Cedar Realty Trust (CDR-PB) 10-K 11 Feb 21 2020 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 01, 2021	Jun. 30, 2020
Document Information [Line Items]
Document type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Entity Registrant Name	CEDAR REALTY TRUST, INC.
Entity Central Index Key	0000761648
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 84,667,000
Entity File Number	001-31817
Entity Tax Identification Number	42-1241468
Entity Address, Address Line One	44 South Bayles Avenue
Entity Address, City or Town	Port Washington
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11050-3765
City Area Code	516
Local Phone Number	767-6492
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	MD
Document Annual Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		13,569,329
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE: Portions of the registrant’s definitive proxy statement relating to its 2021 annual meeting of shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K .
Common Stock [Member]
Document Information [Line Items]
Trading Symbol	CDR
Title of 12(b) Security	Common Stock, $0.06 par value
Security Exchange Name	NYSE
Series B Preferred Stock [Member]
Document Information [Line Items]
Trading Symbol	CDRpB
Title of 12(b) Security	7-1/4% Series B Cumulative Redeemable Preferred Stock, $25.00 Liquidation Value
Security Exchange Name	NYSE
Series C Preferred Stock [Member]
Document Information [Line Items]
Trading Symbol	CDRpC
Title of 12(b) Security	6-1/2% Series C Cumulative Redeemable Preferred Stock, $25.00 Liquidation Value
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Land	$ 284,694,000	$ 293,456,000
Buildings and improvements	1,242,784,000	1,221,750,000
Real estate, gross	1,527,478,000	1,515,206,000
Less accumulated depreciation	(428,569,000)	(389,861,000)
Real estate, net	1,098,909,000	1,125,345,000
Real estate held for sale	9,498,000	13,230,000
Cash and cash equivalents	1,637,000	2,747,000
Receivables	21,952,000	22,164,000
Other assets and deferred charges, net	45,255,000	42,139,000
TOTAL ASSETS	1,177,251,000	1,205,625,000
LIABILITIES AND EQUITY
Mortgage loan payable	45,385,000	46,370,000
Finance lease obligation	5,340,000	5,364,000
Unsecured revolving credit facility	175,000,000	106,000,000
Unsecured term loans	398,549,000	472,841,000
Accounts payable and accrued liabilities	56,580,000	50,502,000
Unamortized intangible lease liabilities	8,939,000	10,473,000
Total liabilities	689,793,000	691,550,000
Commitments and contingencies
Equity:
Preferred stock	159,541,000	159,541,000
Common stock ($0.06 par value, 150,000,000 shares authorized, 13,530,000 and 13,488,000 shares, issued and outstanding, respectively)	812,000	809,000
Treasury stock (447,000 and 465,000 shares, respectively, at cost)	(15,133,000)	(16,311,000)
Additional paid-in capital	879,790,000	877,256,000
Cumulative distributions in excess of net income	(522,696,000)	(503,725,000)
Accumulated other comprehensive (loss)	(18,816,000)	(7,009,000)
Total Cedar Realty Trust, Inc. shareholders' equity	483,498,000	510,561,000
Noncontrolling interests:
Minority interests in consolidated joint ventures	1,053,000	435,000
Limited partners' OP Units	2,907,000	3,079,000
Total noncontrolling interests	3,960,000	3,514,000
Total equity	487,458,000	514,075,000
TOTAL LIABILITIES AND EQUITY	$ 1,177,251,000	$ 1,205,625,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Common stock, shares par value	$ 0.06	$ 0.06
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	13,530,000	13,488,000
Common stock, shares outstanding	13,530,000	13,488,000
Treasury stock, shares	447,000	465,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
REVENUES
Total revenues	$ 135,538,000	$ 144,083,000	$ 152,020,000
EXPENSES
Operating, maintenance and management	25,545,000	27,593,000	27,771,000
Real estate and other property-related taxes	20,051,000	20,754,000	20,123,000
General and administrative	16,865,000	18,804,000	16,915,000
Depreciation and amortization	48,412,000	45,861,000	40,053,000
Total expenses	110,873,000	113,012,000	104,862,000
OTHER
Gain on sales	4,396,000	2,942,000	4,864,000
Impairment charges	(7,607,000)	(8,938,000)	(20,689,000)
Total other	(3,211,000)	(5,996,000)	(15,825,000)
OPERATING INCOME	21,454,000	25,075,000	31,333,000
NON-OPERATING INCOME AND EXPENSES
Interest expense	(21,974,000)	(23,509,000)	(22,146,000)
Early extinguishment of debt costs			(4,829,000)
Total non-operating income and expenses	(21,974,000)	(23,509,000)	(26,975,000)
NET (LOSS) INCOME	(520,000)	1,566,000	4,358,000
Net (income) loss attributable to noncontrolling interests:
Minority interests in consolidated joint ventures	(618,000)	(547,000)	(497,000)
Limited partners' interest in Operating Partnership	66,000	57,000	28,000
Total net (income) attributable to noncontrolling interests	552,000	490,000	469,000
NET (LOSS) INCOME ATTRIBUTABLE TO CEDAR REALTY TRUST, INC.	(1,072,000)	1,076,000	3,889,000
Preferred stock dividends	(10,752,000)	(10,752,000)	(10,863,000)
Preferred stock redemption costs			(3,507,000)
NET (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ (11,824,000)	$ (9,676,000)	$ (10,481,000)
NET (LOSS) PER COMMON SHARE ATTRIBUTABLE TO COMMON SHAREHOLDERS (BASIC AND DILUTED):	$ (0.92)	$ (0.78)	$ (0.83)
Weighted average number of common shares - basic and diluted	13,104,000	13,082,000	13,397,000
Rental Revenues [Member]
REVENUES
Total revenues	$ 127,171,000	$ 142,719,000	$ 147,236,000
Other [Member]
REVENUES
Total revenues	$ 8,367,000	$ 1,364,000	$ 4,784,000

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (520,000)	$ 1,566,000	$ 4,358,000
Unrealized (loss) gain on change in fair value of cash flow hedges	(11,878,000)	(14,286,000)	1,518,000
Comprehensive (loss) income	(12,398,000)	(12,720,000)	5,876,000
Comprehensive (income) attributable to noncontrolling interests	(481,000)	(404,000)	(490,000)
Comprehensive (loss) income attributable to Cedar Realty Trust, Inc.	$ (12,879,000)	$ (13,124,000)	$ 5,386,000

Consolidated Statement of Equit

Consolidated Statement of Equity - USD ($)	Total	Limited Partners' Interest In Operating Partnership [Member]	Restated [Member]	Restated [Member]Limited Partners' Interest In Operating Partnership [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Restated [Member]	Preferred Stock [Member]	Preferred Stock [Member]Restated [Member]	Common Stock [Member]	Common Stock [Member]Restated [Member]	Treasury Stock, At Cost [Member]	Treasury Stock, At Cost [Member]Restated [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member]Restated [Member]	Cumulative Distributions In Excess Of Net Income [Member]	Cumulative Distributions In Excess Of Net Income [Member]Restated [Member]	Cumulative Distributions In Excess Of Net Income [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]Restated [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]Restated [Member]	Cedar Realty Trust, Inc. [Member]	Cedar Realty Trust, Inc. [Member]Restated [Member]	Cedar Realty Trust, Inc. [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]Restated [Member]	Minority Interests In Consolidated Joint Ventures [Member]	Minority Interests In Consolidated Joint Ventures [Member]Restated [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member]Restated [Member]
Balance at Dec. 31, 2017	$ 630,111,000	$ 2,384,000				$ 207,508,000		$ 830,000		$ (18,463,000)		$ 879,711,000		$ (446,944,000)			$ 5,694,000		$ 628,336,000			$ (609,000)		$ 1,775,000
Balance, shares at Dec. 31, 2017						8,450,000		13,836,000
Net (loss) income	4,358,000	(28,000)												3,889,000					3,889,000			497,000		469,000
Unrealized gain (loss) on change in fair value of cash flow hedges	1,518,000	21,000															1,497,000		1,497,000					21,000
Share-based compensation, net	3,351,000							$ (1,000)		1,891,000		1,461,000							3,351,000
Share-based compensation, net, shares								(17,000)
Redemptions of Series B Shares	(50,016,000)					$ (47,967,000)						1,458,000		(3,507,000)					(50,016,000)
Redemptions of Series B Shares, Shares						(2,000,000)
Common stock sales, net of issuance expenses	9,000											9,000							9,000
Common stock repurchases	(2,329,000)							$ (7,000)				(2,322,000)							(2,329,000)
Common stock repurchases. Shares								(117,000)
Preferred stock dividends	(10,863,000)													(10,863,000)					(10,863,000)
Distributions to common shareholders/noncontrolling interests	(18,391,000)	(90,000)												(18,301,000)					(18,301,000)					(90,000)
Redemption of OP Units	(7,000)	(7,000)																						(7,000)
Issuance of OP Units	975,000	975,000																						975,000
Reallocation adjustment of limited partners' interest		148,000										(148,000)							(148,000)					148,000
Balance at Dec. 31, 2018	558,716,000	3,403,000	$ 558,201,000	$ 3,403,000		$ 159,541,000	$ 159,541,000	$ 822,000	$ 822,000	(16,572,000)	$ (16,572,000)	880,169,000	$ 880,169,000	(475,726,000)	$ (476,241,000)		7,191,000	$ 7,191,000	555,425,000	$ 554,910,000		(112,000)	$ (112,000)	3,291,000	$ 3,291,000
Balance, shares at Dec. 31, 2018						6,450,000	6,450,000	13,702,000	13,702,000
Prior period adjustment - adoption of lease accounting standard | Accounting Standards Update 2016-02 [Member]					$ (515,000)											$ (515,000)					$ (515,000)
Net (loss) income	1,566,000	(57,000)												1,076,000					1,076,000			547,000		490,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(14,286,000)	(86,000)															(14,200,000)		(14,200,000)					(86,000)
Share-based compensation, net	4,129,000							$ 6,000		261,000		3,862,000							4,129,000
Share-based compensation, net, shares								95,000
Common stock sales, net of issuance expenses	23,000											23,000							23,000
Common stock sales, net of issuance expenses, shares								2,000
Common stock repurchases	(6,844,000)							$ (19,000)				(6,825,000)							(6,844,000)
Common stock repurchases. Shares								(311,000)
Preferred stock dividends	(10,752,000)													(10,752,000)					(10,752,000)
Distributions to common shareholders/noncontrolling interests	(17,919,000)	(111,000)												(17,808,000)					(17,808,000)					(111,000)
Redemption of OP Units	(43,000)	(43,000)																						(43,000)
Reallocation adjustment of limited partners' interest		(27,000)										27,000							27,000					(27,000)
Balance at Dec. 31, 2019	514,075,000	3,079,000				$ 159,541,000		$ 809,000		(16,311,000)		877,256,000		(503,725,000)			(7,009,000)		510,561,000			435,000		3,514,000
Balance, shares at Dec. 31, 2019						6,450,000		13,488,000
Net (loss) income	(520,000)	(66,000)												(1,072,000)					(1,072,000)			618,000		552,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(11,878,000)	(71,000)															(11,807,000)		(11,807,000)					(71,000)
Share-based compensation, net	3,709,000							$ 3,000		1,178,000		2,528,000							3,709,000
Share-based compensation, net, shares								40,000
Common stock sales, net of issuance expenses	13,000											13,000							13,000
Common stock sales, net of issuance expenses, shares								2,000
Preferred stock dividends	(10,752,000)													(10,752,000)					(10,752,000)
Distributions to common shareholders/noncontrolling interests	(7,189,000)	(42,000)												(7,147,000)					(7,147,000)					(42,000)
Reallocation adjustment of limited partners' interest		7,000										(7,000)							(7,000)					7,000
Balance at Dec. 31, 2020	$ 487,458,000	$ 2,907,000				$ 159,541,000		$ 812,000		$ (15,133,000)		$ 879,790,000		$ (522,696,000)			$ (18,816,000)		$ 483,498,000			$ 1,053,000		$ 3,960,000
Balance, shares at Dec. 31, 2020						6,450,000		13,530,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
OPERATING ACTIVITIES
Net (loss) income	$ (520,000)	$ 1,566,000	$ 4,358,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Gain on sales	(4,396,000)	(2,942,000)	(4,864,000)
Impairment charges	7,607,000	8,938,000	20,689,000
Extinguishment of debt costs			4,829,000
Straight-line rents and expenses, net	1,279,000	(265,000)	(1,142,000)
Provision for doubtful accounts	1,478,000	412,000	2,273,000
Depreciation and amortization	48,412,000	45,861,000	40,053,000
Amortization of intangible lease liabilities, net	(1,373,000)	(2,827,000)	(4,361,000)
Expense relating to share-based compensation, net	3,723,000	4,117,000	3,763,000
Amortization of premium on mortgage loans payable			(80,000)
Amortization of deferred financing costs	1,331,000	1,286,000	1,224,000
Changes in operating assets and liabilities, net of effects of acquisitions and dispositions:
Rents and other receivables	(2,811,000)	(812,000)	(3,902,000)
Prepaid expenses and other	(9,216,000)	(3,037,000)	(6,591,000)
Accounts payable and accrued liabilities	(2,934,000)	1,378,000	1,651,000
Net cash provided by operating activities	42,580,000	53,675,000	57,900,000
INVESTING ACTIVITIES
Expenditures for real estate improvements	(39,551,000)	(31,910,000)	(30,377,000)
Net proceeds from sales of real estate	21,182,000	18,651,000	19,118,000
Acquisition of real estate		(9,083,000)	(179,000)
Issuance of mortgage note receivable			(3,500,000)
Net cash (used in) investing activities	(18,369,000)	(22,342,000)	(14,938,000)
FINANCING ACTIVITIES
Repayments under revolving credit facility	(104,000,000)	(21,000,000)	(123,500,000)
Advances under revolving credit facility	173,000,000	27,000,000	168,500,000
Repayment under term loan	(75,000,000)
Advance under term loan			75,000,000
Mortgage repayments	(1,067,000)	(1,027,000)	(80,330,000)
Payment of early extinguishment of debt costs			(5,159,000)
Payments of debt financing costs	(326,000)		(705,000)
Noncontrolling interests:
Distributions to limited partners	(42,000)	(111,000)	(90,000)
Redemption of OP Units		(43,000)	(7,000)
Redemption on preferred stock			(50,016,000)
Common stock sales less issuance expenses, net	13,000	22,000	9,000
Common stock repurchases		(6,844,000)	(2,329,000)
Preferred stock dividends	(10,752,000)	(10,752,000)	(11,276,000)
Distributions to common shareholders	(7,147,000)	(17,808,000)	(18,301,000)
Net cash (used in) financing activities	(25,321,000)	(30,563,000)	(48,204,000)
Net (decrease) increase in cash, cash equivalents and restricted cash	(1,110,000)	770,000	(5,242,000)
Cash, cash equivalents and restricted cash at beginning of year	2,747,000	1,977,000	7,219,000
Cash, cash equivalents and restricted cash at end of year	1,637,000	2,747,000	1,977,000
Reconciliation to consolidated balance sheets:
Cash and cash equivalents	1,637,000	2,747,000	1,977,000
Cash, cash equivalents and restricted cash at end of year	$ 1,637,000	$ 2,747,000	$ 1,977,000

