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Earnings Per Share (Schedule Of Weighted Average Number Of Anti-Dilutive Stock Options And Restricted Stock Units) (Details) (Stock Options [Member])
In Thousands
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Stock Options [Member]
    
Weighted average number of shares underlying anti-dilutive options665598566654