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

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Share Options And Awards (Narrative) (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
	Jul. 15, 2021	Jun. 30, 2021	Dec. 31, 2020
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense		$ 2.7	$ 1.8
Weighted average expected amortization period for unrecognized compensation cost (in years)		2 years	1 year 7 months 6 days
Service-Based Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded		226,379
Share-based Payment Arrangement, Employee [Member] \| Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Shares awarded	139,355
Compensation cost	$ 4.5	$ 3.8