Consolidated Statements of Capital - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Increase (Decrease) in Partners' Capital [Roll Forward]
Net Income (loss), excluding amounts attributable to redeemable noncontrolling Interests	$ 64,575	$ 56,446
Other comprehensive (loss) income - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(1,144)	2,847
Contributions from noncontrolling interests		725
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive (loss) income - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(1,144)	2,847
Federal Realty OP LP
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	3,244,144	3,042,159
Net Income (loss), excluding amounts attributable to redeemable noncontrolling Interests	64,575	56,446
Other comprehensive (loss) income - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(1,144)	2,847
Distributions declared to common unit holders	(94,875)	(90,479)
Distributions on preferred units	(2,008)	(2,008)
Distributions declared to noncontrolling interests in consolidated partnerships, excluding amounts attributable to redeemable noncontrolling interests	(869)	(798)
Common units issued as a result of common stock issued by Parent Company, net of issuance costs	54,494	6,377
Common units issued under dividend reinvestment plan	444	355
Share-based compensation expense, net of forfeitures	4,112	4,430
Common units withheld for employee taxes	(4,607)	(4,614)
Contributions from noncontrolling interests		725
Purchase of capped calls		(19,448)
Ending balance	3,264,266	2,995,992
Federal Realty OP LP \| Preferred Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	154,788	154,788
Net Income (loss), excluding amounts attributable to redeemable noncontrolling Interests	2,008	2,008
Distributions on preferred units	(2,008)	(2,008)
Ending balance	154,788	154,788
Federal Realty OP LP \| Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	3,012,066	2,804,669
Net Income (loss), excluding amounts attributable to redeemable noncontrolling Interests	61,760	54,728
Distributions declared to common unit holders	(94,875)	(90,479)
Common units issued as a result of common stock issued by Parent Company, net of issuance costs	54,494	6,377
Common units issued under dividend reinvestment plan	444	355
Share-based compensation expense, net of forfeitures	4,112	4,430
Common units withheld for employee taxes	(4,607)	(4,614)
Purchase of capped calls		(19,448)
Ending balance	3,033,497	2,756,384
Federal Realty OP LP \| Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	4,740	4,052
Other comprehensive (loss) income - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(1,144)	2,847
Ending balance	3,596	6,899
Federal Realty OP LP \| Total Partner Capital
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	3,171,594	2,963,509
Net Income (loss), excluding amounts attributable to redeemable noncontrolling Interests	63,768	56,736
Other comprehensive (loss) income - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(1,144)	2,847
Distributions declared to common unit holders	(94,875)	(90,479)
Distributions on preferred units	(2,008)	(2,008)
Common units issued as a result of common stock issued by Parent Company, net of issuance costs	54,494	6,377
Common units issued under dividend reinvestment plan	444	355
Share-based compensation expense, net of forfeitures	4,112	4,430
Common units withheld for employee taxes	(4,607)	(4,614)
Purchase of capped calls		(19,448)
Ending balance	3,191,881	2,918,071
Federal Realty OP LP \| Noncontrolling Interests in Consolidated Partnerships
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	72,550	78,650
Net Income (loss), excluding amounts attributable to redeemable noncontrolling Interests	807	(290)
Distributions declared to noncontrolling interests in consolidated partnerships, excluding amounts attributable to redeemable noncontrolling interests	(869)	(798)
Contributions from noncontrolling interests		725
Ending balance	72,385	77,921
Federal Realty OP LP \| downREIT OP units
Increase (Decrease) in Partners' Capital [Roll Forward]
Conversion and redemption of downREIT OP units	0	0
Federal Realty OP LP \| downREIT OP units \| Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Conversion and redemption of downREIT OP units	103	366
Federal Realty OP LP \| downREIT OP units \| Total Partner Capital
Increase (Decrease) in Partners' Capital [Roll Forward]
Conversion and redemption of downREIT OP units	103	366
Federal Realty OP LP \| downREIT OP units \| Noncontrolling Interests in Consolidated Partnerships
Increase (Decrease) in Partners' Capital [Roll Forward]
Conversion and redemption of downREIT OP units	$ (103)	$ (366)

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Partners' Capital Account, Capped call premiums

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after income tax of income (loss) including the portion attributable to nonredeemable noncontrolling interest. Excludes the portion attributable to redeemable noncontrolling interest recognized as temporary equity.

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Total contributions made by each class of partners (i.e., general, limited and preferred partners).

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Total change in each class of partners' capital accounts during the year due to exchanges and conversions. Partners include general, limited and preferred partners.

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