Intangible Assets (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 11,130	$ 11,130
Accumulated Amortization	(6,605)	(5,397)
Net Carrying Amount	4,525	5,733
Trademarks And Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,786	1,786
Accumulated Amortization	(1,786)	(1,786)
Net Carrying Amount
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,344	9,344
Accumulated Amortization	(4,819)	(3,611)
Net Carrying Amount	$ 4,525	$ 5,733