Business and Organization

Business and Organization	12 Months Ended
	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business and Organization	Note 1. Business and Organization Cedar Realty Trust, Inc. (the "Company") is a real estate investment trust ("REIT") that focuses primarily on ownership, operation and redevelopment of grocery-anchored shopping centers in high-density urban markets from Washington, D.C. to Boston. At December 31, 2020, the Company owned and managed a portfolio of 54 operating properties (excluding properties “held for sale”). Cedar Realty Trust Partnership, L.P. (the "Operating Partnership") is the entity through which the Company conducts substantially all of its business and owns (either directly or through subsidiaries) substantially all of its assets. At December 31, 2020, the Company owned a 99.4% general and limited partnership interest in, and was the sole general partner of, the Operating Partnership. The limited partners’ interest in the Operating Partnership (0.6% at December 31, 2020) is represented by partnership units in the Operating Partnership (“OP Units”). The carrying amount of such interest is adjusted at the end of each reporting period to an amount equal to the limited partners’ ownership percentage of the Operating Partnership’s net equity. The 81,000 OP Units are economically equivalent to the Company’s common stock. The holders of OP Units have the right to exchange their OP Units for the same number of shares of the Company’s common stock or, at the Company’s option, for cash. Unless specifically noted otherwise, all references to OP Units exclude limited partnership units held by the Company. As used herein, the "Company" refers to Cedar Realty Trust, Inc. and its subsidiaries on a consolidated basis, including the Operating Partnership or, where the context so requires, Cedar Realty Trust, Inc. only.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Reverse Stock Split On November 25, 2020, the Company effected a 1-for-6.6 , Principles of Consolidation/Basis of Preparation The consolidated financial statements include the accounts and operations of the Company, the Operating Partnership, its subsidiaries, and certain joint venture partnerships in which it participates. The Company consolidates all variable interest entities (“VIEs”) for which it is the primary beneficiary. Generally, a VIE is an entity with one or more of the following characteristics: (1) the total equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (2) as a group, the holders of the equity investment at risk (a) lack the power through voting or similar rights to make decisions about the entity’s activities that significantly impact the entity’s performance, (b) have no obligation to absorb the expected losses of the entity, or (c) have no right to receive the expected residual returns of the entity, or (3) the equity investors have voting rights that are not proportional to their economic interests, and substantially all of the entity’s activities either involve, or are conducted on behalf of, an investor that has disproportionately fewer voting rights. Significant judgments related to these determinations include estimates about the current values, performance of real estate held by these VIEs, and general market conditions. The Financial Accounting Standards Board (“FASB”) issued guidance which amended the consolidation requirements, including introducing a separate consolidation analysis specific to limited partnerships and other similar entities. Under the analysis, limited partnerships and other similar entities will be considered variable interest entities unless the limited partners hold substantive kick-out rights or participating rights. The guidance was adopted on January 1, 2016. The Company evaluated its existing joint venture property at San Souci Plaza based on the new guidance, determined the entity to be a variable interest entity, and continued to consolidate the entity. At December 31, 2020, this VIE owned real estate with a carrying value of $25.4 million and no mortgage loan payable. The Company has a 60%-owned joint venture originally formed to develop the project known as Crossroads II. This joint venture is consolidated as it is deemed to be a VIE and the Company is the primary beneficiary. The Company (1) guaranteed all related debt, (2) does not require its partners to fund additional capital requirements, (3) has an economic interest greater than its voting proportion and (4) directs the management activities that significantly impact the performance of the joint venture. At December 31, 2020, this VIE owned real estate with a carrying value of $36.9 million and no mortgage loan payable. The accompanying financial statements are prepared on the accrual basis in accordance with accounting principles generally accepted in the United States (“GAAP”), which requires management to make estimates and assumptions that affect the disclosure of contingent assets and liabilities, the reported amounts of assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the periods covered by the financial statements. Actual results could differ from these estimates. Real Estate Investments Real estate investments are carried at cost less accumulated depreciation. The provision for depreciation is calculated using the straight-line method based upon the estimated useful lives of the respective assets of between 3 and 40 years, with buildings being depreciated at the upper end of the range. Depreciation expense amounted to $43.6 million, $41.8 million and $36.1 million for 2020, 2019 and 2018, respectively. Expenditures for betterments that substantially extend the useful lives of the assets are capitalized. Expenditures for maintenance, repairs, and betterments that do not substantially prolong the normal useful life of an asset are charged to operations as incurred. Real estate investments include costs of development and redevelopment activities, and construction in progress. Capitalized costs, including interest and other carrying costs during the construction and/or renovation periods, are included in the cost of the related asset and charged to operations through depreciation over the asset’s estimated useful life. A variety of costs are incurred in the development and leasing of a property, such as pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs, and other costs incurred during the period of development. After a determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. The Company ceases capitalization on the portions substantially completed and occupied, or held available for occupancy, and capitalizes only those costs associated with the portions under development. The Company considers a construction project to be substantially completed and held available for occupancy upon the completion of tenant improvements, but not later than one year from cessation of major construction activity. The Company allocates the fair value of real estate acquired to land, buildings and improvements. In addition, the fair value of in-place leases is allocated to intangible lease assets and liabilities. The fair value of the tangible assets of an acquired property is determined by valuing the property as if it were vacant, which value is then allocated to land, buildings and improvements based on management’s determination of the fair values of these assets. In valuing an acquired property’s intangibles, factors considered by management include an estimate of carrying costs during the expected lease-up periods, such as real estate taxes, insurance, other operating expenses, and estimates of lost rental revenue during the expected lease-up periods based on its evaluation of current market demand. Management also estimates costs to execute similar leases, including leasing commissions, tenant improvements, legal and other related costs. The values of acquired above-market and below-market leases are recorded based on the present values (using discount rates which reflect the risks associated with the leases acquired) of the differences between the contractual amounts to be received and management’s estimate of market lease rates, measured over the terms of the respective leases that management deemed appropriate at the time of the acquisitions. Such valuations include consideration of the non-cancellable terms of the respective leases as well as any applicable renewal periods. The fair values associated with below-market rental renewal options are determined based on the Company’s experience and the relevant facts and circumstances that existed at the time of the acquisitions. The values of above-market leases are amortized to rental income over the terms of the respective non-cancelable lease periods. The portion of the values of below-market leases associated with the original non-cancelable lease terms are amortized to rental income over the terms of the respective non-cancelable lease periods. The portion of the values of the leases associated with below-market renewal options that are likely of exercise are amortized to rental income over the respective renewal periods. The value of other intangible assets (including leasing commissions, tenant improvements, etc.) is amortized to expense over the applicable terms of the respective leases. If a lease were to be terminated prior to its stated expiration or not renewed, all unamortized amounts relating to that lease would be recognized in operations at that time. Management reviews each real estate investment for impairment whenever events or circumstances indicate that the carrying value of a real estate investment may not be recoverable. The review of recoverability of real estate investments held for use is based on an estimate of the future cash flows that are expected to result from the real estate investment’s use and eventual disposition. These cash flows consider factors such as expected future operating income, trends and prospects, as well as the effects of leasing demand, capital expenditures, competition and other factors. If an impairment event exists due to the projected inability to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds estimated fair value. Effective January 1, 2018, the Company has adopted the guidance on gains and losses from the derecognition of nonfinancial assets. This guidance applies to all nonfinancial assets (including real estate) for which the counterparty is not a customer and also clarifies that all businesses are derecognized using the deconsolidation guidance. Additionally, it defines an in substance nonfinancial asset as a financial asset that is promised to a counterparty in a contract in which substantially all of the fair value of the asset promised in the contract is concentrated in nonfinancial assets, which excludes cash or cash equivalents and liabilities. Properties Held For Sale The Company follows the guidance for reporting discontinued operations, whereby a disposal of an individual property or group of properties is required to be reported in “discontinued operations” only if the disposal represents a strategic shift that has, or will have, a major effect on the Company’s operations and financial results. The results of operations for those properties not meeting such criteria are reported in “continuing operations” in the consolidated statements of operations. The carrying values of the assets and liabilities of properties determined to be held for sale, principally the net book values of the real estate and the related mortgage loans payable expected to be assumed by the buyers, are reclassified as “held for sale” on the Company’s consolidated balance sheets at the time such determinations are made, on a prospective basis only. In addition, the Company anticipates that sales of all such properties remaining classified as “held for sale” at the balance sheet date will be concluded within one year from such date. The Company, when applicable, conducts a continuing review of the values for all properties “held for sale” based on final sales prices and sales contracts entered into. Impairment charges/reversals, if applicable, are based on a comparison of the carrying values of the properties with either (1) actual sales prices less costs to sell for properties sold, or contract amounts for properties in the process of being sold, (2) estimated sales prices, less costs to sell, based on discounted cash flow analyses, if no contract amounts are being negotiated (see Note 4 - “Fair Value Measurements”), or (3) with respect to land parcels, estimated sales prices, less costs to sell, based on comparable sales completed in the selected market areas. Prior to the Company’s determination to dispose of properties, which are subsequently reclassified to “held for sale”, the Company performed recoverability analyses based on the estimated undiscounted cash flows that were expected to result from the real estate investments’ use and eventual disposal. The projected undiscounted cash flows of each property reflects that the carrying value of each real estate investment would be recovered. However, as a result of the properties’ meeting the “held for sale” criteria, such properties were written down to the lower of their carrying value and estimated fair values less costs to sell. Cash and Cash Equivalents / Restricted Cash Cash and cash equivalents consist of cash in banks and short-term investments with original maturities when purchased of less than ninety days, and include cash at consolidated joint ventures of $0.2 million and $0.3 million at December 31, 2020 and 2019, respectively. The terms of mortgage loans payable may require the Company to deposit certain replacement and other reserves with its lenders. Such “restricted cash” is generally available only for property-level requirements for which the reserves have been established. Fair Value Measurements The accounting guidance for fair value measurement establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels: • Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2 – Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. • Level 3 – Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible while also considering counterparty credit risk in the assessment of fair value. Revenue Recognition and Receivables Management has determined that all of the Company’s leases with its various tenants are operating leases. Rental income with scheduled rent increases is recognized using the straight-line method over the respective non-cancelable terms of the leases. The aggregate excess of rental revenue recognized on a straight-line basis over the contractual base rents is included in receivables on the consolidated balance sheet. Leases also generally contain provisions under which the tenants reimburse the Company for a portion of property operating expenses and real estate taxes incurred, generally attributable to their respective allocable portions of gross leasable area. Such income is recognized in the periods earned. In addition, a limited number of operating leases contain contingent rent provisions under which tenants are required to pay, as additional rent, a percentage of their sales in excess of a specified amount. The Company defers recognition of contingent rental income until those specified sales targets are met. Revenues also include items such as lease termination fees, which tend to fluctuate more than rents from year to year. Termination fees are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration. The Company recognizes lease termination income when the following conditions are met: (1) the lease termination agreement has been executed, (2) the lease termination fee is determinable, (3) all the Company’s landlord services pursuant to the terminated lease have been rendered, and (4) collectability of the lease termination fee is assured. In November 2018, the FASB clarified the existing accounting treatment relating to receivables arising from operating leases, stating that such receivables are not within the scope of the expected credit loss standard and that impairment of receivables arising from operating leases should be accounted for in accordance with the recently-adopted lease accounting standard. This required the Company, as of January 1, 2019, to review its existing lease portfolio to determine if all future lease payments are probable of collection and, if the Company determined that all future lease payments are not probable of collection, the Company will account for these leases on a cash basis. This required that all amounts that were historically recorded as bad debt expense, and previously included in operating expenses in the Company’s consolidated statement of operations, now be recorded as a direct reduction of rental revenues. In accordance with this guidance, $8.3 million and $2.4 million of rental revenue relating to certain leases that were no longer deemed probable of collection were not recorded as rental revenue for the years ended December 31, 2020 and 2019, respectively. Of these amounts, $1.4 million and $0.3 million, respectively, represented deferred rent receivables that were written-off for the years ended December 31, 2020 and 2019. Prior to January 1, 2019, the Company made estimates as to the collectability of its accounts receivable related to base rent, straight-line rent, percentage rent, expense reimbursements and other revenues. When management analyzed accounts receivable and evaluated the adequacy of the allowance for doubtful accounts, it considered such things as historical bad debts, tenant creditworthiness, current economic trends, current developments relevant to a tenant’s business specifically and to its business category generally, and changes in tenants’ payment patterns. The allowance for doubtful accounts was $1.4 million and $0.6 million at December 31, 2020 and 2019, respectively. The provision for doubtful accounts (included in operating, maintenance and management expenses) was $1.5 million, $0.4 million and $2.2 million in 2020, 2019 and 2018, respectively. Segment Information The Company’s primary business is the ownership and operation of grocery-anchored shopping centers Company’s revenues or property operating income, and the Company has no operations outside of the United States of America. Therefore, the Company has aggregated its properties into one reportable segment as the properties share similar long-term economic characteristics and have other similarities including the fact that they are operated using consistent business strategies, are typically located in major metropolitan areas, and have similar tenant mixes. Income Taxes The Company, organized in 1984, has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). A REIT will generally not be subject to federal income taxation on that portion of its income that qualifies as REIT taxable income, to the extent that it distributes at least 90% of such REIT taxable income to its stockholders and complies with certain other requirements. As of December 31, 2020, the Company was in compliance with all REIT requirements. The Company follows a two-step approach for evaluating uncertain federal, state and local tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that more-likely-than-not will be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The Company has not identified any uncertain tax positions which would require an accrual. Derivative Financial Instruments The Company occasionally utilizes derivative financial instruments, principally interest rate swaps, to manage its exposure to fluctuations in interest rates. The Company has established policies and procedures for risk assessment, and the approval, reporting and monitoring of derivative financial instruments. Derivative financial instruments must be effective in reducing the Company’s interest rate risk exposure in order to qualify for hedge accounting. When the terms of an underlying transaction are modified, or when the underlying hedged item ceases to exist, all changes in the fair value of the instrument are marked-to-market with changes in value included in net income for each period until the derivative financial instrument matures or is settled. Any derivative financial instrument used for risk management that does not meet the hedging criteria is marked-to-market with the changes in value included in net income. The Company has not entered into, and does not plan to enter into, derivative financial instruments for trading or speculative purposes. Share-Based Compensation During 2017, the Company’s shareholders approved the 2017 Stock Incentive Plan (the “2017 Plan”), which replaced the Company’s 2012 Stock Incentive Plan (the “2012 Plan”). As of the effective date of the 2017 Plan, the Company may not grant any further awards under the 2012 Plan. The 2017 Plan establishes the procedures for the granting of, among other things, restricted stock awards. On May 1, 2019, the Company’s shareholders approved an amendment to the 2017 Plan, which increased the maximum number of shares of the Company’s common stock that may be issued pursuant to the 2017 Plan by 303,000 shares, to a new total of 909,000 shares (see Note 14 – “Share-Based Compensation”), and the maximum number of shares that may be granted to a participant in any calendar year may not exceed 76,000. All grants issued pursuant to the 2017 Plan generally vest (1) at the end of designated time periods for time-based grants, or (2) upon the completion of a designated period of performance for performance-based grants and satisfaction of performance criteria. Time–based grants are valued according to the market price for the Company’s common stock at the date of grant. For performance-based grants, the Company generally engages an independent appraisal company to determine the value of the shares at the date of grant, taking into account the underlying contingency risks associated with the performance criteria. The value of all grants are being expensed on a straight-line basis over their respective vesting periods (irrespective of achievement of the market performance-based grants) adjusted, as applicable, for forfeitures. For restricted share grants subject to graded vesting, the amounts expensed are at least equal to the measured expense of each vested tranche. Based on the terms of the 2017 Plan, those grants of restricted shares that are contributed to the Rabbi Trusts are classified as treasury stock on the Company’s consolidated balance sheet. Supplemental Consolidated Statements of Cash Flows Information Years ended December 31, 2020 2019 2018 Supplemental disclosure of cash activities: Cash paid for interest $ 23,208,000 $ 23,859,000 $ 22,191,000 Supplemental disclosure of non-cash activities: Capitalization of interest and financing costs 2,674,000 1,649,000 1,528,000 Buildings and improvements included in accounts payable and accrued liabilites 2,976,000 3,669,000 521,000 Recognition of right-of-use assets and related lease liabilities 703,000 13,778,000 — Issuance of OP Units in connection with a land parcel acquisition — — 975,000 Issued and Adopted Accounting Pronouncements In May 2014, the FASB issued guidance which amends the accounting for revenue recognition. Under the amended guidance, an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled to and receive in exchange for those goods or services. Leases are specifically excluded from this guidance and will be governed by the applicable lease codification. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In August 2016, the FASB issued guidance that clarifies how an entity should classify certain cash receipts and cash payments on its statement of cash flows. The guidance established that an entity will classify cash payments for debt prepayment or extinguishment costs as financing cash flows. In addition, the guidance provides entities with an alternative to consider regarding the nature of the source of distributions that an investor receives from an equity method investment when classifying distributions received in its cash flow statement (the nature of the distribution approach). Alternatively, entities can elect to classify the distributions received from equity method investees based on the cumulative earnings approach. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In November 2016, the FASB issued guidance that requires entities to show the changes in the total of cash, cash equivalents and restricted cash in the statement of cash flows. When cash, cash equivalents and restricted cash are presented in more than one line item on the balance sheet, the new guidance requires a reconciliation of the totals in the statement of cash flows to the related captions on the balance sheet. This reconciliation can be presented either on the face of the statement of cash flows or in the notes to the financial statements. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In May 2017, the FASB issued guidance which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as a modification. Under the new guidance, an entity will not apply modification accounting if the award’s fair value, vesting conditions, and the classification of the award as equity or a liability are the same immediately before and after the change. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In February 2016, the FASB issued guidance amending the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. The guidance, effective for annual and interim reporting periods beginning on or after December 15, 2018, requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The Company is not required to reassess the classification of existing ground leases where it is the lessee and therefore these leases will continue to be accounted for as operating leases. In the event the Company modifies existing ground leases or enters into new ground leases after adoption of the new standard, such leases may be classified as finance leases allocated payroll costs and other costs that are incurred regardless of whether the lease is obtained will no longer be capitalized as initial direct costs and instead will be expensed as incurred. During 2019, the Company expensed $ 2.8 million of leasing costs which would have previously been capitalized. The FASB provided lessors with a practical expedient, elected by class of underlying asset, to account for lease and non-lease components as a single lease component if certain criteria are met. Lessors that make these elections are required to provide additional disclosures. The FASB provided an additional (and optional) transition method that allows entities to initially apply the guidance at the adoption date (January 1, 2019) and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company applied both these practical expedients upon adoption. In November 2018, the FASB clarified the existing accounting treatment relating to receivables arising from operating leases, stating that such receivables are not within the scope of the expected credit loss standard and that impairment of receivables arising from operating leases should be accounted for in accordance with the recently-adopted lease accounting standard. This required the Company to review its existing lease portfolio to determine if all future lease payments are probable of collection and, if the Company determined that all future lease payments are not probable of collection, the Company will account for these leases on a cash basis. This required that all amounts that were historically recorded as bad debt expense, and previously included in operating expenses in the Company’s consolidated statement of operations, now be recorded as a direct reduction of rental revenues. As permitted by the standard upon adoption, the Company recorded a $0.5 million prior-period adjustment to opening equity which the Company has reflected in the consolidated statement of equity for 2019. In June 2016, the FASB issued guidance which enhances the methodology of measuring expected credit losses to include the use of forward-looking information to better calculate credit loss estimates. The guidance will apply to most financial assets measured at amortized cost and certain other instruments, including accounts receivable, loans, held-to-maturity debt securities, net investments in leases, and off-balance-sheet credit exposures. The guidance will require that the Company estimate the lifetime expected credit loss with respect to these receivables and record allowances that, when deducted from the balance of the receivables, represent the net amounts expected to be collected. The Company will also be required to disclose information about how it developed the allowances, including changes in the factors that influenced the Company’s estimate of expected credit losses and the reasons for those changes. The guidance was effective January 1, 2020, and the guidance did not have a material effect on the Company’s consolidated financial statements. In April 2020, the FASB issued a question-and-answer document (the “Lease Modification Q&A”) focused on the application of lease accounting guidance to lease concessions provided as a result of a novel strain of coronavirus (“COVID-19”). Under existing lease guidance, the Company would have to determine, on a lease by lease basis, if a lease concession was the result of a new arrangement reached with the tenant (treated with the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification Q&A clarifies that entities may elect to not evaluate whether lease-related relief that lessors provide to mitigate the economic effects of COVID-19 on lessees is a lease modification under ASC 842. Instead, an entity that elects not to evaluate whether a concession directly related to COVID-19 is a modification can then elect whether to apply the modification guidance (i.e. assume the relief was always contemplated by the contract or assume the relief was not contemplated by the contract). Both lessees and lessors may make this election. The Company evaluated its election on a disaggregated basis, with such election applied consistently to leases with similar characteristics and similar circumstances. During 2020, the Company provided lease concessions to certain tenants in response to the impact of COVID-19, in the form of rent deferrals. The Company has made an election to account for such lease concessions consistent with how those concessions would be accounted for under ASC 842 if enforceable rights and obligations for those concessions had already existed in the leases. This election is available for concessions related to the effects of the COVID-19 pandemic that do not result in a substantial increase in our rights as lessor, including concessions that result in the total payments required by the modified lease being substantially the same as or less than total payments required by the original lease. Substantially all of the Company’s concessions to date provide for a deferral of payments with no substantive changes to the consideration in the original lease. These deferrals affect the timing, but not the amount, of the lease payments. The Company is accounting for these deferrals as if no changes to the lease were made. Under this accounting, the Company increases its receivables as tenant payments accrue and continues to recognize rental income. During 2020, the Company has entered into lease modifications that deferred approximately $ million, of which $ million relates to deferrals that the Company continued to recognize rental income. In addition, during 2020, the Company has entered into agreements that waived approximately $ million of rent.

Real Estate

Real Estate	12 Months Ended
	Dec. 31, 2020
Real Estate [Abstract]
Real Estate	Note 3. Real Estate Real estate activity for 2020 and 2019 is composed of the following: Years ended December 31, 2020 2019 Cost Balance, beginning of year $ 1,515,206,000 $ 1,508,682,000 Properties transferred to held for sale (22,512,000 ) (36,265,000 ) Property acquisitions — 9,333,000 Outparcel dispositions (840,000 ) — Asset write-offs — (3,633,000 ) Improvements and betterments 35,624,000 37,089,000 Balance, end of the year $ 1,527,478,000 $ 1,515,206,000 Accumulated depreciation Balance, beginning of the year $ 389,861,000 $ 361,969,000 Properties transferred held for sale (3,947,000 ) (10,143,000 ) Outparcel dispositions (90,000 ) — Asset write-offs — (3,107,000 ) Depreciation expense 42,745,000 41,142,000 Balance, end of the year $ 428,569,000 $ 389,861,000 Net book value $ 1,098,909,000 $ 1,125,345,000 At December 31, 2020, Franklin Village Plaza was pledged as collateral for a mortgage loan payable. See Note 8 - “Mortgage Loans Payable and Credit Facilities”. 2019 Acquisition On June 19, 2019, the Company purchased Girard Plaza, a shopping center adjacent to its South Philadelphia property, located in Philadelphia, Pennsylvania. The purchase price for the property was $8.5 million, which has been allocated to real estate assets and liabilities. Dispositions During 2020, 2019 and 2018, the Company sold the properties listed below: Date Sales Gain on Property Location Sold Price Sale 2020 Metro Square Owings Mills, MD 7/9/2020 $ 4,288,000 $ - Oakland Mills outparcel building Columbia, MD 9/17/2020 1,050,000 643,000 Glen Allen Shopping Center Glen Allen, VA 10/8/2020 8,540,000 1,780,000 Pine Grove Plaza outparcel building Brown Mills, NJ 11/2/2020 1,100,000 565,000 Suffolk Plaza Suffolk, VA 12/10/2020 6,950,000 1,408,000 $ 21,928,000 $ 4,396,000 2019 Maxatawny Marketplace Maxatawny, PA 2/15/2019 $ 10,330,000 $ 101,000 Fort Washington Center Fort Washington, PA 6/26/2019 9,048,000 2,841,000 $ 19,378,000 $ 2,942,000 2018 Mechanicsburg Center Mechanicsburg, PA 8/28/2018 $ 16,100,000 $ 4,864,000 West Bridgewater Plaza West Bridgewater, MA 9/28/2018 3,500,000 - $ 19,600,000 $ 4,864,000 The Company recorded impairment charges of $7.2 million relating to Metro Square during 2020, and $9.4 million relating to West Bridgewater Plaza during 2018, which are included in continuing operations in the accompanying consolidated statements of operations. Real Estate Held for Sale As of December 31, 2020, Carll’s Corner, located in Bridgeton, New Jersey, and The Commons, located in Dubois Pennsylvania, have been classified as “real estate held for sale” on the accompanying consolidated balance sheet. During, 2020, the Company recorded impairment charges of $0.4 million in connection with The Commons. In addition, the Company recorded an impairment charge of $8.9 million in connection with The Commons in 2019 and $11.3 million in connection with Carll’s Corner in 2018. These impairment charges have been included in continuing operations in the accompanying consolidated statement of operations. Development Asset On July 23, 2020, the Company entered into a commercial lease agreement (the “Lease”) with the Government of the District of Columbia (the “District”), for the lease by the District of office space in a new six-story building to be constructed by the Company at Senator Square. The building is planned to house the new office headquarters for the District of Columbia’s Department of General Services’ (“DGS”) 700-member workforce. The term of the Lease is 20 years and 10 months, to commence upon substantial completion and delivery to DGS. The Company anticipates commencement of construction to occur in the first quarter of 2021 and currently estimates that the space will be delivered during the end of the fourth quarter 2022. Upon completion of the building, the District will be obligated to pay initial annual net rent of approximately $5.4 million per year, subject to a 2.5% annual escalator on each anniversary of rent commencement, plus certain operating costs, property taxes and amortization of tenant improvements together totaling approximately an additional $8.1 million per year, for an aggregate total annual rent of approximately $13.5 million. The Lease provides for a free rent period of 10 months immediately following rent commencement. The Lease also provides the District with a tenant credit of approximately $6.8 million to be applied, at the District’s election, against either annual rent or any other tenant payment obligations including tenant improvement costs, in excess of the tenant improvement allowance. Pursuant to the Lease, the landlord will contribute up to $155 per rentable square foot toward the cost of tenant improvements, to be amortized over 240 months. In addition, the Lease provides that the Company will contribute $9.38 per rentable square foot in additional tenant improvement allowance between the 10th and 12th Lease years, upon the District’s timely election. The obligations of the District under the Lease are subject to annual budget appropriation.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 4. Fair Value Measurements The carrying amounts of cash and cash equivalents, restricted cash, rents and other receivables, certain other assets, accounts payable and accrued liabilities, and variable-rate debt approximate their fair value due to their terms and/or short-term nature. The fair value of the Company’s investments and liabilities related to deferred compensation were determined to be Level 1 within the valuation hierarchy, and were based on independent values provided by financial institutions. The fair value of the Company’s fixed rate mortgage loan was estimated using available market information and discounted cash flow analyses based on borrowing rates the Company believes it could obtain with similar terms and maturities. As of December 31, 2020 and December 31, 2019, the fair value of the Company’s fixed rate mortgage loan payable, which was determined to be Level 3 within the valuation hierarchy, was $47.0 million and $47.0 million, respectively; the carrying value of such loan was $45.4 million and $46.4 million, respectively. As of December 31, 2020 and December 31, 2019, respectively, the aggregate fair values of the Company’s unsecured revolving credit facility and term loans approximated the carrying values. In addition, the fair values of the Company’s mortgage note receivable and finance lease obligation, which were determined to be Level 3 within the valuation hierarchy, approximated their carrying values as of December 31, 2020 and December 31, 2019, respectively. The valuation of the liabilities for the Company’s interest rate swaps, which are measured on a recurring basis, were determined to be Level 2 within the valuation hierarchy, and were based on independent values provided by financial institutions. Such valuations were determined using widely accepted valuation techniques, including discounted cash flow analyses, on the expected cash flows of each derivative. The analyses reflect the contractual terms of the swaps, including the period to maturity, and user-observable market-based inputs, including interest rate curves (“significant other observable inputs”). The fair value calculation also includes an amount for risk of non-performance using “significant unobservable inputs” such as estimates of current credit spreads to evaluate the likelihood of default. The Company has concluded that, as of December 31, 2020, the fair value associated with the “significant unobservable inputs” relating to the Company’s risk of non-performance was insignificant to the overall fair value of the interest rate swap agreements and, as a result, that the relevant inputs for purposes of calculating the fair value of the interest rate swap agreements, in their entirety, were based upon “significant other observable inputs”. Nonfinancial assets and liabilities measured at fair value in the consolidated financial statements consist of real estate held for sale, which, if applicable, are measured on a nonrecurring basis, and have been determined to be (1) Level 2 within the valuation hierarchy, where applicable, based on the respective contracts of sale, adjusted for closing costs and expenses, or (2) Level 3 within the valuation hierarchy, where applicable, based on estimated sales prices, adjusted for closing costs and expenses, determined by discounted cash flow analyses, income capitalization analyses or a sales comparison approach if no contracts had been concluded. The discounted cash flow and income capitalization analyses include all estimated cash inflows and outflows over a specific holding period and, where applicable, any estimated debt premiums. These cash flows were composed of unobservable inputs which included forecasted rental revenues and expenses based upon existing in-place leases, market conditions and expectations for growth. Capitalization rates and discount rates utilized in these analyses were based upon observable rates that the Company believed to be within a reasonable range of current market rates for the respective properties. The sales comparison approach is utilized for certain land values and includes comparable sales that were completed in the selected market areas. The comparable sales utilized in these analyses were based upon observable per acre rates that the Company believes to be within a reasonable range of current market rates for the respective properties. Valuations were prepared using internally-developed valuation models. These valuations are reviewed and approved, during each reporting period, by a diverse group of management, as deemed necessary, including personnel from the acquisition, accounting, finance, operations, development and leasing departments, and the valuations are updated as appropriate. In addition, the Company may engage third-party valuation experts to assist with the preparation of certain of its valuations. The following tables show the hierarchy for those assets measured at fair value on a recurring basis as of December 31, 2020 and December 31, 2019, respectively: December 31, 2020 Description Level 1 Level 2 Level 3 Total Investments related to deferred compensation liabilities (a) $ 948,000 $ — $ — $ 948,000 Deferred compensation liabilities (b) $ 952,000 $ — $ — $ 952,000 Interest rate swaps liability (b) $ — $ 18,927,000 $ — $ 18,927,000 December 31, 2019 Description Level 1 Level 2 Level 3 Total Investments related to deferred compensation liabilities (a) $ 823,000 $ — $ — $ 823,000 Deferred compensation liabilities (b) $ 824,000 $ — $ — $ 824,000 Interest rate swaps asset (a) $ — $ 136,000 $ — $ 136,000 Interest rate swaps liability (b) $ — $ 7,180,000 $ — $ 7,180,000 (a) Included in other assets and deferred charges, net, in the accompanying consolidated balance sheets. (b) Included in accounts payable and accrued liabilities in the accompanying consolidated balance sheets. As of December 31, 2020, real estate held for sale on the consolidated balance sheet consisted of (1) one retail property, totaling $2.1 million, which was determined to be Level 3 asset under the hierarchy, and was measured at fair value less cost to sell on a non- recurring basis using a direct capitalization approach, consisting of a capitalization rate of 8.5%, and (2) one retail property, totaling $7.4 million, which was determined to be Level 3 asset under the hierarchy, and was measured at fair value less cost to sell on a non-recurring basis using a discounted cash flow approach, consisting of a capitalization rate of 11.5% and a discount rate of 8.0%.

Concentration of Credit Risk

Concentration of Credit Risk	12 Months Ended
	Dec. 31, 2020
Risks And Uncertainties [Abstract]
Concentration of Credit Risk	Note 5. Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents in excess of insured amounts and tenant receivables. The Company places its cash and cash equivalents with high quality financial institutions. Management performs ongoing credit evaluations of its tenants and requires certain tenants to provide security deposits and/or suitable guarantees. Excluding properties held for sale and sold, Giant Food Stores, LLC, Stop & Shop, Inc. and Food Lion, LLC, each of which is owned by Ahold N.V., a Netherlands corporation, accounted for an aggregate of approximately 13%, 12% and 11% of the Company’s total revenues during 2020, 2019 and 2018, respectively. The Company’s properties are located largely in the region straddling the Washington, D.C. to Boston corridor, which exposes it to greater economic risks than if the properties it owned were located in a greater number of geographic regions (in particular, 23 of the Company’s properties are located in Pennsylvania).

