Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Equity Incentive Plans (Summary Of Restricted Share Unit Activity) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Number of Shares, Outstanding at December 31, 2022			609,228
Number of Shares, Granted			290,271
Number of Shares, Vested			(284,885)
Number of Shares, Outstanding at September 30, 2023	614,614		614,614
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2022			$ 44.44
Weighted Average Grant Date Fair Value, Granted			41.96
Weighted Average Grant Date Fair Value, Vested			$ 45.47
Weighted Average Life Remaining, Outstanding at September 30, 2023 (in years)			1 year 4 months 9 days
Weighted Average Grant Date Fair Value, Outstanding at September 30, 2023	$ 42.79		$ 42.79
Unamortized share-based compensation expense	$ 13,000,000.0		$ 13,000,000.0
Severance Costs	$ 0	$ 547,000	$ 1,836,000	$ 547,000
Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Number of Shares, Outstanding at December 31, 2022			42,048
Number of Shares, Granted			41,754
Number of Shares, Vested			(42,048)
Number of Shares, Outstanding at September 30, 2023	41,754		41,754
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2022			$ 41.67
Weighted Average Grant Date Fair Value, Granted			40.11
Weighted Average Grant Date Fair Value, Vested			$ 41.67
Weighted Average Life Remaining, Outstanding at September 30, 2023 (in years)			11 months 1 day
Weighted Average Grant Date Fair Value, Outstanding at September 30, 2023	$ 40.11		$ 40.11
Unamortized share-based compensation expense	$ 1,500,000		$ 1,500,000
Restricted Share Units [Member] \| Non-Employee Trustees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Share-based Payment Arrangement, Expense			900,000	1,000,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Share-based Payment Arrangement, Expense			3,400,000	3,800,000
Severance Costs			$ 700,000	$ 0