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Income Taxes (Summary Of Changes To Company's Liabilities For UTPs) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Income Taxes [Abstract]    
Opening balance - January 1 $ 80,732 $ 139,916
Unrecognized tax benefits 581 (7)
Potential additional interest 405 1,486
Potential penalty adjustment 27 7
Statute expirations (566) (948)
Ending balance - March 31 $ 81,179 $ 140,454