Receivables

Receivables	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Receivables	Note 6. Receivables Receivables at December 31, 2020 and 2019 are composed of the following: December 31, 2020 2019 Rents and other receivables, net (a) $ 6,541,000 $ 5,061,000 Mortgage note receivable 3,500,000 3,500,000 Straight-line rents, net 11,911,000 13,603,000 $ 21,952,000 $ 22,164,000 (a) Includes $1.9 million of net receivables related to deferred rent as a result of COVID-19 as of December 31, 2020

Other Assets and Deferred Charg

Other Assets and Deferred Charges, Net	12 Months Ended
	Dec. 31, 2020
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Other Assets and Deferred Charges, Net	Note 7. Other Assets and Deferred Charges, Net Other assets and deferred charges, net, at December 31, 2020 and 2019 are composed of the following: December 31, 2020 2019 Lease origination costs (a) $ 22,331,000 $ 19,947,000 Right-of-use assets (b) 13,828,000 13,638,000 Prepaid expenses 6,906,000 6,048,000 Investments related to share-based compensation 948,000 823,000 Unsecured revolving credit facility financing costs 623,000 1,021,000 Leasehold improvements, furniture and fixtures 85,000 200,000 Interest rate swaps — 136,000 Other 534,000 326,000 Total other assets and deferred charges, net $ 45,255,000 $ 42,139,000 (a) Lease origination costs include the unamortized balance of intangible lease assets resulting from purchase accounting allocations of $5.5 million (cost of $19.4 million and accumulated amortization of $13.9 million) and $6.6 million (cost of $19.9 million and accumulated amortization of $13.3 million) as of December 31, 2020 and 2019, respectively. (b) In connection with of the new lease accounting standard (see Note 2 – “Issued and Adopted Accounting Pronouncements”), the Company recorded right-of-use assets and liabilities based on its future obligation under its ground lease and executive office lease agreements for which the Company is the lessee. Deferred charges are amortized over the terms of the related agreements. Amortization expense related to deferred charges (including amortization of deferred financing costs included in non-operating income and expense) amounted to $6.2 million, $5.3 million and $5.2 million for 2020, 2019, and 2018, respectively. The unamortized balances of deferred lease origination costs is net of accumulated amortization of $37.1 million at December 31, 2020. In addition, deferred financing costs relating to the unsecured revolving credit facility is net of accumulated amortization of $2.1 million at December 31, 2020. Deferred lease origination costs and deferred financing costs relating to the unsecured revolving credit facility will be charged to future operations as follows: Lease Unsecured revolving origination credit facility costs financing costs 2021 $ 2,436,000 $ 623,000 2022 2,094,000 — 2023 1,805,000 — 2024 1,467,000 — 2025 1,196,000 — Thereafter 13,333,000 — $ 22,331,000 $ 623,000

Mortgage Loans Payable and Unse

Mortgage Loans Payable and Unsecured Credit Facilities	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Mortgage Loans Payable and Unsecured Credit Facilities	Note 8. Mortgage Loans Payable and Unsecured Credit Facilities Debt and finance lease obligations are composed of the following at December 31, 2020 and 2019: December 31, 2020 December 31, 2019 Contractual Contractual Maturity Balance interest rates Balance interest rates Description dates outstanding weighted-average outstanding weighted-average Fixed-rate mortgage Jun 2026 $ 45,645,000 3.9% $ 46,679,000 3.9% Finance lease obligation Sep 2050 5,631,000 5.3% 5,665,000 5.3% Unsecured credit facilities: Variable-rate: Revolving credit facility Sep 2021 (a) 175,000,000 2.7%(b) 106,000,000 3.2% Term loan Sep 2022 50,000,000 1.9% 50,000,000 3.3% Fixed-rate (c): Term loan Feb 2022 50,000,000 3.3% 50,000,000 3.0% Term loan Sep 2022 50,000,000 3.5% 50,000,000 2.8% Term loan Apr 2023 100,000,000 3.5% 100,000,000 3.2% Term loan Sep 2024 75,000,000 3.9% 75,000,000 3.7% Term loan Jul 2025 75,000,000 4.8% 75,000,000 4.6% Term loan n/a - - 75,000,000 3.6% 626,276,000 3.4% 633,344,000 3.5% Unamortized issuance costs (2,002,000 ) (2,769,000 ) $ 624,274,000 $ 630,575,000 (a) The revolving credit facility is subject to a one-year (b) The interest rate on the revolving credit facility consists of LIBOR plus a credit spread based on the Company’s leverage ratio. The Company has an interest rate swap agreement expiring in February 2021 (c) The interest rates on these term loans consist of LIBOR plus a credit spread based on the Company’s leverage ratio, for which the Company has interest rate swap agreements which convert the LIBOR rates to fixed rates. Accordingly, these term loans are presented as fixed-rate debt. Unsecured Revolving Credit Facility and Term Loans The Company has a $300 million unsecured credit facility that consists of (1) a $250 million revolving credit facility, expiring on September 8, 2021, and (2) a $50 million term loan, expiring on September 8, 2022. The revolving credit facility may be extended, at the Company’s option, for an additional one-year On August 4, 2020, the Company amended its existing $300 million unsecured credit facility and term loans. After such amendments, the Company’s financial ratios and borrowing base are now all computed using the trailing four quarters as opposed to the current quarter annualized and interest rate swaps that are a hedge of existing debt are now excluded from the definition of debt. The details of the remaining unsecured term loans are as follows: Amount Maturity date Interest range $ 50,000,000 February 2022 LIBOR + 130 bps to 190 bps $ 50,000,000 September 2022 LIBOR + 130 bps to 190 bps $ 100,000,000 April 2023 LIBOR + 165 bps to 225 bps $ 75,000,000 September 2024 LIBOR + 170 bps to 225 bps $ 75,000,000 July 2025 LIBOR + 170 bps to 225 bps The Company’s unsecured credit facility and term loans contain financial covenants including, but not limited to, maximum debt leverage, maximum secured debt, minimum fixed charge coverage, and minimum net worth. In addition, the facility contains restrictions including, but not limited to, limits on indebtedness, certain investments and distributions. The Company’s failure to comply with the covenants or the occurrence of an event of default under the facilities could result in the acceleration of the related debt and exercise of other lender remedies. Although the credit facility is unsecured, borrowing availability is based on unencumbered property adjusted net operating income for the trailing twelve months, as defined in the agreements. As of the date of filing this Form 10-K, the Company had $175.0 million outstanding and $56.7 available for additional borrowings under its revolving credit facility, and was in compliance with all financial covenants. Additionally, the COVID-19 pandemic may negatively impact the Company’s future ability to remain compliant with all financial covenants, including the ability to generate sufficient unencumbered property adjusted net operating income to support current borrowings. The Company’s unencumbered property adjusted net operating income was not significantly impacted by the COVID-19 pandemic until the quarter ended June 30, 2020. Accordingly, not until the quarter ended March 31, 2021, will the unencumbered property adjusted net operating income for the trailing twelve months fully reflect the negative impact of the COVID-19 pandemic Scheduled Scheduled principal payments on a mortgage loan payable, finance lease obligation, unsecured term loans, and the unsecured credit facility at December 31, 2020, due on various dates from 2021 to 2050, are as follows: Mortgage Loan Finance Lease Revolving Term Unamortized Year Payable Obligation Credit Facility Loans Total Issuance Costs Total 2021 $ 1,074,000 $ 35,000 175,000,000 (a) $ - $ 176,109,000 $ (647,000 ) $ 175,462,000 2022 1,116,000 37,000 - 150,000,000 151,153,000 (499,000 ) 150,654,000 2023 1,160,000 39,000 - 100,000,000 101,199,000 (274,000 ) 100,925,000 2024 1,206,000 41,000 - 75,000,000 76,247,000 (207,000 ) 76,040,000 2025 1,253,000 44,000 - 75,000,000 76,297,000 (115,000 ) 76,182,000 Thereafter 39,836,000 5,435,000 - - 45,271,000 (260,000 ) 45,011,000 $ 45,645,000 $ 5,631,000 $ 175,000,000 $ 400,000,000 $ 626,276,000 $ (2,002,000 ) $ 624,274,000 (a) The revolving credit facility is subject to a one-year Derivative Financial Instruments At December 31, 2020, the Company had $18.9 million included in accounts payable and accrued liabilities on the consolidated balance sheet relating to the fair value of the interest rate swaps applicable to the unsecured term loans discussed above. Charges and/or credits relating to the changes in the fair value of the interest rate swaps are made to accumulated other comprehensive income (loss), noncontrolling interests (minority interests in consolidated joint ventures and limited partners’ interest), or operations (included in interest expense), as applicable. Over time, the unrealized gains and losses recorded in accumulated other comprehensive loss will be reclassified into earnings as an increase or reduction to interest expense in the same periods in which the hedged interest payments affect earnings. The Company estimates that approximately $6.9 million of accumulated other comprehensive loss will be reclassified as a charge to earnings within the next twelve months. The following is a summary of the derivative financial instruments held by the Company at December 31, 2020 and December 31, 2019: December 31, 2020 Designation/ Fair Maturity Balance sheet Cash flow Derivative Count value dates location Qualifying Interest rate swaps 7 $ 18,927,000 2021-2025 Accounts payable and accrued liabilities December 31, 2019 Designation/ Fair Maturity Balance sheet Cash flow Derivative Count value dates location Qualifying Interest rate swaps 2 $ 136,000 2020-2023 Other assets and deferred charges, net Qualifying Interest rate swaps 6 $ 7,180,000 2021-2025 Accounts payable and accrued liabilities The notional values of the interest rate swaps held by the Company at December 31, 2020 and December 30, 2019 were $425.0 million and $425.0 million, respectively. The following presents the effect of the Company’s derivative financial instruments on the consolidated statements of operations and the consolidated statements of equity 2020, 2019 and 2018, respectively: (Loss) gain recognized in other comprehensive (loss) income (effective portion) Designation/ Years ended December 31, Cash flow Derivative 2020 2019 2018 Qualifying Interest rate swaps $ (17,940,000 ) $ (13,090,000 ) $ 2,185,000 Gain (loss) recognized in other comprehensive (loss) income reclassified into earnings (effective portion) Years ended December 31, Classification 2020 2019 2018 Continuing Operations $ (6,062,000 ) $ 1,196,000 $ 667,000 As of December 31, 2020, the Company believes it has no significant risk associated with non-performance of the financial institutions which are the counterparties to its derivative contracts.

Intangible Lease Asset_Liabilit

Intangible Lease Asset/Liability	12 Months Ended
	Dec. 31, 2020
Intangible Lease Asset Liability [Abstract]
Intangible Lease Asset/Liability	Note 9. Intangible Lease Asset/Liability Unamortized intangible lease liabilities that relate to below-market leases amounted to $8.9 million and $10.5 million at December 31, 2020 and December 31, 2019, respectively. Unamortized intangible lease assets that relate to above-market leases amounted to $0.2 million and $0.4 million at December 31, 2020 and December 31, 2019, respectively. The unamortized balance of intangible lease liabilities at December 31, 2020 is net of accumulated amortization of $32.3 million, and will be credited to future operations as follows: 2021 $ 931,000 2022 865,000 2023 794,000 2024 630,000 2025 619,000 Thereafter 5,100,000 $ 8,939,000

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 10. Commitments and Contingencies The Company is a party to certain legal actions arising in the normal course of business. Management does not expect there to be adverse consequences from these actions that would be material to the Company’s consolidated financial statements. Under various federal, state, and local laws, ordinances, and regulations, an owner or operator of real estate may be required to investigate and clean up hazardous or toxic substances, or petroleum product releases, at its properties. The owner may be liable to governmental entities or to third parties for property damage, and for investigation and cleanup costs incurred by such parties in connection with any contamination. Generally, the Company’s tenants must comply with environmental laws and meet any remediation requirements. In addition, leases typically impose obligations on tenants to indemnify the Company from any compliance costs the Company may incur as a result of environmental conditions on the property caused by the tenant. However, if a lease does not require compliance, or if a tenant fails to or cannot comply, the Company could be forced to pay these costs. Management is unaware of any environmental matters that would have a material impact on the Company’s consolidated financial statements. The Company’s executive offices are located at 44 South Bayles Avenue, Port Washington, New York. The terms of the lease, which will expire in February 2021, provide for future minimum rents of $0.1 million in 2021. The Company is the lessee under several ground lease and its executive office lease agreements. In accordance with the adoption of the new lease accounting standard (see Note 2 – “Issued and Adopted Accounting Pronouncements”), the Company recorded right-of-use assets and related lease liabilities for these leases as of January 1, 2019. As of December 31, 2020, the Company’s weighted average remaining lease term is approximately 30.7 years and the weighted average discount rate used to calculate the Company’s lease liability is approximately 5.7%. Rent expense under the Company’s ground lease and executive office lease agreements was approximately $1.8 million, $1.7 million and $1.1 million for 2020, 2019 and 2018, respectively. The following table represents a reconciliation of the Company’s undiscounted future minimum lease payments for its ground lease and executive office lease agreements applicable to right-of-use liabilities as of December 31, 2020: 2021 $ 1,113,000 2022 1,112,000 2023 1,112,000 2024 1,114,000 2025 993,000 Thereafter 28,554,000 Total undiscounted future minimum lease payments 33,998,000 Future minimum lease payments, discount (19,921,000 ) Right-of-use liabilities $ 14,077,000

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2020
Stockholders Equity Note [Abstract]
Shareholders' Equity	Note 11. Shareholders’ Equity Preferred Stock The Company’s 7.25% Series B Cumulative Redeemable Preferred Stock The Company’s 6.50% Series C Cumulative Redeemable Preferred Stock The Company is authorized to issue up to 12,500,000 shares of preferred stock. The following tables summarize details about the Company’s preferred stock: Series B Series C Preferred Stock Preferred Stock Par value $ 0.01 $ 0.01 Liquidation value $ 25.00 $ 25.00 December 31, 2020 December 31, 2019 Series B Series C Series B Series C Preferred Stock Preferred Stock Preferred Stock Preferred Stock Shares authorized 1,450,000 6,450,000 1,450,000 6,450,000 Shares issued and outstanding 1,450,000 5,000,000 1,450,000 5,000,000 Balance $ 34,767,000 $ 124,774,000 $ 34,767,000 124,774,000 On January 12, 2018, the Company redeemed 2,000,000 shares of Series B Preferred Stock at a price of $25.00 per share for an aggregate of $50.0 million, plus all accrued and unpaid dividends up to (but excluding) the redemption date. Common Stock On November 25, 2020, the Company effected a 1-for-6.6 On December 18, 2018, the Company’s Board of Directors approved a stock repurchase program, which authorized the Company to purchase up to $30.0 million of the Company’s common stock in the open market or through private transactions, subject to market conditions. The stock repurchase program expired on December 18, 2019. During 2018, the Company repurchased approximately 117,000 shares at a weighted average price per share of $19.91. During 2019, the Company repurchased an additional 311,000 shares at a weighted average price per share of $22.03. Since approval of the plan on December 18, 2018, the Company has repurchased 428,000 shares at a weighted average price per share of $21.45. The Company has a Dividend Reinvestment and Direct Stock Purchase Plan (“DRIP”) which offers a convenient method for shareholders to invest cash dividends and/or make optional cash payments to purchase shares of the Company’s common stock. Such purchases are at 100% of market value. There were no significant transactions under the DRIP during 2020, 2019 and 2018. At December 31, 2020, there remained 427,000 shares authorized under the DRIP. Dividends The following table provides a summary of dividends declared and paid per share: Years ended December 31, 2020 2019 2018 Common stock $ 0.528 $ 1.320 $ 1.320 7.25% Series B Preferred Stock $ 1.812 $ 1.812 $ 1.812 6.50% Series C Preferred Stock $ 1.625 $ 1.625 $ 1.625 At December 31, 2020 and 2019, there were $1.2 million and $1.2 million, respectively, of accrued preferred stock dividends. On January 15, 2021, the Company’s Board of Directors declared a dividend of $0.066 per share with respect to its common stock. At the same time, the Board declared a dividend of $0.453125 and $0.406250 per share with respect to the Company’s Series B Preferred Stock and Series C Preferred Stock, respectively. The distributions are payable on February 22, 2021 to shareholders of record on February 10, 2021.

Revenues

Revenues	12 Months Ended
	Dec. 31, 2020
Revenues [Abstract]
Revenues	Note 12. Revenues Rents for 2020, 2019 and 2018, respectively, are comprised of the following: Years ended December 31, 2020 2019 2018 Base rents $ 95,987,000 $ 105,041,000 $ 107,630,000 Expense recoveries 29,241,000 33,475,000 33,378,000 Percentage rent 1,778,000 971,000 725,000 Straight-line rents (1,208,000 ) 405,000 1,142,000 Amortization of intangible lease liabilities, net 1,373,000 2,827,000 4,361,000 Total rents $ 127,171,000 $ 142,719,000 $ 147,236,000 The Company recognizes lease termination income when the following conditions are met: (1) the lease termination agreement has been executed, (2) the lease termination fee is determinable, (3) all the Company’s landlord services pursuant to the terminated lease have been rendered, and (4) collectability of the lease termination fee is assured. On January 31, 2020, the Company agreed to a cash payment in consideration for permitting a dark anchor tenant to terminate its lease prior to the contractual expiration at Metro Square. As a result of this termination, revenues for 2020, included approximately $7.1 million of other income. In April 2018, the Company accepted a cash payment of $4.3 million in consideration for permitting a dark anchor tenant to terminate its lease prior to the contractual expiration. As a result of this termination, revenues for 2018 includes $5.4 million, consisting of (1) $3.8 million of other income (the $4.3 million cash payment reduced by $0.5 million straight-line rent receivable) and (2) $1.5 million accelerated intangible lease liability amortization. Annual future base rents due to be received under non-cancelable operating leases in effect at December 31, 2020 are approximately as follows (excluding those base rents applicable to properties classified as real estate held for sale): 2021 $ 93,213,000 2022 85,973,000 2023 85,650,000 2024 75,194,000 2025 62,652,000 Thereafter 334,634,000 $ 737,316,000 Total future minimum rents do not include expense recoveries for real estate taxes and operating costs, or percentage rents based upon tenants’ sales volume. Such additional revenue amounts aggregated approximately $31.1 million, $34.4 million and $34.1 million for 2020, 2019 and 2018, respectively. Such amounts do not include amortization of intangible lease liabilities.

401(k) Retirement Plan

401(k) Retirement Plan	12 Months Ended
	Dec. 31, 2020
Compensation And Retirement Disclosure [Abstract]
401(k) Retirement Plan	Note 13. 401(k) Retirement Plan The Company has a 401(k) retirement plan (the “Plan”), which permits all eligible employees to defer a portion of their compensation under the Code. Pursuant to the provisions of the Plan, the Company may make discretionary contributions on behalf of eligible employees. The Company made contributions to the Plan of $375,000, $387,000, and $371,000 for 2020, 2019, and 2018, respectively.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2020
Share Based Compensation [Abstract]
Share-Based Compensation	Note 14. Share-Based Compensation The following tables set forth certain share-based compensation information for 2020, 2019, and 2018, respectively: Years ended December 31, 2020 2019 2018 Expense relating to share/unit grants $ 3,954,000 $ 4,496,000 $ 4,217,000 Amounts capitalized (231,000 ) (379,000 ) (454,000 ) Total charged to operations $ 3,723,000 $ 4,117,000 $ 3,763,000 Weighted average Shares grant date value Unvested shares/units, December 31, 2019 645,000 $ 27.92 Restricted share grants 63,000 $ 17.48 Vested during period (59,000 ) $ 37.73 Forfeitures/cancellations (7,000 ) $ 40.38 Unvested shares/units, December 31, 2020 642,000 $ 25.86 At December 31, 2020, approximately 0.3 million shares remained available for grants pursuant to the 2017 Plan and, at that date, there remained an aggregate of $5.8 million applicable to all grants and awards to be expensed over a weighted average period of 2.1 years. During 2020, there were 63,000 time-based restricted shares issued with a weighted average grant date fair value of $17.48 per share. During 2019, there were 79,000 time-based restricted shares issued, with a weighted average grant date fair value of $21.25 per share. Excluding the grants relating to the Company’s President and CEO (see below), during 2018, there were 92,000 time-based restricted shares issued, with a weighted average grant date fair value of $32.54 per share. The total fair values of shares vested during 2020, 2019, and 2018 were $938,000, $485,000, and $7,556,000, respectively. President and CEO Employment Contract Upon employment on June 15, 2011, the Company’s President and CEO received restricted share grants totaling 378,800 shares, one-half of which was time-based, vesting upon the seventh anniversary of the date of grant (June 15, 2018), and the other half market performance-based, to be earned if the total annual return on an investment in the Company’s common stock (“TSR”) was at least an average of 6.5% per year for the seven years ended June 15, 2018. On June 15, 2018, approximately 189,400 time-based shares vested and approximately 189,400 market performance-based shares were forfeited as the market performance criteria was not achieved. On June 15, 2018, in connection with a new amended and restated employment agreement, the Company’s President and CEO received an approximate 152,000 time-based restricted share grant at a market price of $28.91. However, as a result of an existing limitation within the 2017 Plan, only approximately 114,000 shares were granted on June 15, 2018, with the remaining 38,000 shares granted on January 1, 2019. All 152,000 time-based restricted shares will vest upon the fifth anniversary of the effective date of the employment agreement (June 15, 2023), subject to the Company’s President and CEO continuous employment with the Company through such date, subject to certain exceptions. Consistent with such time-based restricted grant awards to other participants, dividends will be paid on these shares. In addition, on June 15, 2018, the Company’s President and CEO was also granted a market performance-based equity award of approximately 227,000 restricted stock units (“RSUs”) and approximately 227,000 dividend equivalent rights of the Company. Each RSU represents a contingent right to receive one common share if certain market performance criteria are achieved. During the three years ending June 15, 2021 (the “Interim Performance Period”), a maximum of approximately 114,000 shares can be earned. Any portion of the market performance based equity award that is not earned as of the end of the Interim Performance Period will be carried forward for calculation for the five years ending June 15, 2023 (the “Full Performance Period”). The percentage of the market performance-based equity award to be earned will be determined based on the Company’s average annual TSR over the Interim Performance Period and/or over the Full Performance Period as follows: if average annual TSR (1) is below 4%, the percentage of grant earned would be 0%, (2) equals 4%, the percentage of grant earned would be 33.3%, (3) equals 6.5%, the percentage of grant earned would be 66.7%, and (4) equals 10% or above, the percentage of grant earned would be 100%. Linear interpolation shall be applied to determine the percentage of the market performance-based equity award that is earned where the average annual TSR over the performance period falls between the percentages set forth above. An independent appraisal determined the value of the market performance-based equity award for the interim and full performance periods to be $21.78 and $19.60 per share, respectively, compared to a market price at the date of grant of $28.91 per share. The dividend equivalent rights will accrue and will be deemed to be reinvested into the Company’s common stock and payment with respect to the dividend equivalent rights will be deferred until the end of the Interim Performance Period, or the Full Performance Period, as the case may be, to coincide with the vesting, if any, of the market performance-based equity award. Payment will only be made for the portion of the market performance-based equity award that is earned and vests.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Note 15. Earnings Per Share Basic earnings per share (“EPS”) is calculated by dividing net income (loss) attributable to the Company’s common shareholders by the weighted average number of common shares outstanding for the period including participating securities (restricted shares that have non-forfeitable rights to receive dividends issued pursuant to the Company’s share-based compensation program are considered participating securities). Unvested restricted shares that are participating securities are not allocated net losses and/or any excess of dividends declared over net income, as such amounts are allocated entirely to the common shareholders. For 2020, 2019 and 2018, the Company had 0.4 million, 0.4 million and 0.5 million, respectively, of weighted average unvested restricted shares outstanding. The following table provides a reconciliation of the numerator and denominator of the EPS calculations for the 2020, 2019 and 2018, respectively: Years ended December 31, 2020 2019 2018 Numerator Net (loss) income $ (520,000 ) $ 1,566,000 $ 4,358,000 Preferred stock dividends (10,752,000 ) (10,752,000 ) (10,863,000 ) Preferred stock redemption costs - - (3,507,000 ) Net (income) attributable to noncontrolling interests (552,000 ) (490,000 ) (469,000 ) Net earnings allocated to unvested shares (238,000 ) (558,000 ) (628,000 ) Net (loss) attributable to vested common shares $ (12,062,000 ) $ (10,234,000 ) $ (11,109,000 ) Denominator Weighted average number of vested common shares outstanding, basic and diluted 13,104,000 13,082,000 13,397,000 Net (loss) per common share attributable to common shareholders, basic and diluted $ (0.92 ) $ (0.78 ) $ (0.83 ) Fully-diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into shares of common stock. For 2020, 2019 and 2018, no restricted stock units would have been issuable under the Company’s President and CEO market performance-based equity award (see Note 14 – “Share-Based Compensation”) had the measurement periods ended on December 31, 2020, 2019 and 2018, respectively. Therefore, this market performance-based equity award had no impact in calculating diluted EPS for 2020, 2019 and 2018. Net loss attributable to noncontrolling interests of the Operating Partnership has been excluded from the numerator and the related OP Units have been excluded from the denominator for the purpose of calculating diluted EPS as there would have been no effect had such amounts been included. The weighted average number of OP Units outstanding was 81,000, 83,000 and 65,000 for 2020, 2019 and 2018, respectively.

