Summary Of Significant Accounting Policies Consolidated Statement of Cash Flows - Supplemental Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Total interest costs incurred			$ 147,939	$ 141,994
Interest capitalized			(15,697)	(17,159)
Interest expense	$ 44,237	$ 42,726	132,242	124,835
Cash paid for interest, net of amounts capitalized			123,586	113,414
Cash paid for income taxes			190	778
Shares issued under dividend reinvestment plan			1,259	1,275
DownREIT operating partnership units redeemed for common shares			$ 366	$ 883