Rental Properties (Summary Of Carrying Amounts Of Rental Properties) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Real Estate Properties [Line Items]
Carrying amounts of rental properties	$ 6,791,516		$ 6,209,145
Accumulated depreciation	(1,830,912)		(1,714,886)
Real Estate Investment Property, Net	4,960,604		4,494,259
Depreciation expense on rental properties	141,000	$ 122,800
Building and improvements [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	5,302,712		4,832,134
Furniture, fixtures & equipment [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	132,388		122,351
Land [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	1,326,589		1,226,207
Leaseholds and Leasehold Improvements [Member]
Real Estate Properties [Line Items]
Carrying amounts of rental properties	$ 29,827		$ 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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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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