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Stock Compensation Plans (Weighted Average Grant-Date Fair Value Of SSARS And Assumptions Under Black-Scholes Option Model) (Details) - Settled Stock Appreciation Rights (SSARs) [Member] - $ / shares
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average grant-date fair value, dollars per share $ 7.41 $ 13.11
Weighted average assumptions under Black-Scholes option model:    
Expected life of awards, years 3 years 3 years
Risk-free interest rate, percent 0.90% 0.90%
Expected volatility, percent 25.90% 35.70%
Expected dividend yield, percent 1.10% 0.80%