Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 29,925	$ 29,931
Accumulated Amortization	(18,176)	(16,008)
Net Carrying Amount	11,749	13,923
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,757	17,763
Accumulated Amortization	(10,239)	(8,916)
Net Carrying Amount	7,518	8,847
Technology Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,300	11,300
Accumulated Amortization	(7,801)	(6,974)
Net Carrying Amount	3,499	4,326
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	868	868
Accumulated Amortization	(136)	(118)
Net Carrying Amount	$ 732	$ 750