Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 29,991	$ 29,961
Accumulated Amortization	(20,965)	(18,724)
Net Carrying Amount	9,026	11,237
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,823	17,793
Accumulated Amortization	(12,052)	(10,702)
Net Carrying Amount	5,771	7,091
Technology Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,300	11,300
Accumulated Amortization	(8,753)	(7,880)
Net Carrying Amount	2,547	3,420
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	868	868
Accumulated Amortization	(160)	(142)
Net Carrying Amount	$ 708	$ 726