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 [Member]	Accumulated Other Comprehensive Income [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, 2018	$ 558,716,000	$ 3,403,000	$ 558,201,000	$ 3,403,000		$ 159,541,000	$ 159,541,000	$ 5,426,000	$ 5,426,000	$ (16,572,000)	$ (16,572,000)	$ 875,565,000	$ 875,565,000	$ (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	90,436,000	90,436,000
Net (loss) income	2,989,000	2,000												2,882,000					2,882,000			105,000		107,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(5,442,000)	(33,000)															(5,409,000)		(5,409,000)					(33,000)
Share-based compensation, net	753,000							$ 39,000		22,000		692,000							753,000
Share-based compensation, net, shares								650,000
Common stock sales, net of issuance expenses	5,000											5,000							5,000
Common stock sales, net of issuance expenses, shares								1,000
Common stock repurchases	(6,844,000)							$ (123,000)				(6,721,000)							(6,844,000)
Common stock repurchases. Shares								(2,050,000)
Preferred stock dividends	(2,688,000)													(2,688,000)					(2,688,000)
Distributions to common shareholders/noncontrolling interests	(4,483,000)	(28,000)												(4,455,000)					(4,455,000)					(28,000)
Reallocation adjustment of limited partners' interest		12,000										(12,000)							(12,000)					12,000
Balance at Mar. 31, 2019	542,491,000	3,356,000				$ 159,541,000		$ 5,342,000		(16,550,000)		869,529,000		(480,502,000)			1,782,000		539,142,000			(7,000)		3,349,000
Balance, shares at Mar. 31, 2019						6,450,000		89,037,000
Balance at Dec. 31, 2018	558,716,000	3,403,000	$ 558,201,000	$ 3,403,000		$ 159,541,000	$ 159,541,000	$ 5,426,000	$ 5,426,000	(16,572,000)	$ (16,572,000)	875,565,000	$ 875,565,000	(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	90,436,000	90,436,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(17,137,000)
Balance at Sep. 30, 2019	527,175,000	3,158,000				$ 159,541,000		$ 5,341,000		(16,391,000)		871,682,000		(486,617,000)			(9,842,000)		523,714,000			303,000		3,461,000
Balance, shares at Sep. 30, 2019						6,450,000		89,021,000
Prior period adjustment - adoption of lease accounting standard | Accounting Standards Update 2016-02 [Member]					$ (515,000)											$ (515,000)					$ (515,000)
Balance at Mar. 31, 2019	542,491,000	3,356,000				$ 159,541,000		$ 5,342,000		(16,550,000)		869,529,000		(480,502,000)			1,782,000		539,142,000			(7,000)		3,349,000
Balance, shares at Mar. 31, 2019						6,450,000		89,037,000
Net (loss) income	5,544,000	17,000												5,383,000					5,383,000			144,000		161,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(8,596,000)	(53,000)															(8,543,000)		(8,543,000)					(53,000)
Share-based compensation, net	1,132,000							$ (1,000)		80,000		1,053,000							1,132,000
Share-based compensation, net, shares								(13,000)
Common stock sales, net of issuance expenses	3,000											3,000							3,000
Common stock sales, net of issuance expenses, shares								1,000
Preferred stock dividends	(2,688,000)													(2,688,000)					(2,688,000)
Distributions to common shareholders/noncontrolling interests	(4,479,000)	(28,000)												(4,451,000)					(4,451,000)					(28,000)
Reallocation adjustment of limited partners' interest		3,000										(3,000)							(3,000)					3,000
Balance at Jun. 30, 2019	533,407,000	3,295,000				$ 159,541,000		$ 5,341,000		(16,470,000)		870,582,000		(482,258,000)			(6,761,000)		529,975,000			137,000		3,432,000
Balance, shares at Jun. 30, 2019						6,450,000		89,025,000
Net (loss) income	2,947,000	1,000												2,780,000					2,780,000			166,000		167,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(3,099,000)	(18,000)															(3,081,000)		(3,081,000)					(18,000)
Share-based compensation, net	1,120,000									79,000		1,041,000							1,120,000
Share-based compensation, net, shares								(9,000)
Common stock sales, net of issuance expenses	10,000											10,000							10,000
Common stock sales, net of issuance expenses, shares								5,000
Preferred stock dividends	(2,688,000)													(2,688,000)					(2,688,000)
Distributions to common shareholders/noncontrolling interests	(4,479,000)	(28,000)												(4,451,000)					(4,451,000)					(28,000)
Redemption of OP Units	(43,000)	(43,000)																						(43,000)
