Consolidated Statements of Comprehensive (Loss) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 1,404,000	$ 2,947,000	$ (6,703,000)	$ 11,480,000
Unrealized gain (loss) on change in fair value of cash flow hedges	1,480,000	(3,099,000)	(14,122,000)	(17,137,000)
Comprehensive income (loss)	2,884,000	(152,000)	(20,825,000)	(5,657,000)
Comprehensive (income) attributable to noncontrolling interests	(146,000)	(149,000)	(289,000)	(331,000)
Comprehensive income (loss) attributable to Cedar Realty Trust, Inc.	$ 2,738,000	$ (301,000)	$ (21,114,000)	$ (5,988,000)