Total	2,145,262
Net discounts and deferred financing costs	$ 22,300

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Debt, Net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Disclosure [Abstract]
Interest costs capitalized	$ 770	$ 1,500

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Debt, Net - Fair Value of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Carrying Amount
Carrying amount and estimated fair value of debt
Long-term debt	$ 2,123,012	$ 2,231,794
Carrying Amount | Unsecured Senior Notes
Carrying amount and estimated fair value of debt
Long-term debt	1,779,256	1,778,498
Carrying Amount | Other fixed-rate debt
Carrying amount and estimated fair value of debt
Long-term debt	68,510	85,030
Carrying Amount | Variable rate debt
Carrying amount and estimated fair value of debt
Long-term debt	275,246	368,266
Estimated Fair Value
Carrying amount and estimated fair value of debt
Long-term debt	1,775,509	1,881,787
Estimated Fair Value | Unsecured Senior Notes
Carrying amount and estimated fair value of debt
Long-term debt	1,436,838	1,433,561
Estimated Fair Value | Other fixed-rate debt
Carrying amount and estimated fair value of debt
Long-term debt	64,120	80,330
Estimated Fair Value | Variable rate debt
Carrying amount and estimated fair value of debt
Long-term debt	$ 274,551	$ 367,896

XML

Interest Rate Derivatives - Key Terms and Fair Value of Interest Rate Derivative (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair values of interest rate swap derivatives
Fair value of interest rate swaps	$ 1,824	$ 2,631
Designated | Interest rate swap, effective August 1, 2019
Fair values of interest rate swap derivatives
Notional Amount	$ 10,820
Fixed Rate	1.678%
Fair value of interest rate swaps	$ 654	806
Notional amount of interest rate derivatives after scheduled amortization	$ 10,000
Designated | Interest rate swap, effective August 1, 2019 | Secured Overnight Financing Rate
Fair values of interest rate swap derivatives
Floating Rate Index	0.10%
Designated | Interest rate swap, effective April 1, 2020
Fair values of interest rate swap derivatives
Notional Amount	$ 22,700
Fixed Rate	0.573%
Fair value of interest rate swaps	$ 1,525	1,825
Notional amount of interest rate derivatives after scheduled amortization	$ 22,100
Designated | Interest rate swap, effective April 1, 2020 | Secured Overnight Financing Rate
Fair values of interest rate swap derivatives
Floating Rate Index	0.10%
Designated | Interest Rate Swap, Effective February 1, 2023 3.742%
Fair values of interest rate swap derivatives
Notional Amount	$ 150,000
Fixed Rate	3.742%
Fair value of interest rate swaps	$ (262)	0
Designated | Interest Rate Swap, Effective February 1, 2023 3.747%
Fair values of interest rate swap derivatives
Notional Amount	$ 50,000
Fixed Rate	3.747%
Fair value of interest rate swaps	$ (93)	$ 0

XML

Interest Rate Derivatives - Fair Value and Classification of Interest Rate Derivatives (Details) - Interest rate swaps - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Prepaid expenses and other assets, net
Fair value of interest rate derivatives and balance sheet classification
Interest rate swaps designated as cash flow hedges	$ 2,179	$ 2,631
Other liabilities
Fair value of interest rate derivatives and balance sheet classification
Interest rate swaps designated as cash flow hedges	$ (355)	$ 0

XML

Interest Rate Derivatives - Effect of Interest Rate Derivatives on Statement of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income
Amount of (Loss) Income Recognized in AOCI on Derivatives	$ (215)	$ 2,537
Amount of Income (Loss) Reclassified from AOCI into Interest Expense on Statement of Operations	591	(1,003)
Interest rate swaps
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income
Amount of (Loss) Income Recognized in AOCI on Derivatives	(215)	2,537
Interest rate swaps | Interest expense
Effect of interest rate derivatives on consolidated statements of operations and comprehensive income
Amount of Income (Loss) Reclassified from AOCI into Interest Expense on Statement of Operations	$ 591	$ (1,003)

