SCHEDULE III (Details2) - USD ($)		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023	Dec. 31, 2022
Noncontrolling Interest in Joint Ventures		$ 924,000		$ 774,000	$ 700,000
Estimated aggregate cost of real estate properties for federal income tax purposes		5,836,498,000
Estimated accumulated tax depreciation		1,062,930,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of year	[1]	5,493,195,000		4,934,421,000	4,051,325,000
Purchases of real estate properties		381,774,000		160,105,000	353,221,000
Development of real estate properties and value-add properties		245,033,000		388,213,000	506,154,000
Improvements to real estate properties		60,007,000		51,643,000	40,654,000
Right-of-use asset, net - ground leases		20,397,000		(1,395,000)	(3,244,000)
Carrying amount of investments sold		(18,633,000)		(33,022,000)	(9,811,000)
Write-off of improvements		(3,857,000)		(6,770,000)	(3,878,000)
Balance at end of year	[1]	6,177,916,000	[2],[3]	5,493,195,000	4,934,421,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year		1,273,723,000		1,150,814,000	1,035,617,000
Depreciation expense		155,240,000		141,003,000	125,199,000
Accumulated depreciation on assets sold		(10,268,000)		(11,759,000)	(6,068,000)
Other		(3,119,000)		(6,335,000)	(3,934,000)
Balance at end of year		$ 1,415,576,000	[2],[3]	$ 1,273,723,000	$ 1,150,814,000
Buildings [Member]
Property, Plant and Equipment, Useful Life		40 years
Minimum [Member] | Building Improvements
Property, Plant and Equipment, Useful Life		3 years
Maximum [Member] | Building Improvements
Property, Plant and Equipment, Useful Life		15 years

[1] Includes noncontrolling interest in joint ventures of $924,000, $774,000 and $700,000 at December 31, 2024, 2023 and 2022, respectively.

[2] The estimated aggregate cost of real estate properties at December 31, 2024 for federal income tax purposes was approximately $5,836,498,000 before estimated accumulated tax depreciation of $1,062,930,000.  The federal income tax return for the year ended December 31, 2024, has not been filed and accordingly, this estimate is based on preliminary data.

[3] Changes in Real Estate Properties and Development and Value-Add Properties follow:                                                                                                                                                                                                                                                                                                                                                                                    Years Ended December 31,202420232022(In thousands)Balance at beginning of year $5,493,195 4,934,421 4,051,325 Purchases of real estate properties 381,774 160,105 353,221 Development of real estate properties and value-add properties245,033 388,213 506,154 Improvements to real estate properties60,007 51,643 40,654 Right-of-use assets, net – ground leases20,397 (1,395)(3,244)Carrying amount of investments sold (18,633)(33,022)(9,811)Write-off of improvements (3,857)(6,770)(3,878) Balance at end of year (1)  $6,177,916 5,493,195 4,934,421 
(1) Includes noncontrolling interest in joint ventures of $924,000, $774,000 and $700,000 at December 31, 2024, 2023 and 2022, respectively.
Changes in the accumulated depreciation on real estate properties follow:                                                                                                                                                                                                                                                                                                                                                                                   Years Ended December 31,202420232022(In thousands)Balance at beginning of year $1,273,723 1,150,814 1,035,617 Depreciation expense 155,240 141,003 125,199 Accumulated depreciation on assets sold (10,268)(11,759)(6,068)Other (3,119)(6,335)(3,934)Balance at end of year $1,415,576 1,273,723 1,150,814