Earnings Per Share (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net income	$ 64,467	$ 48,059	$ 119,195	$ 97,798
Less: Preferred share dividends	(2,008)	(2,011)	(4,018)	(4,021)
Less: Income from operations attributable to noncontrolling interests	(2,791)	(1,855)	(5,535)	(3,358)
Less: Earnings allocated to unvested shares	(300)	(298)	(607)	(592)
Net income available for common shareholders, basic and diluted	$ 59,368	$ 43,895	$ 109,035	$ 89,827
Weighted average common shares outstanding, basic	79,202	77,474	78,826	77,160
Open forward contracts for share issuances	0	31	29	2
Weighted average common shares outstanding, diluted	79,202	77,505	78,855	77,162
EARNINGS PER COMMON SHARE, BASIC AND DILUTED:
Net income available for common shareholds	$ 0.75	$ 0.57	$ 1.38	$ 1.16
Federal Realty OP LP
Net income	$ 64,467	$ 48,059	$ 119,195	$ 97,798
Less: Preferred unit distributions	(2,008)	(2,011)	(4,018)	(4,021)
Less: Income from operations attributable to noncontrolling interests	(2,791)	(1,855)	(5,535)	(3,358)
Less: Earnings allocated to unvested units	(300)	(298)	(607)	(592)
Net income available to common unit holders, basic and diluted	$ 59,368	$ 43,895	$ 109,035	$ 89,827
Weighted average common units outstanding, basic	79,202	77,474	78,826	77,160
Common unit issuances relating to open common share forward contracts	0	31	29	2
Weighted average common units outstanding, diluted	79,202	77,505	78,855	77,162
EARNINGS PER COMMON UNIT, BASIC AND DILUTED:
Net income available for common shareholders	$ 0.75	$ 0.57	$ 1.38	$ 1.16