Business and Organization (Details)	12 Months Ended
	Dec. 31, 2020 property shares
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Number of properties | property	54
OP units outstanding | shares	81,000
Cedar Realty Trust Partnership L.P [Member]
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Company's interest in Operating Partnership	99.40%
Limited partners' interest in Operating Partnership	0.60%