XML

Interest Rate Derivatives - Narrative (Details) - Interest rate swaps - Designated $ in Thousands	Mar. 31, 2023 USD ($)
Fair values of interest rate swap derivatives
Approximate amount to be reclassified from AOCL to interest expense over the next 12 months	$ 2,900
Fair value of derivative liability	$ 219

XML

Redeemable Noncontrolling Interests (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) joint_venture	Mar. 31, 2022 USD ($)
Noncontrolling Interest [Abstract]
Number of joint ventures with redeemable noncontrolling interests | joint_venture	2
Redeemable Noncontrolling Interest [Roll Forward]
Beginning balance	$ 26,293	$ 26,898
Distributions to noncontrolling interests	(763)	(606)
Net income attributable to noncontrolling interests	699	567
Adjustments for changes in fair value of interests	(781)	(39)
Ending balance	$ 25,448	$ 26,820

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Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Equity [Abstract]
At the market, offering program established, aggregate value	$ 300
Dividends declared per share (in dollars per share)	$ 0.285	$ 0.275

XML

Information by Business Segment - Segment Financial Information for Our Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment financial information for real estate operations
Revenues from real estate operations	$ 167,501	$ 195,480
UJV NOI allocable to COPT	1,642	1,080
Segment assets	4,177,992	4,132,026	$ 4,257,275
Segment assets
Segment financial information for real estate operations
Segment assets	3,585,114	3,464,411
Real estate operations
Segment financial information for real estate operations
Revenues from real estate operations	151,681	144,260
Property operating expenses	(59,420)	(58,152)
UJV NOI allocable to COPT	1,642	1,080
NOI from real estate operations	93,903	87,188
Additions to long-lived assets	25,237	19,232
Transfers from non-operating properties	26,413	94,032
Real estate operations | Defense/IT Locations
Segment financial information for real estate operations
Revenues from real estate operations	133,242	125,372
Property operating expenses	(48,810)	(47,941)
UJV NOI allocable to COPT	1,642	1,080
NOI from real estate operations	86,074	78,511
Additions to long-lived assets	21,948	14,949
Transfers from non-operating properties	26,400	93,761
Real estate operations | Defense/IT Locations | Fort Meade/BW Corridor
Segment financial information for real estate operations
Revenues from real estate operations	69,777	67,214
Property operating expenses	(24,520)	(25,784)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	45,257	41,430
Additions to long-lived assets	12,135	11,785
Transfers from non-operating properties	5,781	5,369
Real estate operations | Defense/IT Locations | NoVA Defense/IT
Segment financial information for real estate operations
Revenues from real estate operations	19,829	18,576
Property operating expenses	(7,572)	(6,869)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	12,257	11,707
Additions to long-lived assets	2,398	2,189
Transfers from non-operating properties	238	319
Real estate operations | Defense/IT Locations | Lackland Air Force Base
Segment financial information for real estate operations
Revenues from real estate operations	15,605	14,713
Property operating expenses	(7,945)	(7,072)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	7,660	7,641
Additions to long-lived assets	62	0
Transfers from non-operating properties	28	418
Real estate operations | Defense/IT Locations | Navy Support
Segment financial information for real estate operations
Revenues from real estate operations	7,925	8,169
Property operating expenses	(3,543)	(3,471)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	4,382	4,698
Additions to long-lived assets	759	740
Transfers from non-operating properties	2,650	6,376
Real estate operations | Defense/IT Locations | Redstone Arsenal
Segment financial information for real estate operations
Revenues from real estate operations	13,414	9,195
Property operating expenses	(4,636)	(3,735)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	8,778	5,460
Additions to long-lived assets	6,594	235
Transfers from non-operating properties	14,392	76
Real estate operations | Defense/IT Locations | Data Center Shells
Segment financial information for real estate operations
Revenues from real estate operations	6,692	7,505
Property operating expenses	(594)	(1,010)
UJV NOI allocable to COPT	1,642	1,080
NOI from real estate operations	7,740	7,575
Additions to long-lived assets	0	0
Transfers from non-operating properties	3,311	81,203
Real estate operations | Regional Office
Segment financial information for real estate operations
Revenues from real estate operations	16,054	15,082
Property operating expenses	(8,851)	(7,930)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	7,203	7,152
Additions to long-lived assets	3,278	4,333
Transfers from non-operating properties	13	271
Real estate operations | Wholesale Data Center
Segment financial information for real estate operations
Revenues from real estate operations	0	1,980
Property operating expenses	0	(1,025)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	0	955
Additions to long-lived assets	0	(51)
Transfers from non-operating properties	0	0
Real estate operations | Other
Segment financial information for real estate operations
Revenues from real estate operations	2,385	1,826
Property operating expenses	(1,759)	(1,256)
UJV NOI allocable to COPT	0	0
NOI from real estate operations	626	570
Additions to long-lived assets	11	1
Transfers from non-operating properties	0	0
Real estate operations | Segment assets
Segment financial information for real estate operations
Segment assets	3,585,114	3,464,411
Real estate operations | Segment assets | Defense/IT Locations
Segment financial information for real estate operations
Segment assets	3,035,976	2,923,601
Real estate operations | Segment assets | Defense/IT Locations | Fort Meade/BW Corridor
Segment financial information for real estate operations
Segment assets	1,390,273	1,334,119
Real estate operations | Segment assets | Defense/IT Locations | NoVA Defense/IT
Segment financial information for real estate operations
Segment assets	486,649	488,479
Real estate operations | Segment assets | Defense/IT Locations | Lackland Air Force Base
Segment financial information for real estate operations
Segment assets	193,160	197,406
Real estate operations | Segment assets | Defense/IT Locations | Navy Support
Segment financial information for real estate operations
Segment assets	169,235	175,176
Real estate operations | Segment assets | Defense/IT Locations | Redstone Arsenal
Segment financial information for real estate operations
Segment assets	472,237	297,974
Real estate operations | Segment assets | Defense/IT Locations | Data Center Shells
Segment financial information for real estate operations
Segment assets	324,422	430,447
Real estate operations | Segment assets | Regional Office
Segment financial information for real estate operations
Segment assets	545,817	536,909
Real estate operations | Segment assets | Wholesale Data Center
Segment financial information for real estate operations
Segment assets	0	0
Real estate operations | Segment assets | Other
Segment financial information for real estate operations
Segment assets	$ 3,321	$ 3,901

