Consolidated Statements Of Comprehensive (Loss) Income - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (16,620,000)	$ 11,945,000
Other comprehensive income - unrealized gain on change in fair value of cash flow hedges	5,890,000	1,340,000
Comprehensive (loss) income	(10,730,000)	13,285,000
Comprehensive (income) attributable to noncontrolling interests	(70,000)	(174,000)
Comprehensive (loss) income attributable to Cedar Realty Trust, Inc.	$ (10,800,000)	$ 13,111,000