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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], USD $)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Settled Stock Appreciation Rights (SSARs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average grant-date fair value, dollars per share $ 13.13 $ 22.22
Weighted average assumptions under Black-Scholes option model:    
Expected life of awards, years 3 years 5 years 6 months
Risk-free interest rate, percent 0.90% 0.80%
Expected volatility, percent 35.70% 50.60%
Expected dividend yield, percent 0.80% 0.80%