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Information by Business Segment - Reconciliation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reconciliation of segment revenues to total revenues
Construction contract and other service revenues	$ 15,820	$ 53,200
Less: Revenues from discontinued operations	0	(1,980)
Total revenues	167,501	195,480
Operating Expenses [Abstract]
Less: Property operating expenses from discontinued operations	0	(971)
Total property operating expenses	59,420	57,181
Reconciliation of UJV NOI allocable to COPT to Equity Income in Unconsolidated entities [Abstract]
UJV NOI allocable to COPT	1,642	1,080
Less: Income from UJV allocable to COPT attributable to depreciation and amortization expense and interest expense	(1,704)	(758)
Add: Equity in (loss) income of unconsolidated non-real estate entities	(2)	566
Equity in (loss) income of unconsolidated entities	(64)	888
Computation of net operating income from service operations
Construction contract and other service revenues	15,820	53,200
Construction contract and other service expenses	(15,201)	(51,650)
Real estate operations
Reconciliation of segment revenues to total revenues
Total revenues	151,681	144,260
Operating Expenses [Abstract]
Property operating expenses	59,420	58,152
Less: Property operating expenses from discontinued operations	0	(971)
Reconciliation of UJV NOI allocable to COPT to Equity Income in Unconsolidated entities [Abstract]
UJV NOI allocable to COPT	1,642	1,080
Service operations
Computation of net operating income from service operations
NOI from service operations	$ 619	$ 1,550

