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Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Mar. 31, 2009
Finite-Lived Intangible Assets [Line Items]      
Other intangible assets, gross carrying amount $ 29,931 $ 29,975  
Accumulated Amortization (16,008) (11,403)  
Net Carrying Amount 13,923 18,572  
Customer Relationships [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Other intangible assets, gross carrying amount 17,763 17,807  
Accumulated Amortization (8,916) (7,165)  
Net Carrying Amount 8,847 10,642  
Technology Licenses [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Other intangible assets, gross carrying amount 11,300 11,300 11,300
Accumulated Amortization (6,974) (4,144)  
Net Carrying Amount 4,326 7,156  
Other [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Other intangible assets, gross carrying amount 868 868  
Accumulated Amortization (118) (94)  
Net Carrying Amount $ 750 $ 774