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Taxes On Income (Schedule Of Uncertain Tax Positions) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Taxes On Income [Abstract]    
Balance at the beginning of the year $ 53,183 $ 48,791
Additions related to interest and currency transaction 3,695 405
Additions based on tax positions taken during a prior period 5,925 5,336
Reduction related to tax positions taken during a prior period (8,660) (3,746)
Reductions related to settlement of tax matters (117) (4,684)
Additions based on tax positions taken during the current period 5,998 8,305
Reduction related to a lapse of applicable statute of limitation (7,426) (1,224)
Balance at the end of the year $ 52,599 $ 53,183