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Information by Business Segment - Reconciliation of NOI from Real Estate Operations and NOI from Service Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment financial information for real estate operations
Depreciation and other amortization associated with real estate operations	$ (36,995)	$ (34,264)
General, administrative and leasing expenses	(9,995)	(8,544)
Business development expenses and land carry costs	(495)	(783)
Interest expense	(16,442)	(14,424)
Interest and other income	2,323	1,893
Credit loss (expense) recoveries	(67)	316
Gain on sales of real estate	49,378	15
Loss on early extinguishment of debt	0	(342)
Equity in (loss) income of unconsolidated entities	(64)	888
UJV NOI allocable to COPT included in equity in (loss) income of unconsolidated entities	(1,642)	(1,080)
Income tax expense	(125)	(153)
Revenues from real estate operations from discontinued operations	0	(1,980)
Property operating expenses from discontinued operations	0	971
Income from continuing operations	80,398	31,251
Real estate operations
Segment financial information for real estate operations
NOI from real estate operations	93,903	87,188
UJV NOI allocable to COPT included in equity in (loss) income of unconsolidated entities	(1,642)	(1,080)
Property operating expenses from discontinued operations	0	971
Service operations
Segment financial information for real estate operations
NOI from service operations	$ 619	$ 1,550

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Information by Business Segment - Reconciliation of Segment Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Reconciliation of segment assets to total assets
Total consolidated assets	$ 4,177,992	$ 4,257,275	$ 4,132,026
Operating properties lease liabilities included in segment assets	35,327	$ 28,759
Segment assets
Reconciliation of segment assets to total assets
Total consolidated assets	3,585,114		3,464,411
Operating properties lease liabilities included in segment assets	35,327		29,729
Non-operating property assets
Reconciliation of segment assets to total assets
Total consolidated assets	345,518		419,346
Other assets
Reconciliation of segment assets to total assets
Total consolidated assets	$ 212,033		$ 218,540

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Construction Contract and Other Service Revenues - Construction Contracts and Other Service Revenues by Compensation Arrangement and Service Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	$ 15,820	$ 53,200
Construction
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	14,725	52,569
Design
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	606	104
Other
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	489	527
Guaranteed maximum price
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	6,743	47,923
Firm fixed price
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	5,879	3,444
Cost-plus fee
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	2,709	1,306
Other
Disaggregation of Revenue [Line Items]
Construction contract and other service revenues	$ 489	$ 527

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Construction Contract and Other Service Revenues - Rollforwards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Change in Accounts Receivable
Beginning balance	$ 43,334
Ending balance	46,149
Construction Contract Revenue
Change in Accounts Receivable
Beginning balance	7,618	$ 7,193
Ending balance	6,786	4,165
Change in Contract with Customer, Asset
Beginning balance	22,331	22,384
Ending balance	20,619	29,389
Change in Contract with Customer, Liability
Beginning balance	2,867	2,499
Ending balance	3,399	2,534
Portion of beginning balance recognized in revenue during the period	$ 77	$ 26

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Construction Contract and Other Service Revenues - Performance Obligation Narrative (Details) - Construction Contract Revenue $ in Millions	Mar. 31, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 61.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 50.0
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months

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Construction Contract and Other Service Revenues - Narrative (Details) - Construction Contract Revenue - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Deferred incremental costs	$ 0		$ 0
Credit loss (recoveries) expense	$ (65,000)	$ (372,000)

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Credit Losses on Financial Assets and Other Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Credit Losses, Financial Assets and Other Instruments [Roll Forward]
Beginning balance	$ 3,840	$ 3,569
Credit loss expense (recoveries)	67	(316)
Write-offs	(33)
Ending balance	3,874	3,253
Other Assets
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	268	913
Credit loss expense (recoveries)	(57)	(359)
Write-offs	0
Ending balance	211	554
Credit Losses, Financial Assets and Other Instruments [Roll Forward]
Accounts receivable, allowance for credit loss	211	554
Other Assets | Accounts Receivable, Net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	52
Credit Losses, Financial Assets and Other Instruments [Roll Forward]
Accounts receivable, allowance for credit loss
Other Assets | Prepaid expenses and other assets, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	216
Credit Losses, Financial Assets and Other Instruments [Roll Forward]
Accounts receivable, allowance for credit loss
Investing Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,794	1,599
Credit loss expense (recoveries)	143	77
Write-offs	0
Ending balance	2,937	1,676
Tenant Notes Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	778	1,057
Credit loss expense (recoveries)	(19)	(34)
Write-offs	(33)
Ending balance	$ 726	$ 1,023

