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Investment Income, Net (Schedule Of Investment Income (Expense), Net) (Details) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Investment Income, Net        
Interest and dividend income from cash, cash equivalents and investments $ 38 $ 31 $ 68 $ 49