Consolidated Statements of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Shares issued pursuant to dividend reinvestment plan	143,957,000	293,615,000	228,498,000
Shares due to exercise of employee stock options and issuance of directors' deferred stock	31,581,000	70,231,000	16,887,000
Issuance of partnership units (in shares)			51,579,000
Limited Partner
Shares issued pursuant to dividend reinvestment plan	26,659,000	61,009,000
Twinbrook Metro Station
Stock issued during period, shares, acquisitions		469,740,000
Twinbrook Metro Station | Restricted Stock Units (RSUs)
Stock issued during period, shares, acquisitions	1,416,071,000
Restricted units released pursuant to first escrow release (in shares)		708,036,000
Ashbrook Marketplace
Stock issued during period, shares, acquisitions		93,674,000
Dividend declared
Distributions payable common stock and partnership units (in usd per share)	$ 0.59	$ 0.57	$ 0.53
Dividend declared | Series D Cumulative Redeemable Preferred Stock
Distributions payable on preferred stock (in usd per share)	38.28	38.28	38.28
Dividend declared | Series E Cumulative Redeemable Preferred Stock
Distributions payable on preferred stock (in usd per share)	$ 37.50	$ 37.50	$ 37.50