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Basis of Presentation and Summary of Significant Accounting Policies (Evaluation Of Asset Impairment) (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Impairments	$ 0	$ 0	$ 0	$ 0

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- References

No definition available.

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

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No definition available.

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