Selected Quarterly Financial Da

Selected Quarterly Financial Data	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data	Note 16. Selected Quarterly Financial Data (unaudited) Quarter ended March 31 June 30 September 30 December 31 2020 Revenues $ 42,485,000 $ 28,620,000 $ 31,175,000 $ 33,258,000 Net (loss) income $ (2,098,000 ) $ (6,009,000 ) $ 1,404,000 $ 6,183,000 Net (loss) income attributable to common shareholders $ (4,934,000 ) $ (8,785,000 ) $ (1,421,000 ) $ 3,316,000 Per common share (basic and diluted) (a) $ (0.39 ) $ (0.67 ) $ (0.11 ) $ 0.25 2019 Revenues $ 36,883,000 $ 35,660,000 $ 35,912,000 $ 35,628,000 Net income (loss) $ 2,989,000 $ 5,544,000 $ 2,947,000 $ (9,914,000 ) Net income (loss) attributable to common shareholders $ 194,000 $ 2,695,000 $ 92,000 $ (12,657,000 ) Per common share (basic and diluted) (a) $ 0.00 $ 0.20 $ (0.00 ) $ (0.98 ) (a) Differences between the sum of the four quarterly per share amounts and the annual per share amounts, if any, are attributable to the effect of the weighted average outstanding share calculation for the respective periods.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Note 17. Subsequent Events In determining subsequent events, management reviewed all activity from January 1, 2021 through the date of filing this Annual Report on Form 10-K.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2020
Real Estate And Accumulated Depreciation Disclosure [Abstract]
Schedule III - Real Estate and Accumulated Depreciation	Cedar Realty Trust, Inc. Schedule III Real Estate and Accumulated Depreciation Year built/ Gross Initial cost to the Company Year Percent Year last leasable Building and Property State acquired owned renovated area Land Improvements Academy Plaza PA 2001 100% 1965/2013 137,415 $ 2,406,000 $ 9,623,000 Big Y Shopping Center CT 2013 100% 2007 101,105 11,272,000 23,395,000 Camp Hill PA 2002 100% 1958/2005 430,198 4,460,000 17,857,000 Carmans Plaza NY 2007 100% 1954/2007 195,485 8,539,000 35,804,000 Christina Crossing DE 2017 100% 2008 119,446 4,341,000 23,227,000 Coliseum Marketplace VA 2005 100% 1987/2012 106,648 2,924,000 14,416,000 Colonial Commons PA 2011 100% 2011/2013 410,432 9,367,000 37,496,000 Crossroads II PA 2008 60% 2009 133,717 15,383,000 - East River Park DC 2015 100% 1946-1996 150,038 9,143,000 30,893,000 Elmhurst Square VA 2006 100% 1961-1983 66,254 1,371,000 5,994,000 Fairview Commons PA 2007 100% 1976/2003 52,964 858,000 3,568,000 Fieldstone Marketplace MA 2005/2012 100% 1988/2003 150,123 5,229,000 21,440,000 Fishtown Crossing PA 2001 100% 1988 127,265 2,942,000 11,769,000 Franklin Village Plaza (a) MA 2004/2012 100% 1987/2005 305,937 14,270,000 61,915,000 General Booth Plaza VA 2005 100% 1985 71,639 1,935,000 9,493,000 Girard Plaza PA 2019 100% 1950’s/2010 35,688 4,685,000 4,648,000 Gold Star Plaza PA 2006 100% 1988 71,720 1,644,000 6,519,000 Golden Triangle PA 2003 100% 1960/2005 202,790 2,320,000 9,713,000 Groton Shopping Center CT 2007 100% 1969 130,264 3,070,000 12,320,000 Halifax Plaza PA 2003 100% 1994 51,510 1,412,000 5,799,000 Hamburg Square PA 2004 100% 1993/2010 102,058 1,153,000 4,678,000 Jordan Lane CT 2005 100% 1969/1991 177,504 4,291,000 21,176,000 Kempsville Crossing VA 2005 100% 1985/2013 79,512 2,207,000 11,000,000 Kings Plaza MA 2007 100% 1970/1994 168,243 2,413,000 12,604,000 Lawndale Plaza PA 2015 100% 1998 92,773 3,635,000 21,854,000 Meadows Marketplace PA 2004/2012 100% 2005 91,518 1,914,000 - Newport Plaza PA 2003 100% 1996 64,489 1,721,000 7,758,000 New London Mall CT 2009 100% 1967/1997 259,566 14,891,000 24,967,000 Northside Commons PA 2008 100% 2009 69,136 3,332,000 - Norwood Shopping Center MA 2006 100% 1965/2013 87,406 1,874,000 8,453,000 Oak Ridge Shopping Center VA 2006 100% 2000 38,700 960,000 4,254,000 Oakland Commons CT 2007 100% 1962/2013 90,100 2,504,000 15,662,000 Oakland Mills MD 2005 100% 1960's/2004 57,008 1,611,000 6,292,000 Palmyra Shopping Center PA 2005 100% 1960/2012 111,051 1,488,000 6,566,000 Pine Grove Plaza NJ 2003 100% 2001/2002 79,306 2,010,000 6,489,000 Quartermaster Plaza PA 2014 100% 2004 456,602 37,031,000 54,210,000 River View Plaza PA 2003 100% 1991/1998 113,922 9,718,000 40,356,000 San Souci Plaza MD 2009 40% 1985 - 1997 264,134 14,849,000 18,445,000 Senator Square DC 2018 100% 1946 - 2005 42,941 - 5,327,000 Shoppes at Arts District DC 2016 100% 2011 35,676 2,247,000 18,616,000 South Philadelphia PA 2003 100% 1950/2003 193,085 8,222,000 36,314,000 Southington Center CT 2003 100% 1972/2000 155,842 - 11,834,000 Swede Square PA 2003 100% 1980/2012 100,809 2,268,000 6,232,000 The Brickyard CT 2004 100% 1990/2012 227,598 7,632,000 29,308,000 The Point PA 2000 100% 1972/2012 262,072 2,700,000 10,800,000 The Shops at Bloomfield Station NJ 2016 100% 2015 63,844 625,000 17,674,000 The Shops at Suffolk Downs MA 2005 100% 2005/2011 121,187 7,580,000 11,089,000 Timpany Plaza MA 2007 100% 1970's-1989 182,799 3,412,000 19,240,000 Trexler Mall PA 2005 100% 1973/2013 336,687 6,932,000 32,815,000 Trexlertown Plaza PA 2006 100% 1990/2011 325,171 13,349,000 23,867,000 Valley Plaza MD 2003 100% 1975/1994 190,939 1,950,000 7,766,000 Washington Center Shoppes NJ 2001 100% 1979/1995 157,300 2,061,000 7,314,000 Webster Plaza MA 2007 100% 1960's-2004 98,984 3,551,000 18,412,000 Yorktowne Plaza MD 2007 100% 1970/2000 136,197 5,940,000 25,505,000 Other n/a n/a 100% n/a - 1,965,000 - Total Portfolio 8,084,797 $ 285,607,000 $ 892,766,000 Cedar Realty Trust, Inc. Schedule III Real Estate and Accumulated Depreciation Gross amount at which carried at (continued) Subsequent December 31, 2020 cost Building and Accumulated Property capitalized (b) Land improvements Total depreciation Academy Plaza $ 6,107,000 $ 2,406,000 $ 15,730,000 $ 18,136,000 $ 6,651,000 Big Y Shopping Center 361,000 10,268,000 24,760,000 35,028,000 5,560,000 Camp Hill 40,626,000 4,093,000 58,850,000 62,943,000 24,270,000 Carmans Plaza 18,641,000 8,421,000 54,563,000 62,984,000 17,896,000 Christina Crossing 1,603,000 4,341,000 24,830,000 29,171,000 3,595,000 Coliseum Marketplace 5,629,000 3,586,000 19,383,000 22,969,000 8,465,000 Colonial Commons 7,846,000 9,367,000 45,342,000 54,709,000 16,580,000 Crossroads II 29,734,000 17,671,000 27,446,000 45,117,000 8,147,000 East River Park 7,514,000 9,398,000 38,152,000 47,550,000 6,558,000 Elmhurst Square 1,251,000 1,371,000 7,245,000 8,616,000 2,668,000 Fairview Commons 452,000 858,000 4,020,000 4,878,000 1,470,000 Fieldstone Marketplace 3,386,000 5,167,000 24,888,000 30,055,000 10,740,000 Fishtown Crossing 9,676,000 2,843,000 21,544,000 24,387,000 5,417,000 Franklin Village Plaza (a) 6,494,000 14,681,000 67,998,000 82,679,000 19,215,000 General Booth Plaza (132,000 ) 1,935,000 9,361,000 11,296,000 3,522,000 Girard Plaza 52,000 4,685,000 4,700,000 9,385,000 405,000 Gold Star Plaza 755,000 1,644,000 7,274,000 8,918,000 3,409,000 Golden Triangle 12,824,000 2,320,000 22,537,000 24,857,000 10,288,000 Groton Shopping Center 8,552,000 3,113,000 20,829,000 23,942,000 6,453,000 Halifax Plaza 562,000 1,347,000 6,426,000 7,773,000 3,059,000 Hamburg Square 6,332,000 1,153,000 11,010,000 12,163,000 4,210,000 Jordan Lane 1,122,000 4,291,000 22,298,000 26,589,000 8,744,000 Kempsville Crossing (2,754,000 ) 2,207,000 8,246,000 10,453,000 3,399,000 Kings Plaza 1,684,000 2,408,000 14,293,000 16,701,000 4,489,000 Lawndale Plaza 1,091,000 3,635,000 22,945,000 26,580,000 4,783,000 Meadows Marketplace 11,959,000 1,914,000 11,959,000 13,873,000 4,324,000 Newport Plaza 586,000 1,682,000 8,383,000 10,065,000 3,948,000 New London Mall 4,797,000 8,807,000 35,848,000 44,655,000 15,186,000 Northside Commons 10,108,000 3,379,000 10,061,000 13,440,000 2,863,000 Norwood Shopping Center 1,017,000 1,874,000 9,470,000 11,344,000 3,447,000 Oak Ridge Shopping Center 471,000 960,000 4,725,000 5,685,000 1,878,000 Oakland Commons (344,000 ) 2,504,000 15,318,000 17,822,000 5,904,000 Oakland Mills 1,088,000 1,530,000 7,461,000 8,991,000 3,088,000 Palmyra Shopping Center 2,082,000 1,488,000 8,648,000 10,136,000 3,731,000 Pine Grove Plaza 579,000 1,622,000 7,456,000 9,078,000 3,386,000 Quartermaster Plaza 3,548,000 37,031,000 57,758,000 94,789,000 13,019,000 Riverview Plaza 9,598,000 10,872,000 48,800,000 59,672,000 20,002,000 San Souci Plaza 5,182,000 13,406,000 25,070,000 38,476,000 13,092,000 Senator Square 2,485,000 - 7,812,000 7,812,000 1,145,000 Shoppes at Arts District 75,000 2,247,000 18,691,000 20,938,000 3,338,000 South Philadelphia 17,210,000 10,363,000 51,383,000 61,746,000 23,388,000 Southington Center 1,704,000 - 13,538,000 13,538,000 5,429,000 Swede Square 8,254,000 2,272,000 14,482,000 16,754,000 6,309,000 The Brickyard 4,821,000 7,648,000 34,113,000 41,761,000 12,923,000 The Point 19,534,000 2,996,000 30,038,000 33,034,000 13,507,000 The Shops at Bloomfield Station 393,000 625,000 18,067,000 18,692,000 3,097,000 The Shops at Suffolk Downs 10,547,000 7,580,000 21,636,000 29,216,000 7,942,000 Timpany Plaza 2,366,000 3,368,000 21,650,000 25,018,000 7,006,000 Trexler Mall 13,691,000 6,932,000 46,506,000 53,438,000 16,945,000 Trexlertown Plaza 31,032,000 15,674,000 52,574,000 68,248,000 14,866,000 Valley Plaza 1,903,000 1,950,000 9,669,000 11,619,000 4,490,000 Washington Center Shoppes 6,891,000 2,000,000 14,266,000 16,266,000 6,315,000 Webster Plaza 4,035,000 4,082,000 21,916,000 25,998,000 7,353,000 Yorktowne Plaza 2,560,000 5,801,000 28,204,000 34,005,000 10,323,000 Other 1,525,000 878,000 2,612,000 3,490,000 332,000 Total Portfolio $ 349,105,000 $ 284,694,000 $ 1,242,784,000 $ 1,527,478,000 $ 428,569,000 Cedar Realty Trust, Inc. Schedule III Real Estate and Accumulated Depreciation The changes in real estate and accumulated depreciation for the years ended December 31, 2020, 2019 and 2018, respectively, are as follows: Cost 2020 2019 2018 Balance, beginning of the year $ 1,515,206,000 $ 1,508,682,000 $ 1,534,599,000 Properties transferred to held for sale (22,512,000 ) (36,265,000 ) (61,505,000 ) Property acquisitions — 9,333,000 6,481,000 Outparcel dispositions (840,000 ) — — Improvements and betterments 35,624,000 37,089,000 29,107,000 Asset write-offs — (3,633,000 ) — Balance, end of the year $ 1,527,478,000 (c) $ 1,515,206,000 $ 1,508,682,000 Accumulated depreciation Balance, beginning of the year $ 389,861,000 $ 361,969,000 $ 341,943,000 Properties transferred to held for sale (3,947,000 ) (10,143,000 ) (14,886,000 ) Outparcel dispositions (90,000 ) — — Depreciation expense (d) 42,745,000 41,142,000 34,912,000 Asset write-offs — (3,107,000 ) — Balance, end of the year $ 428,569,000 $ 389,861,000 $ 361,969,000 Net book value $ 1,098,909,000 $ 1,125,345,000 $ 1,146,713,000 (a) Amount of encumbrance totals $45.6 million at December 31, 2020. (b) Negative amounts represent write-offs of fully depreciated assets. (c) At December 31, 2020, the aggregate cost for federal income tax purposes was approximately $25.6 million greater than the Company's recorded values. (d) Depreciation is provided over the estimated useful lives of the buildings and improvements, which range from 3 to 40 years.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Reverse Stock Split	Reverse Stock Split On November 25, 2020, the Company effected a 1-for-6.6 ,
Principles of Consolidation/Basis of Preparation	Principles of Consolidation/Basis of Preparation The consolidated financial statements include the accounts and operations of the Company, the Operating Partnership, its subsidiaries, and certain joint venture partnerships in which it participates. The Company consolidates all variable interest entities (“VIEs”) for which it is the primary beneficiary. Generally, a VIE is an entity with one or more of the following characteristics: (1) the total equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (2) as a group, the holders of the equity investment at risk (a) lack the power through voting or similar rights to make decisions about the entity’s activities that significantly impact the entity’s performance, (b) have no obligation to absorb the expected losses of the entity, or (c) have no right to receive the expected residual returns of the entity, or (3) the equity investors have voting rights that are not proportional to their economic interests, and substantially all of the entity’s activities either involve, or are conducted on behalf of, an investor that has disproportionately fewer voting rights. Significant judgments related to these determinations include estimates about the current values, performance of real estate held by these VIEs, and general market conditions. The Financial Accounting Standards Board (“FASB”) issued guidance which amended the consolidation requirements, including introducing a separate consolidation analysis specific to limited partnerships and other similar entities. Under the analysis, limited partnerships and other similar entities will be considered variable interest entities unless the limited partners hold substantive kick-out rights or participating rights. The guidance was adopted on January 1, 2016. The Company evaluated its existing joint venture property at San Souci Plaza based on the new guidance, determined the entity to be a variable interest entity, and continued to consolidate the entity. At December 31, 2020, this VIE owned real estate with a carrying value of $25.4 million and no mortgage loan payable. The Company has a 60%-owned joint venture originally formed to develop the project known as Crossroads II. This joint venture is consolidated as it is deemed to be a VIE and the Company is the primary beneficiary. The Company (1) guaranteed all related debt, (2) does not require its partners to fund additional capital requirements, (3) has an economic interest greater than its voting proportion and (4) directs the management activities that significantly impact the performance of the joint venture. At December 31, 2020, this VIE owned real estate with a carrying value of $36.9 million and no mortgage loan payable. The accompanying financial statements are prepared on the accrual basis in accordance with accounting principles generally accepted in the United States (“GAAP”), which requires management to make estimates and assumptions that affect the disclosure of contingent assets and liabilities, the reported amounts of assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the periods covered by the financial statements. Actual results could differ from these estimates.
Real Estate Investments	Real Estate Investments Real estate investments are carried at cost less accumulated depreciation. The provision for depreciation is calculated using the straight-line method based upon the estimated useful lives of the respective assets of between 3 and 40 years, with buildings being depreciated at the upper end of the range. Depreciation expense amounted to $43.6 million, $41.8 million and $36.1 million for 2020, 2019 and 2018, respectively. Expenditures for betterments that substantially extend the useful lives of the assets are capitalized. Expenditures for maintenance, repairs, and betterments that do not substantially prolong the normal useful life of an asset are charged to operations as incurred. Real estate investments include costs of development and redevelopment activities, and construction in progress. Capitalized costs, including interest and other carrying costs during the construction and/or renovation periods, are included in the cost of the related asset and charged to operations through depreciation over the asset’s estimated useful life. A variety of costs are incurred in the development and leasing of a property, such as pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs, and other costs incurred during the period of development. After a determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. The Company ceases capitalization on the portions substantially completed and occupied, or held available for occupancy, and capitalizes only those costs associated with the portions under development. The Company considers a construction project to be substantially completed and held available for occupancy upon the completion of tenant improvements, but not later than one year from cessation of major construction activity. The Company allocates the fair value of real estate acquired to land, buildings and improvements. In addition, the fair value of in-place leases is allocated to intangible lease assets and liabilities. The fair value of the tangible assets of an acquired property is determined by valuing the property as if it were vacant, which value is then allocated to land, buildings and improvements based on management’s determination of the fair values of these assets. In valuing an acquired property’s intangibles, factors considered by management include an estimate of carrying costs during the expected lease-up periods, such as real estate taxes, insurance, other operating expenses, and estimates of lost rental revenue during the expected lease-up periods based on its evaluation of current market demand. Management also estimates costs to execute similar leases, including leasing commissions, tenant improvements, legal and other related costs. The values of acquired above-market and below-market leases are recorded based on the present values (using discount rates which reflect the risks associated with the leases acquired) of the differences between the contractual amounts to be received and management’s estimate of market lease rates, measured over the terms of the respective leases that management deemed appropriate at the time of the acquisitions. Such valuations include consideration of the non-cancellable terms of the respective leases as well as any applicable renewal periods. The fair values associated with below-market rental renewal options are determined based on the Company’s experience and the relevant facts and circumstances that existed at the time of the acquisitions. The values of above-market leases are amortized to rental income over the terms of the respective non-cancelable lease periods. The portion of the values of below-market leases associated with the original non-cancelable lease terms are amortized to rental income over the terms of the respective non-cancelable lease periods. The portion of the values of the leases associated with below-market renewal options that are likely of exercise are amortized to rental income over the respective renewal periods. The value of other intangible assets (including leasing commissions, tenant improvements, etc.) is amortized to expense over the applicable terms of the respective leases. If a lease were to be terminated prior to its stated expiration or not renewed, all unamortized amounts relating to that lease would be recognized in operations at that time. Management reviews each real estate investment for impairment whenever events or circumstances indicate that the carrying value of a real estate investment may not be recoverable. The review of recoverability of real estate investments held for use is based on an estimate of the future cash flows that are expected to result from the real estate investment’s use and eventual disposition. These cash flows consider factors such as expected future operating income, trends and prospects, as well as the effects of leasing demand, capital expenditures, competition and other factors. If an impairment event exists due to the projected inability to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds estimated fair value. Effective January 1, 2018, the Company has adopted the guidance on gains and losses from the derecognition of nonfinancial assets. This guidance applies to all nonfinancial assets (including real estate) for which the counterparty is not a customer and also clarifies that all businesses are derecognized using the deconsolidation guidance. Additionally, it defines an in substance nonfinancial asset as a financial asset that is promised to a counterparty in a contract in which substantially all of the fair value of the asset promised in the contract is concentrated in nonfinancial assets, which excludes cash or cash equivalents and liabilities.
Properties Held For Sale	Properties Held For Sale The Company follows the guidance for reporting discontinued operations, whereby a disposal of an individual property or group of properties is required to be reported in “discontinued operations” only if the disposal represents a strategic shift that has, or will have, a major effect on the Company’s operations and financial results. The results of operations for those properties not meeting such criteria are reported in “continuing operations” in the consolidated statements of operations. The carrying values of the assets and liabilities of properties determined to be held for sale, principally the net book values of the real estate and the related mortgage loans payable expected to be assumed by the buyers, are reclassified as “held for sale” on the Company’s consolidated balance sheets at the time such determinations are made, on a prospective basis only. In addition, the Company anticipates that sales of all such properties remaining classified as “held for sale” at the balance sheet date will be concluded within one year from such date. The Company, when applicable, conducts a continuing review of the values for all properties “held for sale” based on final sales prices and sales contracts entered into. Impairment charges/reversals, if applicable, are based on a comparison of the carrying values of the properties with either (1) actual sales prices less costs to sell for properties sold, or contract amounts for properties in the process of being sold, (2) estimated sales prices, less costs to sell, based on discounted cash flow analyses, if no contract amounts are being negotiated (see Note 4 - “Fair Value Measurements”), or (3) with respect to land parcels, estimated sales prices, less costs to sell, based on comparable sales completed in the selected market areas. Prior to the Company’s determination to dispose of properties, which are subsequently reclassified to “held for sale”, the Company performed recoverability analyses based on the estimated undiscounted cash flows that were expected to result from the real estate investments’ use and eventual disposal. The projected undiscounted cash flows of each property reflects that the carrying value of each real estate investment would be recovered. However, as a result of the properties’ meeting the “held for sale” criteria, such properties were written down to the lower of their carrying value and estimated fair values less costs to sell.
Cash and Cash Equivalents / Restricted Cash	Cash and Cash Equivalents / Restricted Cash Cash and cash equivalents consist of cash in banks and short-term investments with original maturities when purchased of less than ninety days, and include cash at consolidated joint ventures of $0.2 million and $0.3 million at December 31, 2020 and 2019, respectively. The terms of mortgage loans payable may require the Company to deposit certain replacement and other reserves with its lenders. Such “restricted cash” is generally available only for property-level requirements for which the reserves have been established.
Fair Value Measurements	Fair Value Measurements The accounting guidance for fair value measurement establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels: • Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2 – Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. • Level 3 – Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible while also considering counterparty credit risk in the assessment of fair value.
Revenue Recognition and Receivables	Revenue Recognition and Receivables Management has determined that all of the Company’s leases with its various tenants are operating leases. Rental income with scheduled rent increases is recognized using the straight-line method over the respective non-cancelable terms of the leases. The aggregate excess of rental revenue recognized on a straight-line basis over the contractual base rents is included in receivables on the consolidated balance sheet. Leases also generally contain provisions under which the tenants reimburse the Company for a portion of property operating expenses and real estate taxes incurred, generally attributable to their respective allocable portions of gross leasable area. Such income is recognized in the periods earned. In addition, a limited number of operating leases contain contingent rent provisions under which tenants are required to pay, as additional rent, a percentage of their sales in excess of a specified amount. The Company defers recognition of contingent rental income until those specified sales targets are met. Revenues also include items such as lease termination fees, which tend to fluctuate more than rents from year to year. Termination fees are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration. The Company recognizes lease termination income when the following conditions are met: (1) the lease termination agreement has been executed, (2) the lease termination fee is determinable, (3) all the Company’s landlord services pursuant to the terminated lease have been rendered, and (4) collectability of the lease termination fee is assured. In November 2018, the FASB clarified the existing accounting treatment relating to receivables arising from operating leases, stating that such receivables are not within the scope of the expected credit loss standard and that impairment of receivables arising from operating leases should be accounted for in accordance with the recently-adopted lease accounting standard. This required the Company, as of January 1, 2019, to review its existing lease portfolio to determine if all future lease payments are probable of collection and, if the Company determined that all future lease payments are not probable of collection, the Company will account for these leases on a cash basis. This required that all amounts that were historically recorded as bad debt expense, and previously included in operating expenses in the Company’s consolidated statement of operations, now be recorded as a direct reduction of rental revenues. In accordance with this guidance, $8.3 million and $2.4 million of rental revenue relating to certain leases that were no longer deemed probable of collection were not recorded as rental revenue for the years ended December 31, 2020 and 2019, respectively. Of these amounts, $1.4 million and $0.3 million, respectively, represented deferred rent receivables that were written-off for the years ended December 31, 2020 and 2019. Prior to January 1, 2019, the Company made estimates as to the collectability of its accounts receivable related to base rent, straight-line rent, percentage rent, expense reimbursements and other revenues. When management analyzed accounts receivable and evaluated the adequacy of the allowance for doubtful accounts, it considered such things as historical bad debts, tenant creditworthiness, current economic trends, current developments relevant to a tenant’s business specifically and to its business category generally, and changes in tenants’ payment patterns. The allowance for doubtful accounts was $1.4 million and $0.6 million at December 31, 2020 and 2019, respectively. The provision for doubtful accounts (included in operating, maintenance and management expenses) was $1.5 million, $0.4 million and $2.2 million in 2020, 2019 and 2018, respectively.
Segment Information	Segment Information The Company’s primary business is the ownership and operation of grocery-anchored shopping centers Company’s revenues or property operating income, and the Company has no operations outside of the United States of America. Therefore, the Company has aggregated its properties into one reportable segment as the properties share similar long-term economic characteristics and have other similarities including the fact that they are operated using consistent business strategies, are typically located in major metropolitan areas, and have similar tenant mixes.
Income Taxes	Income Taxes The Company, organized in 1984, has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). A REIT will generally not be subject to federal income taxation on that portion of its income that qualifies as REIT taxable income, to the extent that it distributes at least 90% of such REIT taxable income to its stockholders and complies with certain other requirements. As of December 31, 2020, the Company was in compliance with all REIT requirements. The Company follows a two-step approach for evaluating uncertain federal, state and local tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that more-likely-than-not will be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The Company has not identified any uncertain tax positions which would require an accrual.
Derivative Financial Instruments	Derivative Financial Instruments The Company occasionally utilizes derivative financial instruments, principally interest rate swaps, to manage its exposure to fluctuations in interest rates. The Company has established policies and procedures for risk assessment, and the approval, reporting and monitoring of derivative financial instruments. Derivative financial instruments must be effective in reducing the Company’s interest rate risk exposure in order to qualify for hedge accounting. When the terms of an underlying transaction are modified, or when the underlying hedged item ceases to exist, all changes in the fair value of the instrument are marked-to-market with changes in value included in net income for each period until the derivative financial instrument matures or is settled. Any derivative financial instrument used for risk management that does not meet the hedging criteria is marked-to-market with the changes in value included in net income. The Company has not entered into, and does not plan to enter into, derivative financial instruments for trading or speculative purposes.
Share-Based Compensation	Share-Based Compensation During 2017, the Company’s shareholders approved the 2017 Stock Incentive Plan (the “2017 Plan”), which replaced the Company’s 2012 Stock Incentive Plan (the “2012 Plan”). As of the effective date of the 2017 Plan, the Company may not grant any further awards under the 2012 Plan. The 2017 Plan establishes the procedures for the granting of, among other things, restricted stock awards. On May 1, 2019, the Company’s shareholders approved an amendment to the 2017 Plan, which increased the maximum number of shares of the Company’s common stock that may be issued pursuant to the 2017 Plan by 303,000 shares, to a new total of 909,000 shares (see Note 14 – “Share-Based Compensation”), and the maximum number of shares that may be granted to a participant in any calendar year may not exceed 76,000. All grants issued pursuant to the 2017 Plan generally vest (1) at the end of designated time periods for time-based grants, or (2) upon the completion of a designated period of performance for performance-based grants and satisfaction of performance criteria. Time–based grants are valued according to the market price for the Company’s common stock at the date of grant. For performance-based grants, the Company generally engages an independent appraisal company to determine the value of the shares at the date of grant, taking into account the underlying contingency risks associated with the performance criteria. The value of all grants are being expensed on a straight-line basis over their respective vesting periods (irrespective of achievement of the market performance-based grants) adjusted, as applicable, for forfeitures. For restricted share grants subject to graded vesting, the amounts expensed are at least equal to the measured expense of each vested tranche. Based on the terms of the 2017 Plan, those grants of restricted shares that are contributed to the Rabbi Trusts are classified as treasury stock on the Company’s consolidated balance sheet.
Supplemental Consolidated Statement of Cash Flows Information	Supplemental Consolidated Statements of Cash Flows Information Years ended December 31, 2020 2019 2018 Supplemental disclosure of cash activities: Cash paid for interest $ 23,208,000 $ 23,859,000 $ 22,191,000 Supplemental disclosure of non-cash activities: Capitalization of interest and financing costs 2,674,000 1,649,000 1,528,000 Buildings and improvements included in accounts payable and accrued liabilites 2,976,000 3,669,000 521,000 Recognition of right-of-use assets and related lease liabilities 703,000 13,778,000 — Issuance of OP Units in connection with a land parcel acquisition — — 975,000
Issued and Adopted Accounting Pronouncements	Issued and Adopted Accounting Pronouncements In May 2014, the FASB issued guidance which amends the accounting for revenue recognition. Under the amended guidance, an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled to and receive in exchange for those goods or services. Leases are specifically excluded from this guidance and will be governed by the applicable lease codification. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In August 2016, the FASB issued guidance that clarifies how an entity should classify certain cash receipts and cash payments on its statement of cash flows. The guidance established that an entity will classify cash payments for debt prepayment or extinguishment costs as financing cash flows. In addition, the guidance provides entities with an alternative to consider regarding the nature of the source of distributions that an investor receives from an equity method investment when classifying distributions received in its cash flow statement (the nature of the distribution approach). Alternatively, entities can elect to classify the distributions received from equity method investees based on the cumulative earnings approach. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In November 2016, the FASB issued guidance that requires entities to show the changes in the total of cash, cash equivalents and restricted cash in the statement of cash flows. When cash, cash equivalents and restricted cash are presented in more than one line item on the balance sheet, the new guidance requires a reconciliation of the totals in the statement of cash flows to the related captions on the balance sheet. This reconciliation can be presented either on the face of the statement of cash flows or in the notes to the financial statements. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In May 2017, the FASB issued guidance which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as a modification. Under the new guidance, an entity will not apply modification accounting if the award’s fair value, vesting conditions, and the classification of the award as equity or a liability are the same immediately before and after the change. The guidance, effective January 1, 2018, did not have a material effect on the Company’s consolidated financial statements. In February 2016, the FASB issued guidance amending the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. The guidance, effective for annual and interim reporting periods beginning on or after December 15, 2018, requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The Company is not required to reassess the classification of existing ground leases where it is the lessee and therefore these leases will continue to be accounted for as operating leases. In the event the Company modifies existing ground leases or enters into new ground leases after adoption of the new standard, such leases may be classified as finance leases allocated payroll costs and other costs that are incurred regardless of whether the lease is obtained will no longer be capitalized as initial direct costs and instead will be expensed as incurred. During 2019, the Company expensed $ 2.8 million of leasing costs which would have previously been capitalized. The FASB provided lessors with a practical expedient, elected by class of underlying asset, to account for lease and non-lease components as a single lease component if certain criteria are met. Lessors that make these elections are required to provide additional disclosures. The FASB provided an additional (and optional) transition method that allows entities to initially apply the guidance at the adoption date (January 1, 2019) and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company applied both these practical expedients upon adoption. In November 2018, the FASB clarified the existing accounting treatment relating to receivables arising from operating leases, stating that such receivables are not within the scope of the expected credit loss standard and that impairment of receivables arising from operating leases should be accounted for in accordance with the recently-adopted lease accounting standard. This required the Company to review its existing lease portfolio to determine if all future lease payments are probable of collection and, if the Company determined that all future lease payments are not probable of collection, the Company will account for these leases on a cash basis. This required that all amounts that were historically recorded as bad debt expense, and previously included in operating expenses in the Company’s consolidated statement of operations, now be recorded as a direct reduction of rental revenues. As permitted by the standard upon adoption, the Company recorded a $0.5 million prior-period adjustment to opening equity which the Company has reflected in the consolidated statement of equity for 2019. In June 2016, the FASB issued guidance which enhances the methodology of measuring expected credit losses to include the use of forward-looking information to better calculate credit loss estimates. The guidance will apply to most financial assets measured at amortized cost and certain other instruments, including accounts receivable, loans, held-to-maturity debt securities, net investments in leases, and off-balance-sheet credit exposures. The guidance will require that the Company estimate the lifetime expected credit loss with respect to these receivables and record allowances that, when deducted from the balance of the receivables, represent the net amounts expected to be collected. The Company will also be required to disclose information about how it developed the allowances, including changes in the factors that influenced the Company’s estimate of expected credit losses and the reasons for those changes. The guidance was effective January 1, 2020, and the guidance did not have a material effect on the Company’s consolidated financial statements. In April 2020, the FASB issued a question-and-answer document (the “Lease Modification Q&A”) focused on the application of lease accounting guidance to lease concessions provided as a result of a novel strain of coronavirus (“COVID-19”). Under existing lease guidance, the Company would have to determine, on a lease by lease basis, if a lease concession was the result of a new arrangement reached with the tenant (treated with the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification Q&A clarifies that entities may elect to not evaluate whether lease-related relief that lessors provide to mitigate the economic effects of COVID-19 on lessees is a lease modification under ASC 842. Instead, an entity that elects not to evaluate whether a concession directly related to COVID-19 is a modification can then elect whether to apply the modification guidance (i.e. assume the relief was always contemplated by the contract or assume the relief was not contemplated by the contract). Both lessees and lessors may make this election. The Company evaluated its election on a disaggregated basis, with such election applied consistently to leases with similar characteristics and similar circumstances. During 2020, the Company provided lease concessions to certain tenants in response to the impact of COVID-19, in the form of rent deferrals. The Company has made an election to account for such lease concessions consistent with how those concessions would be accounted for under ASC 842 if enforceable rights and obligations for those concessions had already existed in the leases. This election is available for concessions related to the effects of the COVID-19 pandemic that do not result in a substantial increase in our rights as lessor, including concessions that result in the total payments required by the modified lease being substantially the same as or less than total payments required by the original lease. Substantially all of the Company’s concessions to date provide for a deferral of payments with no substantive changes to the consideration in the original lease. These deferrals affect the timing, but not the amount, of the lease payments. The Company is accounting for these deferrals as if no changes to the lease were made. Under this accounting, the Company increases its receivables as tenant payments accrue and continues to recognize rental income. During 2020, the Company has entered into lease modifications that deferred approximately $ million, of which $ million relates to deferrals that the Company continued to recognize rental income. In addition, during 2020, the Company has entered into agreements that waived approximately $ million of rent.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Supplemental Consolidated Statements of Cash Flows Information	Supplemental Consolidated Statements of Cash Flows Information Years ended December 31, 2020 2019 2018 Supplemental disclosure of cash activities: Cash paid for interest $ 23,208,000 $ 23,859,000 $ 22,191,000 Supplemental disclosure of non-cash activities: Capitalization of interest and financing costs 2,674,000 1,649,000 1,528,000 Buildings and improvements included in accounts payable and accrued liabilites 2,976,000 3,669,000 521,000 Recognition of right-of-use assets and related lease liabilities 703,000 13,778,000 — Issuance of OP Units in connection with a land parcel acquisition — — 975,000