Reallocation adjustment of limited partners' interest		(49,000)										49,000							49,000					(49,000)
Balance at Sep. 30, 2019	527,175,000	3,158,000				$ 159,541,000		$ 5,341,000		(16,391,000)		871,682,000		(486,617,000)			(9,842,000)		523,714,000			303,000		3,461,000
Balance, shares at Sep. 30, 2019						6,450,000		89,021,000
Balance at Dec. 31, 2019	514,075,000	3,079,000				$ 159,541,000		$ 5,341,000		(16,311,000)		872,724,000		(503,725,000)			(7,009,000)		510,561,000			435,000		3,514,000
Balance, shares at Dec. 31, 2019						6,450,000		89,020,000
Net (loss) income	(2,098,000)	(28,000)												(2,246,000)					(2,246,000)			176,000		148,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(15,014,000)	(90,000)															(14,924,000)		(14,924,000)					(90,000)
Share-based compensation, net	866,000							$ 19,000		1,006,000		(159,000)							866,000
Share-based compensation, net, shares								305,000
Common stock sales, net of issuance expenses	5,000											5,000							5,000
Common stock sales, net of issuance expenses, shares								2,000
Preferred stock dividends	(2,688,000)													(2,688,000)					(2,688,000)
Distributions to common shareholders/noncontrolling interests	(4,495,000)	(27,000)												(4,468,000)					(4,468,000)					(27,000)
Reallocation adjustment of limited partners' interest		(5,000)										5,000							5,000					(5,000)
Balance at Mar. 31, 2020	490,651,000	2,929,000				$ 159,541,000		$ 5,360,000		(15,305,000)		872,575,000		(513,127,000)			(21,933,000)		487,111,000			611,000		3,540,000
Balance, shares at Mar. 31, 2020						6,450,000		89,327,000
Balance at Dec. 31, 2019	514,075,000	3,079,000				$ 159,541,000		$ 5,341,000		(16,311,000)		872,724,000		(503,725,000)			(7,009,000)		510,561,000			435,000		3,514,000
Balance, shares at Dec. 31, 2019						6,450,000		89,020,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(14,122,000)
Balance at Sep. 30, 2020	481,610,000	2,873,000				$ 159,541,000		$ 5,359,000		(15,191,000)		874,299,000		(525,119,000)			(21,047,000)		477,842,000			895,000		3,768,000
Balance, shares at Sep. 30, 2020						6,450,000		89,311,000
Balance at Mar. 31, 2020	490,651,000	2,929,000				$ 159,541,000		$ 5,360,000		(15,305,000)		872,575,000		(513,127,000)			(21,933,000)		487,111,000			611,000		3,540,000
Balance, shares at Mar. 31, 2020						6,450,000		89,327,000
Net (loss) income	(6,009,000)	(52,000)												(6,097,000)					(6,097,000)			140,000		88,000
Unrealized gain (loss) on change in fair value of cash flow hedges	(588,000)	(3,000)															(585,000)		(585,000)					(3,000)
Share-based compensation, net	1,030,000									57,000		973,000							1,030,000
Common stock sales, net of issuance expenses	4,000											4,000							4,000
Common stock sales, net of issuance expenses, shares								3,000
Preferred stock dividends	(2,688,000)													(2,688,000)					(2,688,000)
Distributions to common shareholders/noncontrolling interests	(898,000)	(5,000)												(893,000)					(893,000)					(5,000)
Reallocation adjustment of limited partners' interest		2,000										(2,000)							(2,000)					2,000
Balance at Jun. 30, 2020	481,502,000	2,871,000				$ 159,541,000		$ 5,360,000		(15,248,000)		873,550,000		(522,805,000)			(22,518,000)		477,880,000			751,000		3,622,000
Balance, shares at Jun. 30, 2020						6,450,000		89,330,000
Net (loss) income	1,404,000	(7,000)												1,267,000					1,267,000			144,000		137,000
Unrealized gain (loss) on change in fair value of cash flow hedges	1,480,000	9,000															1,471,000		1,471,000					9,000
Share-based compensation, net	808,000							$ (1,000)		57,000		752,000							808,000
Share-based compensation, net, shares								(22,000)
Common stock sales, net of issuance expenses	2,000											2,000							2,000
Common stock sales, net of issuance expenses, shares								3,000
Preferred stock dividends	(2,688,000)													(2,688,000)					(2,688,000)
Distributions to common shareholders/noncontrolling interests	(898,000)	(5,000)												(893,000)					(893,000)					(5,000)
Reallocation adjustment of limited partners' interest		5,000										(5,000)							(5,000)					5,000
Balance at Sep. 30, 2020	$ 481,610,000	$ 2,873,000				$ 159,541,000		$ 5,359,000		$ (15,191,000)		$ 874,299,000		$ (525,119,000)			$ (21,047,000)		$ 477,842,000			$ 895,000		$ 3,768,000
Balance, shares at Sep. 30, 2020						6,450,000		89,311,000