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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Goodwill And Other Intangible Assets (Schedule Of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2015
Goodwill [Line Items]
Beginning Balance
Increase due to acquisitions	17,745
Decrease due to impairment		$ (29,507)
Ending Balance	17,745
Black Diamond [Member]
Goodwill [Line Items]
Beginning Balance
Increase due to acquisitions
Ending Balance
Sierra [Member]
Goodwill [Line Items]
Beginning Balance
Increase due to acquisitions	17,745
Ending Balance	$ 17,745