Real Estate (Tables)

Real Estate (Tables)	12 Months Ended
	Dec. 31, 2020
Real Estate [Abstract]
Real Estate and Accumulated Depreciation	Real estate activity for 2020 and 2019 is composed of the following: Years ended December 31, 2020 2019 Cost Balance, beginning of year $ 1,515,206,000 $ 1,508,682,000 Properties transferred to held for sale (22,512,000 ) (36,265,000 ) Property acquisitions — 9,333,000 Outparcel dispositions (840,000 ) — Asset write-offs — (3,633,000 ) Improvements and betterments 35,624,000 37,089,000 Balance, end of the year $ 1,527,478,000 $ 1,515,206,000 Accumulated depreciation Balance, beginning of the year $ 389,861,000 $ 361,969,000 Properties transferred held for sale (3,947,000 ) (10,143,000 ) Outparcel dispositions (90,000 ) — Asset write-offs — (3,107,000 ) Depreciation expense 42,745,000 41,142,000 Balance, end of the year $ 428,569,000 $ 389,861,000 Net book value $ 1,098,909,000 $ 1,125,345,000
Schedule of Transactions Related to Properties Held for Sale/Conveyance	Dispositions During 2020, 2019 and 2018, the Company sold the properties listed below: Date Sales Gain on Property Location Sold Price Sale 2020 Metro Square Owings Mills, MD 7/9/2020 $ 4,288,000 $ - Oakland Mills outparcel building Columbia, MD 9/17/2020 1,050,000 643,000 Glen Allen Shopping Center Glen Allen, VA 10/8/2020 8,540,000 1,780,000 Pine Grove Plaza outparcel building Brown Mills, NJ 11/2/2020 1,100,000 565,000 Suffolk Plaza Suffolk, VA 12/10/2020 6,950,000 1,408,000 $ 21,928,000 $ 4,396,000 2019 Maxatawny Marketplace Maxatawny, PA 2/15/2019 $ 10,330,000 $ 101,000 Fort Washington Center Fort Washington, PA 6/26/2019 9,048,000 2,841,000 $ 19,378,000 $ 2,942,000 2018 Mechanicsburg Center Mechanicsburg, PA 8/28/2018 $ 16,100,000 $ 4,864,000 West Bridgewater Plaza West Bridgewater, MA 9/28/2018 3,500,000 - $ 19,600,000 $ 4,864,000

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at a Fair Value on Recurring Basis	The following tables show the hierarchy for those assets measured at fair value on a recurring basis as of December 31, 2020 and December 31, 2019, respectively: December 31, 2020 Description Level 1 Level 2 Level 3 Total Investments related to deferred compensation liabilities (a) $ 948,000 $ — $ — $ 948,000 Deferred compensation liabilities (b) $ 952,000 $ — $ — $ 952,000 Interest rate swaps liability (b) $ — $ 18,927,000 $ — $ 18,927,000 December 31, 2019 Description Level 1 Level 2 Level 3 Total Investments related to deferred compensation liabilities (a) $ 823,000 $ — $ — $ 823,000 Deferred compensation liabilities (b) $ 824,000 $ — $ — $ 824,000 Interest rate swaps asset (a) $ — $ 136,000 $ — $ 136,000 Interest rate swaps liability (b) $ — $ 7,180,000 $ — $ 7,180,000 (a) Included in other assets and deferred charges, net, in the accompanying consolidated balance sheets. (b) Included in accounts payable and accrued liabilities in the accompanying consolidated balance sheets.

Receivables (Tables)

Receivables (Tables)	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Components of Receivables	Receivables at December 31, 2020 and 2019 are composed of the following: December 31, 2020 2019 Rents and other receivables, net (a) $ 6,541,000 $ 5,061,000 Mortgage note receivable 3,500,000 3,500,000 Straight-line rents, net 11,911,000 13,603,000 $ 21,952,000 $ 22,164,000 (a) Includes $1.9 million of net receivables related to deferred rent as a result of COVID-19 as of December 31, 2020

Other Assets and Deferred Cha_2

Other Assets and Deferred Charges, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Components of Other Assets and Deferred Charges, Net	Other assets and deferred charges, net, at December 31, 2020 and 2019 are composed of the following: December 31, 2020 2019 Lease origination costs (a) $ 22,331,000 $ 19,947,000 Right-of-use assets (b) 13,828,000 13,638,000 Prepaid expenses 6,906,000 6,048,000 Investments related to share-based compensation 948,000 823,000 Unsecured revolving credit facility financing costs 623,000 1,021,000 Leasehold improvements, furniture and fixtures 85,000 200,000 Interest rate swaps — 136,000 Other 534,000 326,000 Total other assets and deferred charges, net $ 45,255,000 $ 42,139,000 (a) Lease origination costs include the unamortized balance of intangible lease assets resulting from purchase accounting allocations of $5.5 million (cost of $19.4 million and accumulated amortization of $13.9 million) and $6.6 million (cost of $19.9 million and accumulated amortization of $13.3 million) as of December 31, 2020 and 2019, respectively. (b) In connection with of the new lease accounting standard (see Note 2 – “Issued and Adopted Accounting Pronouncements”), the Company recorded right-of-use assets and liabilities based on its future obligation under its ground lease and executive office lease agreements for which the Company is the lessee.
Schedule of Future Charges of Unamortized Balances of Deferred Lease Origination Costs and Deferred Financing Costs	Lease Unsecured revolving origination credit facility costs financing costs 2021 $ 2,436,000 $ 623,000 2022 2,094,000 — 2023 1,805,000 — 2024 1,467,000 — 2025 1,196,000 — Thereafter 13,333,000 — $ 22,331,000 $ 623,000

Mortgage Loans Payable and Un_2

Mortgage Loans Payable and Unsecured Credit Facilities (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of Debt and Finance Lease Obligations Related to Continuing Operations	Debt and finance lease obligations are composed of the following at December 31, 2020 and 2019: December 31, 2020 December 31, 2019 Contractual Contractual Maturity Balance interest rates Balance interest rates Description dates outstanding weighted-average outstanding weighted-average Fixed-rate mortgage Jun 2026 $ 45,645,000 3.9% $ 46,679,000 3.9% Finance lease obligation Sep 2050 5,631,000 5.3% 5,665,000 5.3% Unsecured credit facilities: Variable-rate: Revolving credit facility Sep 2021 (a) 175,000,000 2.7%(b) 106,000,000 3.2% Term loan Sep 2022 50,000,000 1.9% 50,000,000 3.3% Fixed-rate (c): Term loan Feb 2022 50,000,000 3.3% 50,000,000 3.0% Term loan Sep 2022 50,000,000 3.5% 50,000,000 2.8% Term loan Apr 2023 100,000,000 3.5% 100,000,000 3.2% Term loan Sep 2024 75,000,000 3.9% 75,000,000 3.7% Term loan Jul 2025 75,000,000 4.8% 75,000,000 4.6% Term loan n/a - - 75,000,000 3.6% 626,276,000 3.4% 633,344,000 3.5% Unamortized issuance costs (2,002,000 ) (2,769,000 ) $ 624,274,000 $ 630,575,000 (a) The revolving credit facility is subject to a one-year (b) The interest rate on the revolving credit facility consists of LIBOR plus a credit spread based on the Company’s leverage ratio. The Company has an interest rate swap agreement expiring in February 2021 (c) The interest rates on these term loans consist of LIBOR plus a credit spread based on the Company’s leverage ratio, for which the Company has interest rate swap agreements which convert the LIBOR rates to fixed rates. Accordingly, these term loans are presented as fixed-rate debt.
Summary of the Remaining Unsecured Term Loans	The details of the remaining unsecured term loans are as follows: Amount Maturity date Interest range $ 50,000,000 February 2022 LIBOR + 130 bps to 190 bps $ 50,000,000 September 2022 LIBOR + 130 bps to 190 bps $ 100,000,000 April 2023 LIBOR + 165 bps to 225 bps $ 75,000,000 September 2024 LIBOR + 170 bps to 225 bps $ 75,000,000 July 2025 LIBOR + 170 bps to 225 bps
Schedule of Principal Payments on Mortgage Loan Payable, Finance Lease Obligation, Unsecured Term Loans, and Unsecured Credit Facility	Scheduled principal payments on a mortgage loan payable, finance lease obligation, unsecured term loans, and the unsecured credit facility at December 31, 2020, due on various dates from 2021 to 2050, are as follows: Mortgage Loan Finance Lease Revolving Term Unamortized Year Payable Obligation Credit Facility Loans Total Issuance Costs Total 2021 $ 1,074,000 $ 35,000 175,000,000 (a) $ - $ 176,109,000 $ (647,000 ) $ 175,462,000 2022 1,116,000 37,000 - 150,000,000 151,153,000 (499,000 ) 150,654,000 2023 1,160,000 39,000 - 100,000,000 101,199,000 (274,000 ) 100,925,000 2024 1,206,000 41,000 - 75,000,000 76,247,000 (207,000 ) 76,040,000 2025 1,253,000 44,000 - 75,000,000 76,297,000 (115,000 ) 76,182,000 Thereafter 39,836,000 5,435,000 - - 45,271,000 (260,000 ) 45,011,000 $ 45,645,000 $ 5,631,000 $ 175,000,000 $ 400,000,000 $ 626,276,000 $ (2,002,000 ) $ 624,274,000 (a) The revolving credit facility is subject to a one-year
Summary of Derivative Financial Instruments Held	The following is a summary of the derivative financial instruments held by the Company at December 31, 2020 and December 31, 2019: December 31, 2020 Designation/ Fair Maturity Balance sheet Cash flow Derivative Count value dates location Qualifying Interest rate swaps 7 $ 18,927,000 2021-2025 Accounts payable and accrued liabilities December 31, 2019 Designation/ Fair Maturity Balance sheet Cash flow Derivative Count value dates location Qualifying Interest rate swaps 2 $ 136,000 2020-2023 Other assets and deferred charges, net Qualifying Interest rate swaps 6 $ 7,180,000 2021-2025 Accounts payable and accrued liabilities
Effect of Derivative Financial Instruments on Consolidated Statements of Operations and Consolidated Statements of Equity	The following presents the effect of the Company’s derivative financial instruments on the consolidated statements of operations and the consolidated statements of equity 2020, 2019 and 2018, respectively: (Loss) gain recognized in other comprehensive (loss) income (effective portion) Designation/ Years ended December 31, Cash flow Derivative 2020 2019 2018 Qualifying Interest rate swaps $ (17,940,000 ) $ (13,090,000 ) $ 2,185,000 Gain (loss) recognized in other comprehensive (loss) income reclassified into earnings (effective portion) Years ended December 31, Classification 2020 2019 2018 Continuing Operations $ (6,062,000 ) $ 1,196,000 $ 667,000

Intangible Lease Asset_Liabil_2

Intangible Lease Asset/Liability (Tables)	12 Months Ended
	Dec. 31, 2020
Intangible Lease Asset Liability [Abstract]
Schedule of Unamortized Balance of Intangible Lease Liabilities Net	The unamortized balance of intangible lease liabilities at December 31, 2020 is net of accumulated amortization of $32.3 million, and will be credited to future operations as follows: 2021 $ 931,000 2022 865,000 2023 794,000 2024 630,000 2025 619,000 Thereafter 5,100,000 $ 8,939,000

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Summary of Reconciliation of Undiscounted Future Minimum Lease Payments for its Ground Lease and Executive Office Lease Agreements to Right-of-Use Liabilities	The following table represents a reconciliation of the Company’s undiscounted future minimum lease payments for its ground lease and executive office lease agreements applicable to right-of-use liabilities as of December 31, 2020: 2021 $ 1,113,000 2022 1,112,000 2023 1,112,000 2024 1,114,000 2025 993,000 Thereafter 28,554,000 Total undiscounted future minimum lease payments 33,998,000 Future minimum lease payments, discount (19,921,000 ) Right-of-use liabilities $ 14,077,000

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Schedule of Dividends	The following table provides a summary of dividends declared and paid per share: Years ended December 31, 2020 2019 2018 Common stock $ 0.528 $ 1.320 $ 1.320 7.25% Series B Preferred Stock $ 1.812 $ 1.812 $ 1.812 6.50% Series C Preferred Stock $ 1.625 $ 1.625 $ 1.625
Preferred Stock [Member]
Summary of Preferred Stock	The Company is authorized to issue up to 12,500,000 shares of preferred stock. The following tables summarize details about the Company’s preferred stock: Series B Series C Preferred Stock Preferred Stock Par value $ 0.01 $ 0.01 Liquidation value $ 25.00 $ 25.00 December 31, 2020 December 31, 2019 Series B Series C Series B Series C Preferred Stock Preferred Stock Preferred Stock Preferred Stock Shares authorized 1,450,000 6,450,000 1,450,000 6,450,000 Shares issued and outstanding 1,450,000 5,000,000 1,450,000 5,000,000 Balance $ 34,767,000 $ 124,774,000 $ 34,767,000 124,774,000

Revenues (Tables)

