Goodwill And Intangible Assets (Schedule Of Changes In Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets [Abstract]
Balance, beginning of period	$ 37,248	$ 39,482	$ 6,731
Acquisitions		1,727	35,164
Impairment losses		(3,961)	(2,413)
Balance, end of period	$ 37,248	$ 37,248	$ 39,482

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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