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Shareholders' Equity (Stock Option Plans) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Balance 25,610 27,043 27,881
Balance, weighted avg. price $ 20.81 $ 20.06 $ 20.42
Granted 2,281 2,470 2,534
Granted, weighted avg. price $ 33.67 $ 22.40 $ 15.77
Exercised (3,733) (3,136) (1,364)
Exercised, weighted avg. price $ 17.26 $ 15.19 $ 16.37
Expired or canceled (521) (767) (2,008)
Expired or canceled, weighted avg. price $ 22.25 $ 22.61 $ 22.07
Balance 23,637 25,610 27,043
Balance, weighted avg. price $ 22.58 $ 20.81 $ 20.06
Total options that were exercisable 14,601 9,760 11,680
Exercisable shares, weighted avg. price $ 19.45    
Available for future grant as of December 31, 2013 744