Revenues (Tables)	12 Months Ended
	Dec. 31, 2020
Revenues [Abstract]
Schedule of Rent Revenues	Rents for 2020, 2019 and 2018, respectively, are comprised of the following: Years ended December 31, 2020 2019 2018 Base rents $ 95,987,000 $ 105,041,000 $ 107,630,000 Expense recoveries 29,241,000 33,475,000 33,378,000 Percentage rent 1,778,000 971,000 725,000 Straight-line rents (1,208,000 ) 405,000 1,142,000 Amortization of intangible lease liabilities, net 1,373,000 2,827,000 4,361,000 Total rents $ 127,171,000 $ 142,719,000 $ 147,236,000
Schedule of Annual Future Base Rents Due to be Received	Annual future base rents due to be received under non-cancelable operating leases in effect at December 31, 2020 are approximately as follows (excluding those base rents applicable to properties classified as real estate held for sale): 2021 $ 93,213,000 2022 85,973,000 2023 85,650,000 2024 75,194,000 2025 62,652,000 Thereafter 334,634,000 $ 737,316,000

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share Based Compensation [Abstract]
Schedule of Share-Based Compensation Information	The following tables set forth certain share-based compensation information for 2020, 2019, and 2018, respectively: Years ended December 31, 2020 2019 2018 Expense relating to share/unit grants $ 3,954,000 $ 4,496,000 $ 4,217,000 Amounts capitalized (231,000 ) (379,000 ) (454,000 ) Total charged to operations $ 3,723,000 $ 4,117,000 $ 3,763,000 Weighted average Shares grant date value Unvested shares/units, December 31, 2019 645,000 $ 27.92 Restricted share grants 63,000 $ 17.48 Vested during period (59,000 ) $ 37.73 Forfeitures/cancellations (7,000 ) $ 40.38 Unvested shares/units, December 31, 2020 642,000 $ 25.86

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share	The following table provides a reconciliation of the numerator and denominator of the EPS calculations for the 2020, 2019 and 2018, respectively: Years ended December 31, 2020 2019 2018 Numerator Net (loss) income $ (520,000 ) $ 1,566,000 $ 4,358,000 Preferred stock dividends (10,752,000 ) (10,752,000 ) (10,863,000 ) Preferred stock redemption costs - - (3,507,000 ) Net (income) attributable to noncontrolling interests (552,000 ) (490,000 ) (469,000 ) Net earnings allocated to unvested shares (238,000 ) (558,000 ) (628,000 ) Net (loss) attributable to vested common shares $ (12,062,000 ) $ (10,234,000 ) $ (11,109,000 ) Denominator Weighted average number of vested common shares outstanding, basic and diluted 13,104,000 13,082,000 13,397,000 Net (loss) per common share attributable to common shareholders, basic and diluted $ (0.92 ) $ (0.78 ) $ (0.83 )

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Schedule of Selected Quarterly Financial Data	Quarter ended March 31 June 30 September 30 December 31 2020 Revenues $ 42,485,000 $ 28,620,000 $ 31,175,000 $ 33,258,000 Net (loss) income $ (2,098,000 ) $ (6,009,000 ) $ 1,404,000 $ 6,183,000 Net (loss) income attributable to common shareholders $ (4,934,000 ) $ (8,785,000 ) $ (1,421,000 ) $ 3,316,000 Per common share (basic and diluted) (a) $ (0.39 ) $ (0.67 ) $ (0.11 ) $ 0.25 2019 Revenues $ 36,883,000 $ 35,660,000 $ 35,912,000 $ 35,628,000 Net income (loss) $ 2,989,000 $ 5,544,000 $ 2,947,000 $ (9,914,000 ) Net income (loss) attributable to common shareholders $ 194,000 $ 2,695,000 $ 92,000 $ (12,657,000 ) Per common share (basic and diluted) (a) $ 0.00 $ 0.20 $ (0.00 ) $ (0.98 ) (a) Differences between the sum of the four quarterly per share amounts and the annual per share amounts, if any, are attributable to the effect of the weighted average outstanding share calculation for the respective periods.

Business and Organization (Deta

Business and Organization (Details)	12 Months Ended
	Dec. 31, 2020propertyshares
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Number of properties | property	54
OP units outstanding | shares	81,000
Cedar Realty Trust Partnership L.P [Member]
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Company's interest in Operating Partnership	99.40%
Limited partners' interest in Operating Partnership	0.60%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details)	Nov. 25, 2020	Dec. 31, 2020USD ($)Segment	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017shares	May 01, 2019shares	Apr. 30, 2019shares	Jan. 01, 2019USD ($)
Summary Of Significant Accounting Policies [Line Items]
VIE real estate owned carrying value		$ 1,527,478,000	$ 1,515,206,000	$ 1,508,682,000
Mortgage loan payable		45,385,000	46,370,000
Depreciation expense		43,600,000	41,800,000	36,100,000
Cash at consolidated joint ventures		200,000	300,000
Uncollectible lease rental revenue		8,300,000	2,400,000
Deferred rent receivables written-off		1,400,000	300,000
Allowance for doubtful accounts receivable		1,400,000	600,000
Provision for doubtful accounts included in operating, maintenance and management expenses		$ 1,500,000	400,000	$ 2,200,000
Number of reportable segment | Segment		1
Operating lease, right-of-use asset		$ 13,828,000	13,638,000					$ 14,600,000
Operating lease, right-of-use liability		14,077,000						$ 14,600,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]								us-gaap:AccountsPayableAndAccruedLiabilitiesMember
Operating lease cost			2,800,000
Adjustment to opening equity prior period			$ 500,000
Lease rent deferred		3,200,000
Lease rent deferrals continued to recognize rental income		2,400,000
Lease rent waived		$ 1,500,000
2017 Stock Incentive Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Maximum number of shares may be issued under the plan | shares						909,000	303,000
Maximum number of shares to be granted per year to a participant | shares					76,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Real estate investments useful life		3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Real estate investments useful life		40 years
Variable Interest Entity, Primary Beneficiary [Member] | Other Ownership Interest [Member]
Summary Of Significant Accounting Policies [Line Items]
VIE real estate owned carrying value		$ 36,900,000
Mortgage loan payable		$ 0
Variable Interest Entity, Primary Beneficiary [Member] | Crossroads II [Member] | Other Ownership Interest [Member]
Summary Of Significant Accounting Policies [Line Items]
Ownership percentage		60.00%
Variable Interest Entity, Primary Beneficiary [Member] | San Souci Plaza [Member]
Summary Of Significant Accounting Policies [Line Items]
VIE real estate owned carrying value		$ 25,400,000
Mortgage loan payable		$ 0
Common Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity, reverse stock split, conversion ratio	0.15
Stockholders' equity, reverse stock split		Each 6.6 shares of the Company's issued and outstanding common stock were combined into one share of the Company's common stock.

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Supplemental Consolidated Statements of Cash Flows Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental disclosure of cash activities:
Cash paid for interest	$ 23,208,000	$ 23,859,000	$ 22,191,000
Supplemental disclosure of non-cash activities:
Capitalization of interest and financing costs	2,674,000	1,649,000	1,528,000
Buildings and improvements included in accounts payable and accrued liabilites	2,976,000	3,669,000	521,000
Recognition of right-of-use assets and related lease liabilities	$ 703,000	$ 13,778,000
Issuance of OP Units in connection with a land parcel acquisition			$ 975,000

Real Estate (Real Estate and Ac

Real Estate (Real Estate and Accumulated Depreciation) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cost
Balance, beginning of year		$ 1,515,206,000	$ 1,508,682,000
Properties transferred to held for sale		(22,512,000)	(36,265,000)	$ (61,505,000)
Property acquisitions			9,333,000	6,481,000
Outparcel dispositions		(840,000)
Asset write-offs			(3,633,000)
Improvements and betterments		35,624,000	37,089,000	29,107,000
Balance, end of the year		1,527,478,000	1,515,206,000	1,508,682,000
Accumulated depreciation
Balance, beginning of the year		389,861,000	361,969,000
Properties transferred held for sale		(3,947,000)	(10,143,000)	(14,886,000)
Outparcel dispositions		(90,000)
Asset write-offs			(3,107,000)
Depreciation expense	[1]	42,745,000	41,142,000	34,912,000
Balance, end of the year		428,569,000	389,861,000	361,969,000
Net book value		$ 1,098,909,000	$ 1,125,345,000	$ 1,146,713,000
[1]	Depreciation is provided over the estimated useful lives of the buildings and improvements, which range from 3 to 40 years.

Real Estate (Narrative) (Detail

Real Estate (Narrative) (Details)	Jul. 23, 2020USD ($)Memberworkforce$ / ft²	Jun. 19, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Real Estate Properties [Line Items]
Purchase price				$ 9,083,000	$ 179,000
Impairment charges			$ 7,607,000	8,938,000	20,689,000
Commercial Lease Agreement [Member] | Development Asset [Member] | Government of the District of Columbia (“District”) [Member]
Real Estate Properties [Line Items]
Lease agreement entered date	Jul. 23, 2020
Number of member workforce planned to house new office headquarters | Memberworkforce	700
Term of lease	20 years 10 months
Lessor, operating lease not yet commenced, Description			The Company anticipates commencement of construction to occur in the first quarter of 2021 and currently estimates that the space will be delivered during the end of the fourth quarter 2022
Initial annual net rent amount to be paid upon completion of building	$ 5,400,000
Annual escalator percentage to be paid on each anniversary of rent commencement	2.50%
Operating costs, property taxes and amortization of tenant improvements	$ 8,100,000
Annual net rent amount to be paid upon completion of building	$ 13,500,000
Free rent period	10 months
Tenant credit against either annual rent or any other tenant payment obligations including tenant improvement costs, in excess of tenant improvement allowance	$ 6,800,000
Amortized over period	240 months
Commercial Lease Agreement [Member] | Development Asset [Member] | Government of the District of Columbia (“District”) [Member] | Between the 10th and 12th Lease Years [Member]
Real Estate Properties [Line Items]
Additional per rentable square foot tenant improvement allowance to be contributed | $ / ft²	9.38
Commercial Lease Agreement [Member] | Development Asset [Member] | Government of the District of Columbia (“District”) [Member] | Maximum [Member]
Real Estate Properties [Line Items]
Landlord contribution to be made per rentable square foot toward cost of tenant improvements | $ / ft²	155
Girard Plaza [Member]
Real Estate Properties [Line Items]
Purchase price		$ 8,500,000
Metro Square [Member]
Real Estate Properties [Line Items]
Impairment charges			$ 7,200,000
West Bridgewater Plaza [Member]
Real Estate Properties [Line Items]
Impairment charges					9,400,000
Real Estate Held for Sale [Member]
Real Estate Properties [Line Items]
Impairment charges			$ 400,000	$ 8,900,000	$ 11,300,000

Real Estate (Schedule of Transa

Real Estate (Schedule of Transactions Related to Properties Held for Sale/Conveyance) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Real Estate Properties [Line Items]
Gain on Sale	$ 4,396,000	$ 2,942,000	$ 4,864,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Sales Price	21,928,000	19,378,000	19,600,000
Gain on Sale	$ 4,396,000	$ 2,942,000	$ 4,864,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Metro Square [Member]
Real Estate Properties [Line Items]
Location	Owings Mills, MD
Date Sold	Jul. 9, 2020
Sales Price	$ 4,288,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Maxatawny Marketplace [Member]
Real Estate Properties [Line Items]
Location		Maxatawny, PA
Date Sold		Feb. 15, 2019
Sales Price		$ 10,330,000
Gain on Sale		$ 101,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mechanicsburg Center [Member]
Real Estate Properties [Line Items]
Location			Mechanicsburg, PA
Date Sold			Aug. 28, 2018
Sales Price			$ 16,100,000
Gain on Sale			$ 4,864,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | West Bridgewater Plaza [Member]
Real Estate Properties [Line Items]
Location			West Bridgewater, MA
Date Sold			Sep. 28, 2018
Sales Price			$ 3,500,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Oakland Mills Outparcel Building [Member]
Real Estate Properties [Line Items]
Location	Columbia, MD
Date Sold	Sep. 17, 2020
Sales Price	$ 1,050,000
Gain on Sale	$ 643,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Fort Washington Center [Member]
Real Estate Properties [Line Items]
Location		Fort Washington, PA
Date Sold		Jun. 26, 2019
Sales Price		$ 9,048,000
Gain on Sale		$ 2,841,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Glen Allen Shopping Center [Member]
Real Estate Properties [Line Items]
Location	Glen Allen, VA
Date Sold	Oct. 8, 2020
Sales Price	$ 8,540,000
Gain on Sale	$ 1,780,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Pine Grove Plaza Outparcel Building [Member]
Real Estate Properties [Line Items]
Location	Brown Mills, NJ
Date Sold	Nov. 2, 2020
Sales Price	$ 1,100,000
Gain on Sale	$ 565,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Suffolk Plaza [Member]
Real Estate Properties [Line Items]
Location	Suffolk, VA
Date Sold	Dec. 10, 2020
Sales Price	$ 6,950,000
Gain on Sale	$ 1,408,000

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020USD ($)property	Dec. 31, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of fixed rate mortgage loans payable	$ 47,000,000	$ 47,000,000
Carrying value of fixed rate mortgage payable	$ 45,400,000	46,400,000
Number of properties | property	54
Real estate held for sale	$ 9,498,000	$ 13,230,000
Nonrecurring Basis [Member] | Level 3 [Member] | Assets [Member] | Retail Properties [Member] | Direct Capitalization Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of properties | property	1
Real estate held for sale	$ 2,100,000
Nonrecurring Basis [Member] | Level 3 [Member] | Assets [Member] | Retail Properties [Member] | Direct Capitalization Approach [Member] | Measurement Input Cap Rate [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization rate	8.50%
Nonrecurring Basis [Member] | Level 3 [Member] | Assets [Member] | Retail Properties [Member] | Discounted Cash Flow Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of properties | property	1
Real estate held for sale	$ 7,400,000
Nonrecurring Basis [Member] | Level 3 [Member] | Assets [Member] | Retail Properties [Member] | Discounted Cash Flow Approach [Member] | Measurement Input Cap Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization rate	11.50%
Nonrecurring Basis [Member] | Level 3 [Member] | Assets [Member] | Retail Properties [Member] | Discounted Cash Flow Approach [Member] | Measurement Input Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	8.00%

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Assets and Liabilities Measured at a Fair Value on Recurring Basis) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments related to deferred compensation liabilities	$ 948,000	$ 823,000
Interest rate swaps asset		136,000
Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments related to deferred compensation liabilities	948,000	823,000
Deferred compensation liabilities	952,000	824,000
Interest rate swaps liability	18,927,000	7,180,000
Interest rate swaps asset		136,000
Recurring Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments related to deferred compensation liabilities	948,000	823,000
Deferred compensation liabilities	952,000	824,000
Recurring Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps liability	$ 18,927,000	7,180,000
Interest rate swaps asset		$ 136,000

Concentration of Credit Risk (D

Concentration of Credit Risk (Details) - property	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Number of properties	54
Pennsylvania [Member]
Concentration Risk [Line Items]
Number of properties	23
Revenues [Member] | Ahold N.V. [Member]
Concentration Risk [Line Items]
Percentage of concentration risk	13.00%	12.00%	11.00%

Receivables (Details)

Receivables (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Rents and other receivables, net	$ 6,541,000	$ 5,061,000
Mortgage note receivable	3,500,000	3,500,000
Straight-line rents, net	11,911,000	13,603,000
Receivables	$ 21,952,000	$ 22,164,000

Receivables (Parenthetical) (De

Receivables (Parenthetical) (Details) $ in Millions	Dec. 31, 2020USD ($)
Receivables [Abstract]
Net receivables related to deferred rent	$ 1.9

Other Assets and Deferred Cha_3

Other Assets and Deferred Charges, Net (Components of Other Assets and Deferred Charges, Net) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Deferred Costs And Other Assets [Line Items]
Lease origination costs	$ 22,331,000	$ 19,947,000
Right-of-use assets	13,828,000	13,638,000	$ 14,600,000
Prepaid expenses	6,906,000	6,048,000
Investments related to share-based compensation	948,000	823,000
Unsecured revolving credit facility financing costs	2,002,000	2,769,000
Leasehold improvements, furniture and fixtures	85,000	200,000
Interest rate swaps		136,000
Other	534,000	326,000
Total other assets and deferred charges, net	45,255,000	42,139,000
Intangible Lease Assets [Member]
Deferred Costs And Other Assets [Line Items]
Deferred charges, net	5,500,000	6,600,000
Cost of intangible lease assets	19,400,000	19,900,000
Accumulated amortization of intangible lease assets	13,900,000	13,300,000
Unsecured Revolving Credit Facility [Member]
Deferred Costs And Other Assets [Line Items]
Unsecured revolving credit facility financing costs	623,000	$ 1,021,000
Accumulated amortization of intangible lease assets	$ 37,100,000

Other Assets and Deferred Cha_4

Other Assets and Deferred Charges, Net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs And Other Assets [Line Items]
Amortization expense of deferred charges	$ 6.2	$ 5.3	$ 5.2
Unsecured Revolving Credit Facility [Member]
Deferred Costs And Other Assets [Line Items]
Accumulated amortization of deferred lease origination costs	37.1
Accumulated amortization of deferred financing costs	$ 2.1

Other Assets and Deferred Cha_5

Other Assets and Deferred Charges, Net (Schedule of Future Charges of Unamortized Balances of Deferred Lease Origination Costs and Deferred Financing Costs) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred Costs And Other Assets [Line Items]
Lease origination costs, 2021	$ 2,436,000
Lease origination costs, 2022	2,094,000
Lease origination costs, 2023	1,805,000
Lease origination costs, 2024	1,467,000
Lease origination costs, 2025	1,196,000
Lease origination costs, thereafter	13,333,000
Lease origination costs	22,331,000	$ 19,947,000
Financing costs	2,002,000	2,769,000
Unsecured Revolving Credit Facility [Member]
Deferred Costs And Other Assets [Line Items]
Financing costs, 2021	623,000
Financing costs	$ 623,000	$ 1,021,000

Mortgage Loans Payable and Un_3

Mortgage Loans Payable and Unsecured Credit Facilities (Schedule of Debt and Finance Lease Obligations Related to Continuing Operations) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Mortgage loans payable	$ 45,385,000	$ 46,370,000
Total debt gross	626,276,000
Credit facilities	175,000,000	106,000,000
Unamortized issuance costs	(2,002,000)	(2,769,000)
Total debt	624,274,000
Finance Lease Obligation [Member]
Debt Instrument [Line Items]
Total debt gross	5,631,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt gross	175,000,000
Credit facilities	$ 75,000,000
Term Loan [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 28, 2022
Credit facilities	$ 50,000,000
Term Loan Two [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Sep. 30, 2022
Credit facilities	$ 50,000,000
Term Loan Three [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Apr. 30, 2023
Credit facilities	$ 100,000,000
Term Loan Four [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Sep. 30, 2024
Credit facilities	$ 75,000,000
Term Loan Five [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Jul. 31, 2025
Credit facilities	$ 75,000,000
Continuing Operations [Member]
Debt Instrument [Line Items]
Total debt gross	626,276,000	633,344,000
Total debt	$ 624,274,000	$ 630,575,000
Weighted average contractual interest rate	3.40%	3.50%
Continuing Operations [Member] | Finance Lease Obligation [Member]
Debt Instrument [Line Items]
Maturity date	Sep. 30, 2050
Total debt gross	$ 5,631,000	$ 5,665,000
Weighted average contractual interest rate	5.30%	5.30%
Continuing Operations [Member] | Fixed-Rate Mortgage [Member]
Debt Instrument [Line Items]
Maturity date	Jun. 30, 2026
Mortgage loans payable	$ 45,645,000	$ 46,679,000
Weighted average contractual interest rate	3.90%	3.90%
Continuing Operations [Member] | Fixed-Rate Mortgage [Member] | Term Loan Two [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 28, 2022
Credit facilities	$ 50,000,000	$ 50,000,000
Weighted average contractual interest rate	3.30%	3.00%
Continuing Operations [Member] | Fixed-Rate Mortgage [Member] | Term Loan Three [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Sep. 30, 2022
Credit facilities	$ 50,000,000	$ 50,000,000
Weighted average contractual interest rate	3.50%	2.80%
Continuing Operations [Member] | Fixed-Rate Mortgage [Member] | Term Loan Four [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Apr. 30, 2023
Credit facilities	$ 100,000,000	$ 100,000,000
Weighted average contractual interest rate	3.50%	3.20%
Continuing Operations [Member] | Fixed-Rate Mortgage [Member] | Term Loan Five [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Sep. 30, 2024
Credit facilities	$ 75,000,000	$ 75,000,000
Weighted average contractual interest rate	3.90%	3.70%
Continuing Operations [Member] | Fixed-Rate Mortgage [Member] | Term Loan Six [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Jul. 31, 2025
Credit facilities	$ 75,000,000	$ 75,000,000
Weighted average contractual interest rate	4.80%	4.60%
Continuing Operations [Member] | Fixed-Rate Mortgage [Member] | Term Loan Seven [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Jul. 31, 2025
Credit facilities		$ 75,000,000
Weighted average contractual interest rate		3.60%
Continuing Operations [Member] | Variable-Rate Mortgage [Member] | Revolving Credit Facility [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Sep. 30, 2021
Credit facilities	$ 175,000,000	$ 106,000,000
Weighted average contractual interest rate	2.70%	3.20%
Continuing Operations [Member] | Variable-Rate Mortgage [Member] | Term Loan [Member] | Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	Sep. 30, 2022
Credit facilities	$ 50,000,000	$ 50,000,000
Weighted average contractual interest rate	1.90%	3.30%

Mortgage Loans Payable and Un_4

Mortgage Loans Payable and Unsecured Credit Facilities (Schedule of Debt and Finance Lease Obligations Related to Continuing Operations) (Parenthetical) (Details) - USD ($)	Sep. 08, 2017	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Credit facilities		$ 175,000,000	$ 106,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility extension allowed period	1 year	1 year
Credit facilities		$ 75,000,000
Credit facility, fixed interest rate		3.90%
Debt instrument, expiration date		Feb. 28, 2021
Basis spread on borrowings variable rate		1.65%
Credit facility, effective interest rate		2.70%
Revolving Credit Facility [Member] | Variable-Rate Mortgage [Member]
Debt Instrument [Line Items]
Basis spread on borrowings variable rate		1.80%
Credit facility,remaining borrowing capacity		$ 100,000,000

Mortgage Loans Payable and Un_5

Mortgage Loans Payable and Unsecured Credit Facilities (Narrative) (Details) - USD ($)	Aug. 04, 2020	Sep. 08, 2017	Dec. 31, 2020	Feb. 11, 2021	Dec. 31, 2019
Line Of Credit Facility [Line Items]
Credit facilities			$ 175,000,000		$ 106,000,000
Approximate amount of accumulated other comprehensive loss to be reclassified into earnings			6,900,000
Interest Rate Swap [Member]
Line Of Credit Facility [Line Items]
Interest rate swaps liability			18,900,000
Derivative, notional amount			$ 425,000,000		$ 425,000,000
Unsecured Credit Facility [Member]
Line Of Credit Facility [Line Items]
Credit facility borrowing capacity	$ 300,000,000	$ 300,000,000
Aggregate borrowing capacity including increase under accordion feature	$ 750,000,000
Revolving Credit Facility [Member]
Line Of Credit Facility [Line Items]
Credit facility expiration date			Feb. 28, 2021
Line of credit facility extension allowed period		1 year	1 year
Basis spread on borrowings variable rate			1.65%
Credit facilities			$ 75,000,000
Revolving Credit Facility [Member] | Subsequent Event [Member]
Line Of Credit Facility [Line Items]
Credit facility borrowing capacity				$ 56,700,000
Credit facilities				$ 175,000,000
Revolving Credit Facility [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Basis spread on borrowings variable rate	1.35%
Revolving Credit Facility [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Basis spread on borrowings variable rate	1.95%
Revolving Credit Facility [Member] | Unsecured Credit Facility [Member]
Line Of Credit Facility [Line Items]
Credit facility borrowing capacity		$ 250,000,000
Credit facility expiration date		Sep. 8, 2021
Term loan facility [Member]
Line Of Credit Facility [Line Items]
Basis spread on borrowings variable rate			1.60%
Term loan facility [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Basis spread on borrowings variable rate	1.30%
Term loan facility [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Basis spread on borrowings variable rate	1.90%
Term loan facility [Member] | Unsecured Credit Facility [Member]
Line Of Credit Facility [Line Items]
Credit facility borrowing capacity		$ 50,000,000
Credit facility expiration date		Sep. 8, 2022