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Credit Losses on Financial Assets and Other Instruments - Credit Risk Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investing Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	$ 61,092
2019	0
2020	1,931
2021	7,569
2022	17,844
2023	0
Total	88,436	$ 87,415
Investing Receivables | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	61,092
2019	0
2020	1,931
2021	7,569
2022	0
2023	0
Total	70,592
Investing Receivables | Non-investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	0
2019	0
2020	0
2021	0
2022	17,844
2023	0
Total	17,844
Tenant Notes Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	965
2019	112
2020	1,708
2021	0
2022	0
2023	0
Total	2,785
Tenant Notes Receivables | Gross Write-Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	33
2019	0
2020	0
2021	0
2022	0
2023	0
Total	33
Tenant Notes Receivables | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	772
2019	34
2020	176
2021	0
2022	0
2023	0
Total	982
Tenant Notes Receivables | Non-investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	193
2019	78
2020	1,532
2021	0
2022	0
2023	0
Total	1,803
Sales-Type Lease Receivables | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2018 and Earlier	0
2019	0
2020	5,528
2021	0
2022	0
2023	0
Total	$ 5,528

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Share-Based Compensation - (Restricted Shares and TB-PIUs Activity) (Details)	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Restricted shares
Number of Shares
Unvested at the beginning of the period (in shares or units) | shares	325,083
Stock awards granted (in shares or units) | shares	158,242
Forfeited (in shares or units) | shares	(24,510)
Vested (in shares or units) | shares	(124,838)
Unvested at the end of the period (in shares or units) | shares	333,977
Weighted Average Grant Date Fair Value
Unvested at the beginning of the period (in dollars per share or unit) | $ / shares	$ 26.27
Granted (in dollars per share or unit) | $ / shares	25.72
Forfeited (in dollars per share or unit) | $ / shares	25.89
Vested (in dollars per share or unit) | $ / shares	26.02
Unvested at the end of the period (in dollars per share or unit) | $ / shares	$ 26.13
Time-based PIU's
Number of Shares
Unvested at the beginning of the period (in shares or units) | shares	187,330
Stock awards granted (in shares or units) | shares	82,334
Forfeited (in shares or units) | shares	(27,182)
Vested (in shares or units) | shares	(73,869)
Unvested at the end of the period (in shares or units) | shares	168,613
Weighted Average Grant Date Fair Value
Unvested at the beginning of the period (in dollars per share or unit) | $ / shares	$ 26.19
Granted (in dollars per share or unit) | $ / shares	25.72
Forfeited (in dollars per share or unit) | $ / shares	26.46
Vested (in dollars per share or unit) | $ / shares	26.07
Unvested at the end of the period (in dollars per share or unit) | $ / shares	$ 25.97

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Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions			3 Months Ended
	Feb. 01, 2023 shares	Jan. 01, 2023 USD ($) percentile_rank $ / shares shares	Mar. 31, 2023 USD ($) form $ / shares shares
Restricted shares
Share-Based Compensation
Aggregate intrinsic value of awards upon vesting | $			$ 3.2
Stock awards granted (in shares or units) | shares			158,242
Granted (in dollars per share or unit) | $ / shares			$ 25.72
Shares forfeited (in shares) | shares			24,510
Forfeited (in dollars per share or unit) | $ / shares			$ 25.89
PIUs
Share-Based Compensation
Number of forms of profit interest units | form			2
Time-based PIU's
Share-Based Compensation
Aggregate intrinsic value of awards upon vesting | $			$ 1.9
Stock awards granted (in shares or units) | shares			82,334
Granted (in dollars per share or unit) | $ / shares			$ 25.72
Shares forfeited (in shares) | shares			27,182
Forfeited (in dollars per share or unit) | $ / shares			$ 26.46
Performance-based PIU's
Share-Based Compensation
The number of percentile ranks to fall between to earn interpolated PB-PIUs between such percentile ranks, conditioned on the percentile rank exceeding 25% | percentile_rank		2
Percent of award distribution rights		10.00%
Award performance period		3 years
Aggregate grant date fair value | $		$ 4.3
Baseline value per common share (in dollars per share) | $ / shares		$ 25.94
Expected volatility of common shares (as a percent)		35.00%
Risk-free interest rate (as a percent)		4.28%
Shares forfeited (in shares) | shares			126,890
Performance-based PIU's | Target Level
Share-Based Compensation
Granted (in dollars per share or unit) | $ / shares		$ 31.54
Forfeited (in dollars per share or unit) | $ / shares			$ 31.49
Performance-based PIU's | Senior Management Team Members
Share-Based Compensation
Stock awards granted (in shares or units) | shares		275,402
Award vesting period		3 years
Performance-based PIU's | Executives | 2020 PB PIU
Share-Based Compensation
Units issued for awards vested in period (in units) | shares	141,152

