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Shareholders' Equity (Weighted Average Exercise Price And Fair Value Of Options Granted) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Shareholders' Equity [Abstract] |  |  |
Weighted average exercise price per share, Less than market price | $ 35.21 | $ 50.74 | $ 52.23
Weighted average fair value on grant date, Less than market price, per share | $ 8.45 | $ 12.12 | $ 11.99

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Less Than Market Share + References No definition available. + Details
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Fair Value On Grant Date Less Than Market Share + References No definition available. + Details
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- Details
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