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