Earnings Per Share And Unit (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net income	$ 63,004	$ 64,467	$ 120,735	$ 119,195
Less: Preferred share dividends	(2,008)	(2,008)	(4,016)	(4,018)
Less: Income from operations attributable to noncontrolling interests	(2,505)	(2,791)	(4,901)	(5,535)
Less: Earnings allocated to unvested shares	(324)	(300)	(651)	(607)
Net income available for common shareholders, basic and diluted	$ 58,167	$ 59,368	$ 111,167	$ 109,035
Weighted average common shares outstanding, basic	81,214	79,202	81,178	78,826
Open forward contracts for share issuances	0	0	0	29
Weighted average common shares outstanding, diluted	81,214	79,202	81,178	78,855
EARNINGS PER COMMON SHARE, BASIC AND DILUTED:
Net income available for common shareholders	$ 0.72	$ 0.75	$ 1.37	$ 1.38
Federal Realty OP LP
Net income	$ 63,004	$ 64,467	$ 120,735	$ 119,195
Less: Preferred unit distributions	(2,008)	(2,008)	(4,016)	(4,018)
Less: Income from operations attributable to noncontrolling interests	(2,505)	(2,791)	(4,901)	(5,535)
Less: Earnings allocated to unvested units	(324)	(300)	(651)	(607)
Net income available to common unit holders, basic and diluted	$ 58,167	$ 59,368	$ 111,167	$ 109,035
Weighted average common units outstanding, basic	81,214	79,202	81,178	78,826
Common unit issuances relating to open common share forward contracts	0	0	0	29
Weighted average common units outstanding, diluted	81,214	79,202	81,178	78,855
EARNINGS PER COMMON UNIT, BASIC AND DILUTED:
Net income available for common unit holders	$ 0.72	$ 0.75	$ 1.37	$ 1.38