Mortgage Loans Payable and Un_6

Mortgage Loans Payable and Unsecured Credit Facilities (Summary of the Remaining Unsecured Term Loans) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Line Of Credit Facility [Line Items]
Amount	$ 175,000,000	$ 106,000,000
Term Loan [Member] | Unsecured Term Loans [Member]
Line Of Credit Facility [Line Items]
Amount	$ 50,000,000
Maturity date	Feb. 28, 2022
Term Loan [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Interest range	1.30%
Term Loan [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Interest range	1.90%
Term Loan Two [Member] | Unsecured Term Loans [Member]
Line Of Credit Facility [Line Items]
Amount	$ 50,000,000
Maturity date	Sep. 30, 2022
Term Loan Two [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Interest range	1.30%
Term Loan Two [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Interest range	1.90%
Term Loan Three [Member] | Unsecured Term Loans [Member]
Line Of Credit Facility [Line Items]
Amount	$ 100,000,000
Maturity date	Apr. 30, 2023
Term Loan Three [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Interest range	1.65%
Term Loan Three [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Interest range	2.25%
Term Loan Four [Member] | Unsecured Term Loans [Member]
Line Of Credit Facility [Line Items]
Amount	$ 75,000,000
Maturity date	Sep. 30, 2024
Term Loan Four [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Interest range	1.70%
Term Loan Four [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Interest range	2.25%
Term Loan Five [Member] | Unsecured Term Loans [Member]
Line Of Credit Facility [Line Items]
Amount	$ 75,000,000
Maturity date	Jul. 31, 2025
Term Loan Five [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Interest range	1.70%
Term Loan Five [Member] | Unsecured Term Loans [Member] | LIBOR [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Interest range	2.25%

Mortgage Loans Payable and Un_7

Mortgage Loans Payable and Unsecured Credit Facilities (Schedule of Principal Payments on Mortgage Loan Payable, Finance Lease Obligation, Unsecured Term Loans, and Unsecured Credit Facility) (Details) - USD ($)	Sep. 08, 2017	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument, Gross
2021		$ 176,109,000
2022		151,153,000
2023		101,199,000
2024		76,247,000
2025		76,297,000
Thereafter		45,271,000
Total		626,276,000
Unamortized Debt Issuance Costs
2021		(647,000)
2022		(499,000)
2023		(274,000)
2024		(207,000)
2025		(115,000)
Thereafter		(260,000)
Unamortized Debt Issuance Costs		(2,002,000)	$ (2,769,000)
Debt Instrument, Net
2021		175,462,000
2022		150,654,000
2023		100,925,000
2024		76,040,000
2025		76,182,000
Thereafter		45,011,000
Total debt		624,274,000
Revolving Credit Facility [Member]
Debt Instrument, Gross
2021		175,000,000
Total		$ 175,000,000
Debt Instrument, Net
Line of credit facility extension allowed period	1 year	1 year
Term Loan [Member]
Debt Instrument, Gross
2022		$ 150,000,000
2023		100,000,000
2024		75,000,000
2025		75,000,000
Total		400,000,000
Mortgage Loans Payable [Member]
Debt Instrument, Gross
2021		1,074,000
2022		1,116,000
2023		1,160,000
2024		1,206,000
2025		1,253,000
Thereafter		39,836,000
Total		45,645,000
Finance Lease Obligation [Member]
Debt Instrument, Gross
2021		35,000
2022		37,000
2023		39,000
2024		41,000
2025		44,000
Thereafter		5,435,000
Total		$ 5,631,000

Mortgage Loans Payable and Un_8

Mortgage Loans Payable and Unsecured Credit Facilities (Summary of Derivative Financial Instruments Held) (Details) - Interest Rate Swap [Member]	12 Months Ended
	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)contract
Cash Flow Hedging, Count 7 [Member]
Derivatives Fair Value [Line Items]
Count | contract	7
Fair value | $	$ 18,927,000
Cash Flow Hedging, Count 7 [Member] | Minimum [Member]
Derivatives Fair Value [Line Items]
Maturity dates	2021
Cash Flow Hedging, Count 7 [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Maturity dates	2025
Cash Flow Hedging, Count 2 [Member]
Derivatives Fair Value [Line Items]
Count | contract		2
Fair value | $		$ 136,000
Cash Flow Hedging, Count 2 [Member] | Minimum [Member]
Derivatives Fair Value [Line Items]
Maturity dates		2020
Cash Flow Hedging, Count 2 [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Maturity dates		2023
Cash Flow Hedging, Count 6 [Member]
Derivatives Fair Value [Line Items]
Count | contract		6
Fair value | $		$ 7,180,000
Cash Flow Hedging, Count 6 [Member] | Minimum [Member]
Derivatives Fair Value [Line Items]
Maturity dates		2021
Cash Flow Hedging, Count 6 [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Maturity dates		2025

Mortgage Loans Payable and Un_9

Mortgage Loans Payable and Unsecured Credit Facilities (Effect of Derivative Financial Instruments on Consolidated Statements of Operations and Consolidated Statements of Equity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Designation/Cash Flow [Member] | Interest Rate Swap [Member]
Derivative Instruments Gain Loss [Line Items]
(Loss) gain recognized in other comprehensive (loss) income (effective portion)	$ (17,940,000)	$ (13,090,000)	$ 2,185,000
Continuing Operations [Member]
Derivative Instruments Gain Loss [Line Items]
Gain (loss) recognized in other comprehensive (loss) income reclassified into earnings (effective portion)	$ (6,062,000)	$ 1,196,000	$ 667,000

Intangible Lease Asset_Liabil_3

Intangible Lease Asset/Liability (Narrative) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Intangible Lease Asset Liability [Abstract]
Unamortized intangible lease liabilities	$ 8,939,000	$ 10,473,000
Unamortized intangible lease assets	200,000	$ 400,000
Accumulated amortization	$ 32,300,000

Intangible Lease Asset_Liabil_4

Intangible Lease Asset/Liability (Schedule of Unamortized Balance of Intangible Lease Liabilities Net) (Details)	Dec. 31, 2020USD ($)
Intangible Lease Asset Liability [Abstract]
2021	$ 931,000
2022	865,000
2023	794,000
2024	630,000
2025	619,000
Thereafter	5,100,000
Unamortized intangible lease liabilities	$ 8,939,000

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Lease expiration month and year	2021-02
2021	$ 0.1
Weighted average remaining lease term	30 years 8 months 12 days
Weighted average discount rate	5.70%
Rent expense	$ 1.8	$ 1.7	$ 1.1

Commitments and Contingencies_3

Commitments and Contingencies (Summary of Reconciliation of Undiscounted Future Minimum Lease Payments for its Ground Lease and Executive Office Lease Agreements to Right-of-Use Liabilities) (Details) - USD ($)	Dec. 31, 2020	Jan. 01, 2019
Commitments And Contingencies Disclosure [Abstract]
2021	$ 1,113,000
2022	1,112,000
2023	1,112,000
2024	1,114,000
2025	993,000
Thereafter	28,554,000
Total undiscounted future minimum lease payments	33,998,000
Future minimum lease payments, discount	(19,921,000)
Right-of-use liabilities	$ 14,077,000	$ 14,600,000

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) $ / shares in Units, $ in Millions	Jan. 15, 2021$ / shares	Nov. 25, 2020	Jan. 12, 2018USD ($)$ / sharesshares	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018$ / sharesshares	Dec. 18, 2018USD ($)$ / sharesshares
Class Of Stock [Line Items]
Preferred stock, shares authorized | shares				12,500,000
Common stock repurchase, authorized | $							$ 30
Common stock repurchase, shares | shares						117,000
Common stock repurchase, weighted average price per share | $ / shares						$ 19.91
Additional number of common stock shares repurchased | shares					311,000		428,000
Additional common stock repurchased, weighted average price per share | $ / shares					$ 22.03		$ 21.45
Stock price as percentage of market value				100.00%
Remaining shares authorized under DRIP | shares				427,000
Accrued preferred stock dividends | $				$ 1.2	$ 1.2
Subsequent Event [Member]
Class Of Stock [Line Items]
Dividends payable, date declared	Jan. 15, 2021
Common stock, dividends declared | $ / shares	$ 0.066
Dividends payable, date to be paid	Feb. 22, 2021
Dividends payable, date of record	Feb. 10, 2021
Common Stock [Member]
Class Of Stock [Line Items]
Stockholders' equity, reverse stock split, conversion ratio		0.15
Stockholders' equity, reverse stock split				Each 6.6 shares of the Company's issued and outstanding common stock were combined into one share of the Company's common stock.
Series B [Member]
Class Of Stock [Line Items]
Dividend rate percentage				7.25%	7.25%	7.25%
Redemption date				May 22, 2017
Redemption price per share | $ / shares			$ 25	$ 25
Preferred stock, shares authorized | shares				1,450,000	1,450,000
Preferred stock redeemed, shares | shares			2,000,000
Redemption price plus accrued and unpaid dividends amount | $			$ 50
Series B [Member] | Subsequent Event [Member]
Class Of Stock [Line Items]
Preferred stock dividends declared | $ / shares	$ 0.453125
Series C [Member]
Class Of Stock [Line Items]
Dividend rate percentage				6.50%	6.50%	6.50%
Redemption date				Aug. 24, 2022
Redemption price per share | $ / shares				$ 25
Preferred stock, shares authorized | shares				6,450,000	6,450,000
Series C [Member] | Subsequent Event [Member]
Class Of Stock [Line Items]
Preferred stock dividends declared | $ / shares	$ 0.406250

Shareholders' Equity (Summary o

Shareholders' Equity (Summary of Preferred Stock) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Class Of Stock [Line Items]
Preferred stock, shares authorized	12,500,000
Preferred stock	$ 159,541,000	$ 159,541,000
Series B Preferred Stock [Member]
Class Of Stock [Line Items]
Par value	$ 0.01
Liquidation value	$ 25
Preferred stock, shares authorized	1,450,000	1,450,000
Shares issued	1,450,000	1,450,000
Shares outstanding	1,450,000	1,450,000
Preferred stock	$ 34,767,000	$ 34,767,000
Series C Preferred Stock [Member]
Class Of Stock [Line Items]
Par value	$ 0.01
Liquidation value	$ 25
Preferred stock, shares authorized	6,450,000	6,450,000
Shares issued	5,000,000	5,000,000
Shares outstanding	5,000,000	5,000,000
Preferred stock	$ 124,774,000	$ 124,774,000

Shareholders' Equity (Schedule

Shareholders' Equity (Schedule of Dividends) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class Of Stock [Line Items]
Common stock	$ 0.528	$ 1.320	$ 1.320
Series B Preferred Stock [Member]
Class Of Stock [Line Items]
Cumulative Redeemable Preferred Stock	$ 1.812	$ 1.812	$ 1.812
Dividend rate percentage	7.25%	7.25%	7.25%
Series C Preferred Stock [Member]
Class Of Stock [Line Items]
Cumulative Redeemable Preferred Stock	$ 1.625	$ 1.625	$ 1.625
Dividend rate percentage	6.50%	6.50%	6.50%

Revenues (Schedule of Rent Reve

Revenues (Schedule of Rent Revenues) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues [Abstract]
Base rents	$ 95,987,000	$ 105,041,000	$ 107,630,000
Expense recoveries	29,241,000	33,475,000	33,378,000
Percentage rent	1,778,000	971,000	725,000
Straight-line rents	(1,208,000)	405,000	1,142,000
Amortization of intangible lease liabilities, net	1,373,000	2,827,000	4,361,000
Total rents	$ 127,171,000	$ 142,719,000	$ 147,236,000

Revenues (Narrative) (Details)

Revenues (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended								12 Months Ended
	Apr. 30, 2018	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessor Lease Description [Line Items]
Payment accepted on termination of lease prior to contractual expiration	$ 4,300,000											$ 4,300,000
Total revenues		$ 33,258,000	$ 31,175,000	$ 28,620,000	$ 42,485,000	$ 35,628,000	$ 35,912,000	$ 35,660,000	$ 36,883,000	$ 135,538,000	$ 144,083,000	152,020,000
Expense recoveries										31,100,000	$ 34,400,000	34,100,000
Contract Termination [Member]
Lessor Lease Description [Line Items]
Total revenues												5,400,000
Cash payment reduced by straight line rent receivable												500,000
Accelerated Intangible Lease Liability Amortization [Member] | Contract Termination [Member]
Lessor Lease Description [Line Items]
Total revenues												1,500,000
Other Income [Member] | Contract Termination [Member]
Lessor Lease Description [Line Items]
Total revenues										$ 7,100,000		$ 3,800,000

Revenues (Schedule of Annual Fu

Revenues (Schedule of Annual Future Base Rents Due to be Received Under Non-Cancelable Operating Leases) (Details)	Dec. 31, 2020USD ($)
Revenues [Abstract]
2021	$ 93,213,000
2022	85,973,000
2023	85,650,000
2024	75,194,000
2025	62,652,000
Thereafter	334,634,000
Future rents due to be received	$ 737,316,000

401(k) Retirement Plan (Details

401(k) Retirement Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Retirement plan, employer contribution amount	$ 375,000	$ 387,000	$ 371,000

Share-Based Compensation (Sched

Share-Based Compensation (Schedule of Share-Based Compensation Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation [Abstract]
Expense relating to share/unit grants	$ 3,954,000	$ 4,496,000	$ 4,217,000
Amounts capitalized	(231,000)	(379,000)	(454,000)
Total charged to operations	$ 3,723,000	$ 4,117,000	$ 3,763,000
Unvested shares/units, December 31, 2019	645,000
Restricted share grants	63,000
Vested during period	(59,000)
Forfeitures/cancellations	(7,000)
Unvested shares/units, December 31, 2020	642,000	645,000
Unvested shares/unit, December 31, 2019, weighted average grant date fair value	$ 27.92
Restricted share grants, weighted average grant date fair value	17.48
Vested during period, weighted average grant date fair value	37.73
Forfeitures/cancellations, weighted average grant date fair value	40.38
Unvested shares/unit, December 31, 2020, weighted average grant date fair value	$ 25.86	$ 27.92

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($)	Jun. 15, 2018	Jun. 15, 2011	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value per share			$ 17.48
Fair value of vested shares			$ 938,000	$ 485,000	$ 7,556,000
Shares vested			59,000
Shares forfeited			7,000
Grant date market price	$ 28.91
Shares granted under Stock incentive plan			63,000
Effective date of the employment agreement	Jun. 15, 2023
Maximum shares to be earned			114,000
Share based compensation average annual total stock holders return, description			The percentage of the market performance-based equity award to be earned will be determined based on the Company’s average annual TSR over the Interim Performance Period and/or over the Full Performance Period as follows: if average annual TSR (1) is below 4%, the percentage of grant earned would be 0%, (2) equals 4%, the percentage of grant earned would be 33.3%, (3) equals 6.5%, the percentage of grant earned would be 66.7%, and (4) equals 10% or above, the percentage of grant earned would be 100%.
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted to Company's President		378,800
Average annual TSR threshold		6.50%
Vesting period		7 years
Time-Based Awards [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested	189,400
Performance-Based Shares [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares forfeited	189,400
Time-Based Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares will vest upon the fifth anniversary	152,000
Market Performance-Based Equity Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, interim period other than option grant, price per share	$ 21.78
Share based compensation, full performance period other than option grant, price per share	$ 19.60
Market Performance-Based Equity Award [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted under Stock incentive plan	227,000
Dividend equivalent rights	227,000
2017 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under Stock Incentive Plan	38,000		300,000
Aggregate cost of awards not yet recognized			$ 5,800,000
Unrecognized cost recognition period			2 years 1 month 6 days
Shares granted under Stock incentive plan	114,000
2017 Plan [Member] | Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued			63,000	79,000	92,000
Weighted-average grant date fair value per share			$ 17.48	$ 21.25	$ 32.54
New Amended and Restated Employment Agreement [Member] | Time-Based Restricted Shares [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted to Company's President	152,000
Grant date market price	$ 28.91

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average nonvested restricted shares outstanding	400,000	400,000	500,000
Weighted average number of OP units outstanding	81,000	83,000	65,000
Market Performance-Based Equity Award [Member] | Chief Executive Officer [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares issuable under Stock incentive plan	0	0	0

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of Calculation of Numerator and Denominator in Earnings Per Share) (Details) - USD ($)	3 Months Ended																12 Months Ended
	Dec. 31, 2020		Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net (loss) income	$ 6,183,000		$ 1,404,000		$ (6,009,000)		$ (2,098,000)		$ (9,914,000)		$ 2,947,000		$ 5,544,000		$ 2,989,000		$ (520,000)	$ 1,566,000	$ 4,358,000
Preferred stock dividends																	(10,752,000)	(10,752,000)	(10,863,000)
Preferred stock redemption costs																			(3,507,000)
Net (income) attributable to noncontrolling interests																	(552,000)	(490,000)	(469,000)
Net earnings allocated to unvested shares																	(238,000)	(558,000)	(628,000)
Net (loss) attributable to vested common shares																	$ (12,062,000)	$ (10,234,000)	$ (11,109,000)
Weighted average number of vested common shares outstanding, basic and diluted																	13,104,000	13,082,000	13,397,000
Net (loss) per common share attributable to common shareholders, basic and diluted	$ 0.25	[1]	$ (0.11)	[1]	$ (0.67)	[1]	$ (0.39)	[1]	$ (0.98)	[1]	$ 0	[1]	$ 0.20	[1]	$ 0	[1]	$ (0.92)	$ (0.78)	$ (0.83)
[1]	Differences between the sum of the four quarterly per share amounts and the annual per share amounts, if any, are attributable to the effect of the weighted average outstanding share calculation for the respective periods.

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Details) - USD ($)	3 Months Ended																12 Months Ended
	Dec. 31, 2020		Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 33,258,000		$ 31,175,000		$ 28,620,000		$ 42,485,000		$ 35,628,000		$ 35,912,000		$ 35,660,000		$ 36,883,000		$ 135,538,000	$ 144,083,000	$ 152,020,000
Net (loss) income	6,183,000		1,404,000		(6,009,000)		(2,098,000)		(9,914,000)		2,947,000		5,544,000		2,989,000		(520,000)	1,566,000	4,358,000
Net (loss) income attributable to common shareholders	$ 3,316,000		$ (1,421,000)		$ (8,785,000)		$ (4,934,000)		$ (12,657,000)		$ 92,000		$ 2,695,000		$ 194,000		$ (11,824,000)	$ (9,676,000)	$ (10,481,000)
Per common share (basic and diluted)	$ 0.25	[1]	$ (0.11)	[1]	$ (0.67)	[1]	$ (0.39)	[1]	$ (0.98)	[1]	$ 0	[1]	$ 0.20	[1]	$ 0	[1]	$ (0.92)	$ (0.78)	$ (0.83)
[1]	Differences between the sum of the four quarterly per share amounts and the annual per share amounts, if any, are attributable to the effect of the weighted average outstanding share calculation for the respective periods.