XML

Share-Based Compensation - Schedule of payouts for defined performance under PB-PIUs (Details) - Performance-based PIU's	Jan. 01, 2023
Potential earned PSUs payout for defined levels of performance under awards
Earned PB-PIUs payout (as a percent of PB-PIUs granted) on 75th or greater percentile rank	100.00%
Earned PB-PIUs payout (as a percent of PB-PIUs granted) on 50th percentile rank	50.00%
Earned PB-PIUs payout (as a percent of PB-PIUs granted) on 25th percentile rank	25.00%
Earned PB-PIUs granted on percentile rank below 25th (as a percent)	0.00%

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Earnings Per Share ("EPS") - Summary Of Calculation Of Numerator and Denominator in Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Numerator:
Income from continuing operations		$ 80,398	$ 31,251
Income from continuing operations attributable to noncontrolling interests		(1,619)	(1,084)
Income from continuing operations attributable to share-based compensation awards for basic EPS		(297)	(116)
Numerator for basic EPS from continuing operations attributable to common shareholders		78,482	30,051
Redeemable noncontrolling interests		(64)	(39)
Adjustment to income from continuing operations attributable to share-based compensation awards for diluted EPS		49	18
Numerator for diluted EPS from continuing operations attributable to common shareholders		78,467	30,030
Discontinued operations		0	29,573
Discontinued operations attributable to noncontrolling interests		0	(421)
Income from discontinued operations attributable to share-based compensation awards for diluted EPS		0	(83)
Numerator for diluted EPS on net income attributable to common shareholders		$ 78,467	$ 59,099
Denominator (all weighted averages):
Denominator for basic EPS (common shares)		112,127	112,020
Dilutive effect of redeemable noncontrolling interests (in shares)		91	132
Dilutive effect of share-based compensation awards (in shares)		410	426
Denominator for diluted EPS (common shares)		112,628	112,578
Basic EPS attributable to common shareholders:
Income from continuing operations - basic (in dollars per share)	[1]	$ 0.70	$ 0.27
Discontinued operations - basic (in dollars per share)	[1]	0	0.26
Net income attributable to common shareholders - basic (in dollars per share)	[1]	0.70	0.53
Diluted EPS attributable to common shareholders:
Income from continuing operations - diluted (in dollars per share)	[1]	0.70	0.27
Discontinued operations - diluted (in dollars per share)		0	0.25
Net income attributable to common shareholders - diluted (in dollars per share)	[1]	$ 0.70	$ 0.52

[1] Basic and diluted earnings per common share are calculated based on amounts attributable to common shareholders.

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Earnings Per Share ("EPS") - Schedule of Securities Excluded From Computation Of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Conversion of common units
Antidilutive securities
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares)	1,489	1,384
Conversion of redeemable noncontrolling interests
Antidilutive securities
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares)	972	806
Weighted average restricted shares and deferred shares
Antidilutive securities
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares)	398	399
Weighted average TB-PIUs
Antidilutive securities
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares)	181	172
Weighted Average Vested PIUs
Antidilutive securities
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares)	103

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Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2023 USD ($) property
Commitments and Contingencies
Estimate of possible loss	$ 4.1
Environmental Indemnity Agreement
Number of lease properties which were provided environmental indemnifications | property	3
Maximum environmental indemnification to the tenant against consequential damages after acquisition of property	$ 19.0
Anne Arundel County, Maryland | Tax Incremental Financing Bond
Environmental Indemnity Agreement
Maximum exposure	$ 29.0