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Fair Value Measurement (Schedule Of Changes In Fair Value Of Level 3 Liability) (Details) (Deferred Payments [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Deferred Payments [Member]
 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Deferred Payments, Beginning Balance $ 2,200
Deferred Payments, Amounts earned (20)
Deferred Payments, Adjustments to fair value 20
Deferred Payments, Transfers in or out of Level 3   
Deferred Payments, Ending Balance $ 2,200