Schedule III - Real Estate an_2

Schedule III - Real Estate and Accumulated Depreciation (Details)		12 Months Ended
		Dec. 31, 2020USD ($)property		Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Gross Leasable Area | property		8,084,797
Initial cost to the Company, Land		$ 285,607,000
Initial cost to the Company, Building and Improvements		892,766,000
Subsequent cost capitalized	[1]	349,105,000
Gross carrying amount of Land		284,694,000
Gross carrying amount of building and improvements		1,242,784,000
SEC Schedule III, Real Estate, Gross, Total		1,527,478,000	[2]	$ 1,515,206,000	$ 1,508,682,000	$ 1,534,599,000
Accumulated Depreciation		$ 428,569,000		$ 389,861,000	$ 361,969,000	$ 341,943,000
Academy Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2001
Percent Owned		100.00%
Gross Leasable Area | property		137,415
Initial cost to the Company, Land		$ 2,406,000
Initial cost to the Company, Building and Improvements		9,623,000
Subsequent cost capitalized	[1]	6,107,000
Gross carrying amount of Land		2,406,000
Gross carrying amount of building and improvements		15,730,000
SEC Schedule III, Real Estate, Gross, Total		18,136,000
Accumulated Depreciation		$ 6,651,000
Academy Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1965
Academy Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2013
Big Y Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2013
Percent Owned		100.00%
Year built/Year last renovated		2007
Gross Leasable Area | property		101,105
Initial cost to the Company, Land		$ 11,272,000
Initial cost to the Company, Building and Improvements		23,395,000
Subsequent cost capitalized	[1]	361,000
Gross carrying amount of Land		10,268,000
Gross carrying amount of building and improvements		24,760,000
SEC Schedule III, Real Estate, Gross, Total		35,028,000
Accumulated Depreciation		$ 5,560,000
Camp Hill [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2002
Percent Owned		100.00%
Gross Leasable Area | property		430,198
Initial cost to the Company, Land		$ 4,460,000
Initial cost to the Company, Building and Improvements		17,857,000
Subsequent cost capitalized	[1]	40,626,000
Gross carrying amount of Land		4,093,000
Gross carrying amount of building and improvements		58,850,000
SEC Schedule III, Real Estate, Gross, Total		62,943,000
Accumulated Depreciation		$ 24,270,000
Camp Hill [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1958
Camp Hill [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2005
Carmans Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Gross Leasable Area | property		195,485
Initial cost to the Company, Land		$ 8,539,000
Initial cost to the Company, Building and Improvements		35,804,000
Subsequent cost capitalized	[1]	18,641,000
Gross carrying amount of Land		8,421,000
Gross carrying amount of building and improvements		54,563,000
SEC Schedule III, Real Estate, Gross, Total		62,984,000
Accumulated Depreciation		$ 17,896,000
Carmans Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1954
Carmans Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2007
Christina Crossing [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2017
Percent Owned		100.00%
Year built/Year last renovated		2008
Gross Leasable Area | property		119,446
Initial cost to the Company, Land		$ 4,341,000
Initial cost to the Company, Building and Improvements		23,227,000
Subsequent cost capitalized	[1]	1,603,000
Gross carrying amount of Land		4,341,000
Gross carrying amount of building and improvements		24,830,000
SEC Schedule III, Real Estate, Gross, Total		29,171,000
Accumulated Depreciation		$ 3,595,000
Coliseum Marketplace [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Gross Leasable Area | property		106,648
Initial cost to the Company, Land		$ 2,924,000
Initial cost to the Company, Building and Improvements		14,416,000
Subsequent cost capitalized	[1]	5,629,000
Gross carrying amount of Land		3,586,000
Gross carrying amount of building and improvements		19,383,000
SEC Schedule III, Real Estate, Gross, Total		22,969,000
Accumulated Depreciation		$ 8,465,000
Coliseum Marketplace [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1987
Coliseum Marketplace [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2012
Colonial Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2011
Percent Owned		100.00%
Gross Leasable Area | property		410,432
Initial cost to the Company, Land		$ 9,367,000
Initial cost to the Company, Building and Improvements		37,496,000
Subsequent cost capitalized	[1]	7,846,000
Gross carrying amount of Land		9,367,000
Gross carrying amount of building and improvements		45,342,000
SEC Schedule III, Real Estate, Gross, Total		54,709,000
Accumulated Depreciation		$ 16,580,000
Colonial Commons [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2011
Colonial Commons [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2013
Crossroads II [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2008
Percent Owned		60.00%
Year built/Year last renovated		2009
Gross Leasable Area | property		133,717
Initial cost to the Company, Land		$ 15,383,000
Subsequent cost capitalized	[1]	29,734,000
Gross carrying amount of Land		17,671,000
Gross carrying amount of building and improvements		27,446,000
SEC Schedule III, Real Estate, Gross, Total		45,117,000
Accumulated Depreciation		$ 8,147,000
East River Park [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2015
Percent Owned		100.00%
Gross Leasable Area | property		150,038
Initial cost to the Company, Land		$ 9,143,000
Initial cost to the Company, Building and Improvements		30,893,000
Subsequent cost capitalized	[1]	7,514,000
Gross carrying amount of Land		9,398,000
Gross carrying amount of building and improvements		38,152,000
SEC Schedule III, Real Estate, Gross, Total		47,550,000
Accumulated Depreciation		$ 6,558,000
East River Park [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1946
East River Park [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1996
Elmhurst Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2006
Percent Owned		100.00%
Gross Leasable Area | property		66,254
Initial cost to the Company, Land		$ 1,371,000
Initial cost to the Company, Building and Improvements		5,994,000
Subsequent cost capitalized	[1]	1,251,000
Gross carrying amount of Land		1,371,000
Gross carrying amount of building and improvements		7,245,000
SEC Schedule III, Real Estate, Gross, Total		8,616,000
Accumulated Depreciation		$ 2,668,000
Elmhurst Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1961
Elmhurst Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1983
Fairview Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Gross Leasable Area | property		52,964
Initial cost to the Company, Land		$ 858,000
Initial cost to the Company, Building and Improvements		3,568,000
Subsequent cost capitalized	[1]	452,000
Gross carrying amount of Land		858,000
Gross carrying amount of building and improvements		4,020,000
SEC Schedule III, Real Estate, Gross, Total		4,878,000
Accumulated Depreciation		$ 1,470,000
Fairview Commons [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1976
Fairview Commons [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2003
Fieldstone Marketplace [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned		100.00%
Gross Leasable Area | property		150,123
Initial cost to the Company, Land		$ 5,229,000
Initial cost to the Company, Building and Improvements		21,440,000
Subsequent cost capitalized	[1]	3,386,000
Gross carrying amount of Land		5,167,000
Gross carrying amount of building and improvements		24,888,000
SEC Schedule III, Real Estate, Gross, Total		30,055,000
Accumulated Depreciation		$ 10,740,000
Fieldstone Marketplace [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Year built/Year last renovated		1988
Fieldstone Marketplace [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2012
Year built/Year last renovated		2003
Fishtown Crossing [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2001
Percent Owned		100.00%
Year built/Year last renovated		1988
Gross Leasable Area | property		127,265
Initial cost to the Company, Land		$ 2,942,000
Initial cost to the Company, Building and Improvements		11,769,000
Subsequent cost capitalized	[1]	9,676,000
Gross carrying amount of Land		2,843,000
Gross carrying amount of building and improvements		21,544,000
SEC Schedule III, Real Estate, Gross, Total		24,387,000
Accumulated Depreciation		$ 5,417,000
Franklin Village Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned	[3]	100.00%
Gross Leasable Area | property	[3]	305,937
Initial cost to the Company, Land	[3]	$ 14,270,000
Initial cost to the Company, Building and Improvements	[3]	61,915,000
Subsequent cost capitalized	[1],[3]	6,494,000
Gross carrying amount of Land	[3]	14,681,000
Gross carrying amount of building and improvements	[3]	67,998,000
SEC Schedule III, Real Estate, Gross, Total	[3]	82,679,000
Accumulated Depreciation	[3]	$ 19,215,000
Franklin Village Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	[3]	2004
Year built/Year last renovated	[3]	1987
Franklin Village Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	[3]	2012
Year built/Year last renovated	[3]	2005
General Booth Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Year built/Year last renovated		1985
Gross Leasable Area | property		71,639
Initial cost to the Company, Land		$ 1,935,000
Initial cost to the Company, Building and Improvements		9,493,000
Subsequent cost capitalized	[1]	(132,000)
Gross carrying amount of Land		1,935,000
Gross carrying amount of building and improvements		9,361,000
SEC Schedule III, Real Estate, Gross, Total		11,296,000
Accumulated Depreciation		$ 3,522,000
Girard Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2019
Percent Owned		100.00%
Gross Leasable Area | property		35,688
Initial cost to the Company, Land		$ 4,685,000
Initial cost to the Company, Building and Improvements		4,648,000
Subsequent cost capitalized	[1]	52,000
Gross carrying amount of Land		4,685,000
Gross carrying amount of building and improvements		4,700,000
SEC Schedule III, Real Estate, Gross, Total		9,385,000
Accumulated Depreciation		$ 405,000
Girard Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1950
Girard Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2010
Gold Star Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2006
Percent Owned		100.00%
Year built/Year last renovated		1988
Gross Leasable Area | property		71,720
Initial cost to the Company, Land		$ 1,644,000
Initial cost to the Company, Building and Improvements		6,519,000
Subsequent cost capitalized	[1]	755,000
Gross carrying amount of Land		1,644,000
Gross carrying amount of building and improvements		7,274,000
SEC Schedule III, Real Estate, Gross, Total		8,918,000
Accumulated Depreciation		$ 3,409,000
Golden Triangle [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Gross Leasable Area | property		202,790
Initial cost to the Company, Land		$ 2,320,000
Initial cost to the Company, Building and Improvements		9,713,000
Subsequent cost capitalized	[1]	12,824,000
Gross carrying amount of Land		2,320,000
Gross carrying amount of building and improvements		22,537,000
SEC Schedule III, Real Estate, Gross, Total		24,857,000
Accumulated Depreciation		$ 10,288,000
Golden Triangle [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1960
Golden Triangle [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2005
Groton Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Year built/Year last renovated		1969
Gross Leasable Area | property		130,264
Initial cost to the Company, Land		$ 3,070,000
Initial cost to the Company, Building and Improvements		12,320,000
Subsequent cost capitalized	[1]	8,552,000
Gross carrying amount of Land		3,113,000
Gross carrying amount of building and improvements		20,829,000
SEC Schedule III, Real Estate, Gross, Total		23,942,000
Accumulated Depreciation		$ 6,453,000
Halifax Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Year built/Year last renovated		1994
Gross Leasable Area | property		51,510
Initial cost to the Company, Land		$ 1,412,000
Initial cost to the Company, Building and Improvements		5,799,000
Subsequent cost capitalized	[1]	562,000
Gross carrying amount of Land		1,347,000
Gross carrying amount of building and improvements		6,426,000
SEC Schedule III, Real Estate, Gross, Total		7,773,000
Accumulated Depreciation		$ 3,059,000
Hamburg Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2004
Percent Owned		100.00%
Gross Leasable Area | property		102,058
Initial cost to the Company, Land		$ 1,153,000
Initial cost to the Company, Building and Improvements		4,678,000
Subsequent cost capitalized	[1]	6,332,000
Gross carrying amount of Land		1,153,000
Gross carrying amount of building and improvements		11,010,000
SEC Schedule III, Real Estate, Gross, Total		12,163,000
Accumulated Depreciation		$ 4,210,000
Hamburg Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1993
Hamburg Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2010
Jordan Lane [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Gross Leasable Area | property		177,504
Initial cost to the Company, Land		$ 4,291,000
Initial cost to the Company, Building and Improvements		21,176,000
Subsequent cost capitalized	[1]	1,122,000
Gross carrying amount of Land		4,291,000
Gross carrying amount of building and improvements		22,298,000
SEC Schedule III, Real Estate, Gross, Total		26,589,000
Accumulated Depreciation		$ 8,744,000
Jordan Lane [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1969
Jordan Lane [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1991
Kempsville Crossing [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Gross Leasable Area | property		79,512
Initial cost to the Company, Land		$ 2,207,000
Initial cost to the Company, Building and Improvements		11,000,000
Subsequent cost capitalized	[1]	(2,754,000)
Gross carrying amount of Land		2,207,000
Gross carrying amount of building and improvements		8,246,000
SEC Schedule III, Real Estate, Gross, Total		10,453,000
Accumulated Depreciation		$ 3,399,000
Kempsville Crossing [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1985
Kempsville Crossing [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2013
Kings Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Gross Leasable Area | property		168,243
Initial cost to the Company, Land		$ 2,413,000
Initial cost to the Company, Building and Improvements		12,604,000
Subsequent cost capitalized	[1]	1,684,000
Gross carrying amount of Land		2,408,000
Gross carrying amount of building and improvements		14,293,000
SEC Schedule III, Real Estate, Gross, Total		16,701,000
Accumulated Depreciation		$ 4,489,000
Kings Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1970
Kings Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1994
Lawndale Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2015
Percent Owned		100.00%
Year built/Year last renovated		1998
Gross Leasable Area | property		92,773
Initial cost to the Company, Land		$ 3,635,000
Initial cost to the Company, Building and Improvements		21,854,000
Subsequent cost capitalized	[1]	1,091,000
Gross carrying amount of Land		3,635,000
Gross carrying amount of building and improvements		22,945,000
SEC Schedule III, Real Estate, Gross, Total		26,580,000
Accumulated Depreciation		$ 4,783,000
Meadows Marketplace [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned		100.00%
Year built/Year last renovated		2005
Gross Leasable Area | property		91,518
Initial cost to the Company, Land		$ 1,914,000
Subsequent cost capitalized	[1]	11,959,000
Gross carrying amount of Land		1,914,000
Gross carrying amount of building and improvements		11,959,000
SEC Schedule III, Real Estate, Gross, Total		13,873,000
Accumulated Depreciation		$ 4,324,000
Meadows Marketplace [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2004
Meadows Marketplace [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2012
Newport Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Year built/Year last renovated		1996
Gross Leasable Area | property		64,489
Initial cost to the Company, Land		$ 1,721,000
Initial cost to the Company, Building and Improvements		7,758,000
Subsequent cost capitalized	[1]	586,000
Gross carrying amount of Land		1,682,000
Gross carrying amount of building and improvements		8,383,000
SEC Schedule III, Real Estate, Gross, Total		10,065,000
Accumulated Depreciation		$ 3,948,000
New London Mall [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2009
Percent Owned		100.00%
Gross Leasable Area | property		259,566
Initial cost to the Company, Land		$ 14,891,000
Initial cost to the Company, Building and Improvements		24,967,000
Subsequent cost capitalized	[1]	4,797,000
Gross carrying amount of Land		8,807,000
Gross carrying amount of building and improvements		35,848,000
SEC Schedule III, Real Estate, Gross, Total		44,655,000
Accumulated Depreciation		$ 15,186,000
New London Mall [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1967
New London Mall [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1997
Northside Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2008
Percent Owned		100.00%
Year built/Year last renovated		2009
Gross Leasable Area | property		69,136
Initial cost to the Company, Land		$ 3,332,000
Subsequent cost capitalized	[1]	10,108,000
Gross carrying amount of Land		3,379,000
Gross carrying amount of building and improvements		10,061,000
SEC Schedule III, Real Estate, Gross, Total		13,440,000
Accumulated Depreciation		$ 2,863,000
Norwood Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2006
Percent Owned		100.00%
Gross Leasable Area | property		87,406
Initial cost to the Company, Land		$ 1,874,000
Initial cost to the Company, Building and Improvements		8,453,000
Subsequent cost capitalized	[1]	1,017,000
Gross carrying amount of Land		1,874,000
Gross carrying amount of building and improvements		9,470,000
SEC Schedule III, Real Estate, Gross, Total		11,344,000
Accumulated Depreciation		$ 3,447,000
Norwood Shopping Center [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1965
Norwood Shopping Center [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2013
Oak Ridge Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2006
Percent Owned		100.00%
Year built/Year last renovated		2000
Gross Leasable Area | property		38,700
Initial cost to the Company, Land		$ 960,000
Initial cost to the Company, Building and Improvements		4,254,000
Subsequent cost capitalized	[1]	471,000
Gross carrying amount of Land		960,000
Gross carrying amount of building and improvements		4,725,000
SEC Schedule III, Real Estate, Gross, Total		5,685,000
Accumulated Depreciation		$ 1,878,000
Oakland Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Gross Leasable Area | property		90,100
Initial cost to the Company, Land		$ 2,504,000
Initial cost to the Company, Building and Improvements		15,662,000
Subsequent cost capitalized	[1]	(344,000)
Gross carrying amount of Land		2,504,000
Gross carrying amount of building and improvements		15,318,000
SEC Schedule III, Real Estate, Gross, Total		17,822,000
Accumulated Depreciation		$ 5,904,000
Oakland Commons [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1962
Oakland Commons [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2013
Oakland Mills [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Gross Leasable Area | property		57,008
Initial cost to the Company, Land		$ 1,611,000
Initial cost to the Company, Building and Improvements		6,292,000
Subsequent cost capitalized	[1]	1,088,000
Gross carrying amount of Land		1,530,000
Gross carrying amount of building and improvements		7,461,000
SEC Schedule III, Real Estate, Gross, Total		8,991,000
Accumulated Depreciation		$ 3,088,000
Oakland Mills [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1960
Oakland Mills [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2004
Palmyra Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Gross Leasable Area | property		111,051
Initial cost to the Company, Land		$ 1,488,000
Initial cost to the Company, Building and Improvements		6,566,000
Subsequent cost capitalized	[1]	2,082,000
Gross carrying amount of Land		1,488,000
Gross carrying amount of building and improvements		8,648,000
SEC Schedule III, Real Estate, Gross, Total		10,136,000
Accumulated Depreciation		$ 3,731,000
Palmyra Shopping Center [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1960
Palmyra Shopping Center [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2012
Pine Grove Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Gross Leasable Area | property		79,306
Initial cost to the Company, Land		$ 2,010,000
Initial cost to the Company, Building and Improvements		6,489,000
Subsequent cost capitalized	[1]	579,000
Gross carrying amount of Land		1,622,000
Gross carrying amount of building and improvements		7,456,000
SEC Schedule III, Real Estate, Gross, Total		9,078,000
Accumulated Depreciation		$ 3,386,000
Pine Grove Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2001
Pine Grove Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2002
Quartermaster Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2014
Percent Owned		100.00%
Year built/Year last renovated		2004
Gross Leasable Area | property		456,602
Initial cost to the Company, Land		$ 37,031,000
Initial cost to the Company, Building and Improvements		54,210,000
Subsequent cost capitalized	[1]	3,548,000
Gross carrying amount of Land		37,031,000
Gross carrying amount of building and improvements		57,758,000
SEC Schedule III, Real Estate, Gross, Total		94,789,000
Accumulated Depreciation		$ 13,019,000
River View Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Gross Leasable Area | property		113,922
Initial cost to the Company, Land		$ 9,718,000
Initial cost to the Company, Building and Improvements		40,356,000
Subsequent cost capitalized	[1]	9,598,000
Gross carrying amount of Land		10,872,000
Gross carrying amount of building and improvements		48,800,000
SEC Schedule III, Real Estate, Gross, Total		59,672,000
Accumulated Depreciation		$ 20,002,000
River View Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1991
River View Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1998
San Souci Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2009
Percent Owned		40.00%
Gross Leasable Area | property		264,134
Initial cost to the Company, Land		$ 14,849,000
Initial cost to the Company, Building and Improvements		18,445,000
Subsequent cost capitalized	[1]	5,182,000
Gross carrying amount of Land		13,406,000
Gross carrying amount of building and improvements		25,070,000
SEC Schedule III, Real Estate, Gross, Total		38,476,000
Accumulated Depreciation		$ 13,092,000
San Souci Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1985
San Souci Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1997
Senator Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2018
Percent Owned		100.00%
Gross Leasable Area | property		42,941
Initial cost to the Company, Building and Improvements		$ 5,327,000
Subsequent cost capitalized	[1]	2,485,000
Gross carrying amount of building and improvements		7,812,000
SEC Schedule III, Real Estate, Gross, Total		7,812,000
Accumulated Depreciation		$ 1,145,000
Senator Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1946
Senator Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2005
Shoppes at Arts District [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2016
Percent Owned		100.00%
Year built/Year last renovated		2011
Gross Leasable Area | property		35,676
Initial cost to the Company, Land		$ 2,247,000
Initial cost to the Company, Building and Improvements		18,616,000
Subsequent cost capitalized	[1]	75,000
Gross carrying amount of Land		2,247,000
Gross carrying amount of building and improvements		18,691,000
SEC Schedule III, Real Estate, Gross, Total		20,938,000
Accumulated Depreciation		$ 3,338,000
South Philadelphia [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Gross Leasable Area | property		193,085
Initial cost to the Company, Land		$ 8,222,000
Initial cost to the Company, Building and Improvements		36,314,000
Subsequent cost capitalized	[1]	17,210,000
Gross carrying amount of Land		10,363,000
Gross carrying amount of building and improvements		51,383,000
SEC Schedule III, Real Estate, Gross, Total		61,746,000
Accumulated Depreciation		$ 23,388,000
South Philadelphia [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1950
South Philadelphia [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2003
Southington Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Gross Leasable Area | property		155,842
Initial cost to the Company, Building and Improvements		$ 11,834,000
Subsequent cost capitalized	[1]	1,704,000
Gross carrying amount of building and improvements		13,538,000
SEC Schedule III, Real Estate, Gross, Total		13,538,000
Accumulated Depreciation		$ 5,429,000
Southington Center [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1972
Southington Center [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2000
Swede Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Gross Leasable Area | property		100,809
Initial cost to the Company, Land		$ 2,268,000
Initial cost to the Company, Building and Improvements		6,232,000
Subsequent cost capitalized	[1]	8,254,000
Gross carrying amount of Land		2,272,000
Gross carrying amount of building and improvements		14,482,000
SEC Schedule III, Real Estate, Gross, Total		16,754,000
Accumulated Depreciation		$ 6,309,000
Swede Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1980
Swede Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2012
The Brickyard [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2004
Percent Owned		100.00%
Gross Leasable Area | property		227,598
Initial cost to the Company, Land		$ 7,632,000
Initial cost to the Company, Building and Improvements		29,308,000
Subsequent cost capitalized	[1]	4,821,000
Gross carrying amount of Land		7,648,000
Gross carrying amount of building and improvements		34,113,000
SEC Schedule III, Real Estate, Gross, Total		41,761,000
Accumulated Depreciation		$ 12,923,000
The Brickyard [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1990
The Brickyard [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2012
The Point [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2000
Percent Owned		100.00%
Gross Leasable Area | property		262,072
Initial cost to the Company, Land		$ 2,700,000
Initial cost to the Company, Building and Improvements		10,800,000
Subsequent cost capitalized	[1]	19,534,000
Gross carrying amount of Land		2,996,000
Gross carrying amount of building and improvements		30,038,000
SEC Schedule III, Real Estate, Gross, Total		33,034,000
Accumulated Depreciation		$ 13,507,000
The Point [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1972
The Point [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2012
The Shops at Bloomfield Station [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2016
Percent Owned		100.00%
Year built/Year last renovated		2015
Gross Leasable Area | property		63,844
Initial cost to the Company, Land		$ 625,000
Initial cost to the Company, Building and Improvements		17,674,000
Subsequent cost capitalized	[1]	393,000
Gross carrying amount of Land		625,000
Gross carrying amount of building and improvements		18,067,000
SEC Schedule III, Real Estate, Gross, Total		18,692,000
Accumulated Depreciation		$ 3,097,000
The Shops at Suffolk Downs [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Gross Leasable Area | property		121,187
Initial cost to the Company, Land		$ 7,580,000
Initial cost to the Company, Building and Improvements		11,089,000
Subsequent cost capitalized	[1]	10,547,000
Gross carrying amount of Land		7,580,000
Gross carrying amount of building and improvements		21,636,000
SEC Schedule III, Real Estate, Gross, Total		29,216,000
Accumulated Depreciation		$ 7,942,000
The Shops at Suffolk Downs [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2005
The Shops at Suffolk Downs [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2011
Timpany Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Gross Leasable Area | property		182,799
Initial cost to the Company, Land		$ 3,412,000
Initial cost to the Company, Building and Improvements		19,240,000
Subsequent cost capitalized	[1]	2,366,000
Gross carrying amount of Land		3,368,000
Gross carrying amount of building and improvements		21,650,000
SEC Schedule III, Real Estate, Gross, Total		25,018,000
Accumulated Depreciation		$ 7,006,000
Timpany Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1970
Timpany Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1989
Trexler Mall [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2005
Percent Owned		100.00%
Gross Leasable Area | property		336,687
Initial cost to the Company, Land		$ 6,932,000
Initial cost to the Company, Building and Improvements		32,815,000
Subsequent cost capitalized	[1]	13,691,000
Gross carrying amount of Land		6,932,000
Gross carrying amount of building and improvements		46,506,000
SEC Schedule III, Real Estate, Gross, Total		53,438,000
Accumulated Depreciation		$ 16,945,000
Trexler Mall [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1973
Trexler Mall [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2013
Trexlertown Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2006
Percent Owned		100.00%
Gross Leasable Area | property		325,171
Initial cost to the Company, Land		$ 13,349,000
Initial cost to the Company, Building and Improvements		23,867,000
Subsequent cost capitalized	[1]	31,032,000
Gross carrying amount of Land		15,674,000
Gross carrying amount of building and improvements		52,574,000
SEC Schedule III, Real Estate, Gross, Total		68,248,000
Accumulated Depreciation		$ 14,866,000
Trexlertown Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1990
Trexlertown Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2011
Valley Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2003
Percent Owned		100.00%
Gross Leasable Area | property		190,939
Initial cost to the Company, Land		$ 1,950,000
Initial cost to the Company, Building and Improvements		7,766,000
Subsequent cost capitalized	[1]	1,903,000
Gross carrying amount of Land		1,950,000
Gross carrying amount of building and improvements		9,669,000
SEC Schedule III, Real Estate, Gross, Total		11,619,000
Accumulated Depreciation		$ 4,490,000
Valley Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1975
Valley Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1994
Washington Center Shoppes [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2001
Percent Owned		100.00%
Gross Leasable Area | property		157,300
Initial cost to the Company, Land		$ 2,061,000
Initial cost to the Company, Building and Improvements		7,314,000
Subsequent cost capitalized	[1]	6,891,000
Gross carrying amount of Land		2,000,000
Gross carrying amount of building and improvements		14,266,000
SEC Schedule III, Real Estate, Gross, Total		16,266,000
Accumulated Depreciation		$ 6,315,000
Washington Center Shoppes [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1979
Washington Center Shoppes [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1995
Webster Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Gross Leasable Area | property		98,984
Initial cost to the Company, Land		$ 3,551,000
Initial cost to the Company, Building and Improvements		18,412,000
Subsequent cost capitalized	[1]	4,035,000
Gross carrying amount of Land		4,082,000
Gross carrying amount of building and improvements		21,916,000
SEC Schedule III, Real Estate, Gross, Total		25,998,000
Accumulated Depreciation		$ 7,353,000
Webster Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1960
Webster Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2004
Yorktowne Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired		2007
Percent Owned		100.00%
Gross Leasable Area | property		136,197
Initial cost to the Company, Land		$ 5,940,000
Initial cost to the Company, Building and Improvements		25,505,000
Subsequent cost capitalized	[1]	2,560,000
Gross carrying amount of Land		5,801,000
Gross carrying amount of building and improvements		28,204,000
SEC Schedule III, Real Estate, Gross, Total		34,005,000
Accumulated Depreciation		$ 10,323,000
Yorktowne Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		1970
Yorktowne Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated		2000
Other [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned		100.00%
Initial cost to the Company, Land		$ 1,965,000
Subsequent cost capitalized	[1]	1,525,000
Gross carrying amount of Land		878,000
Gross carrying amount of building and improvements		2,612,000
SEC Schedule III, Real Estate, Gross, Total		3,490,000
Accumulated Depreciation		$ 332,000
[1]	Negative amounts represent write-offs of fully depreciated assets.
[2]	At December 31, 2020, the aggregate cost for federal income tax purposes was approximately $25.6 million greater than the Company's recorded values.
[3]	Amount of encumbrance totals $45.6 million at December 31, 2020.

Schedule III - Real Estate an_3

Schedule III - Real Estate and Accumulated Depreciation (Changes in Real Estate and Accumulated Depreciation) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018
Real estate balance, beginning of the year		$ 1,515,206,000		$ 1,508,682,000	$ 1,534,599,000
Properties transferred to held for sale		(22,512,000)		(36,265,000)	(61,505,000)
Property acquisitions				9,333,000	6,481,000
Outparcel dispositions		(840,000)
Improvements and betterments		35,624,000		37,089,000	29,107,000
Asset write-offs				(3,633,000)
Real estate balance, end of the year		1,527,478,000	[1]	1,515,206,000	1,508,682,000
Accumulated depreciation balance, beginning of the year		389,861,000		361,969,000	341,943,000
Properties transferred to held for sale		(3,947,000)		(10,143,000)	(14,886,000)
Outparcel dispositions		(90,000)
Depreciation expense	[2]	42,745,000		41,142,000	34,912,000
Asset write-offs				(3,107,000)
Accumulated depreciation balance end of the year		428,569,000		389,861,000	361,969,000
Net book value		1,098,909,000		$ 1,125,345,000	$ 1,146,713,000
Amount of encumbrance		45,600,000
Difference between recorded cost of real estate and cost for federal tax purposes		$ 25,600,000
Minimum [Member]
Estimated useful life of buildings and improvements		3 years
Maximum [Member]
Estimated useful life of buildings and improvements		40 years
[1]	At December 31, 2020, the aggregate cost for federal income tax purposes was approximately $25.6 million greater than the Company's recorded values.
[2]	Depreciation is provided over the estimated useful lives of the buildings and improvements, which range from 3 to 40 years.