Consolidated Statements of Cash Flows (Unaudited) - USD ($)		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income		$ 45,799,000	$ 38,640,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of lease costs		37,852,000	37,593,000
Amortization of deferred debt costs		1,237,000	1,163,000
Compensation costs of stock and option grants		1,197,000	1,141,000
Credit losses on operating lease receivables		802,000	4,162,000
(Increase) decrease in accounts receivable and accrued income		2,260,000	(17,552,000)
Additions to deferred leasing costs		(1,316,000)	(7,383,000)
Increase in other assets		(4,124,000)	(2,286,000)
Increase in accounts payable, accrued expenses and other liabilities		2,432,000	3,871,000
Increase (decrease) in deferred income		2,923,000	(2,579,000)
Net cash provided by operating activities		89,062,000	56,770,000
Cash flows from investing activities:
Payments to Acquire Other Real Estate	[1],[2],[3]	(9,011,000)	0
Additions to real estate investments		(14,593,000)	(13,665,000)
Additions to development and redevelopment projects		(15,227,000)	(34,698,000)
Net cash used in investing activities		(38,831,000)	(48,363,000)
Cash flows from financing activities:
Proceeds from notes payable		0	52,100,000
Repayments on notes payable		(33,670,000)	(37,431,000)
Repayments on revolving credit facility		(42,500,000)	(53,000,000)
Proceeds from construction loan		2,430,000	32,928,000
Additions to deferred debt costs		(3,474,000)	(1,196,000)
Proceeds from the issuance of:
Common stock		8,717,000	5,440,000
Partnership units (1) (2) (3)	[1],[2],[3]	1,775,000	1,114,000
Distributions to:
Common stockholders		(37,926,000)	(37,012,000)
Noncontrolling interests		(13,127,000)	(12,556,000)
Net cash provided by (used in) financing activities		(65,170,000)	31,993,000
Net increase (decrease) in cash and cash equivalents		(14,939,000)	40,400,000
Cash and cash equivalents, beginning of period		26,856,000	13,905,000
Cash and cash equivalents, end of period		11,917,000	54,305,000
Supplemental disclosure of cash flow information:
Cash paid for interest		33,738,000	32,951,000
Increase (decrease) in accrued real estate investments and development costs		504,000	(11,196,000)
Secured Debt
Cash flows from financing activities:
Proceeds from revolving credit facility		25,000,000	0
Revolving Credit Facility
Cash flows from financing activities:
Proceeds from revolving credit facility		36,000,000	90,000,000
Twinbrook Quarter
Supplemental disclosure of cash flow information:
Limited partnership units issued		79,300
Twinbrook Metro Station Leasehold Interest
Supplemental disclosure of cash flow information:
Limited partnership units issued		21,500
Ashbrook Marketplace
Supplemental disclosure of cash flow information:
Limited partnership units issued		4,320
Series D Cumulative Redeemable Preferred Stock
Distributions to:
Preferred stockholders		(3,445,000)	(3,444,000)
Series E Cumulative Redeemable Preferred Stock
Distributions to:
Preferred stockholders		$ (4,950,000)	$ (4,950,000)

[1] The 2021 acquisition of real estate and proceeds from the issuance of partnership units each excludes $21,500 in connection with the contribution of the Twinbrook Quarter leasehold interest in exchange for limited partnership units. See Notes 3 and 4 to the Consolidated Financial Statements.

[2] The 2021 acquisition of real estate and proceeds from the issuance of partnership units each excludes $4,320 in connection with the issuance of additional limited partnership units to B. F. Saul Real Estate Investment Trust as additional consideration pursuant to the terms of the 2016 contribution agreement, as amended, related to Ashbrook Marketplace. See Note 7 to the Consolidated Financial Statements.

[3] The 2021 acquisition of real estate and proceeds from the issuance of partnership units each excludes $79,300 in connection with the contribution of Twinbrook Quarter by the B. F. Saul Real Estate Investment Trust in exchange for limited partnership units that are held in escrow. See Notes 3 and 4 to the Consolidated Financial Statements.