Consolidated Statements of Comprehensive Income (Loss) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 2,989,000	$ (16,620,000)
Other comprehensive income - unrealized (loss) gain on change in fair value of cash flow hedges	(5,442,000)	5,890,000
Comprehensive (loss)	(2,453,000)	(10,730,000)
Comprehensive (income) attributable to noncontrolling interests	(74,000)	(70,000)
Comprehensive (loss) attributable to Cedar Realty Trust, Inc.	$ (2,527,000)	$ (10,800,000)