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Quarterly report pursuant to Section 13 or 15(d)

Stock Compensation Plans (Schedule Of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions) (Details)

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Stock Compensation Plans (Schedule Of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions) (Details) (USD $)
3 Months Ended
Mar. 31, 2012
Stock Compensation Plans [Abstract] Ìý
Share-based compensation grant date for performance shares March 12, 2012
Grant Date Market Price $ 63.62
Average Expected Term (Years) 2.80
Expected Volatility 56.00%
Risk-Free Interest Rate 0.45%
Dividend Yield 3.93%
Fair Value $ 77.78
Fair Value (Percent of Grant Date Market Price) 122.26%