Rental Properties (Summary Of Carrying Amounts Of Rental Properties) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Real Estate Properties [Line Items]
Carrying amounts of rental properties	$ 6,051,937		$ 5,998,003
Accumulated depreciation	(1,671,309)		(1,562,645)
Real Estate Investment Property, Net	4,380,628		4,435,358
Depreciation expense on rental properties	122,800	$ 121,900
Building and improvements [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	4,704,285		4,632,557
Furniture, fixtures & equipment [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	120,821		118,575
Land [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	1,198,378		1,218,418
Leaseholds and Leasehold Improvements [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	$ 28,453		$ 28,453

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The cumulative amount of depreciation for real estate property held for investment purposes.

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Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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