Consolidated Statements of Comprehensive (Loss) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 1,253,000	$ (2,098,000)
Unrealized gain (loss) on change in fair value of cash flow hedges	4,197,000	(15,014,000)
Comprehensive income (loss)	5,450,000	(17,112,000)
Comprehensive (income) attributable to noncontrolling interests	(167,000)	(58,000)
Comprehensive income (loss) attributable to Cedar Realty Trust, Inc.	$ 5,283,000	$ (17,170,000)