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Stock Compensation Plans (SSAR Activity) (Details) (Stock Appreciation Rights (SARs) [Member], USD $)
9 Months Ended
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding [Roll Forward]  
SSARs Outstanding, Beginning of Period, shares 1,094,836
SSARs granted, shares 301,400
SSARs exercised, shares (15,550)
SSARs canceled or forfeited, shares (20,631)
SSARs Outstanding, End of Period, shares 1,360,055
Weighted average SSAR exercise prices per share:  
Granted, dollars per share $ 55.20
Exercised, dollars per share $ 33.17
Canceled or forfeited, dollars per share $ 52.77
Outstanding, dollars per share $ 48.36
Minimum [Member]
 
SSAR price ranges per share:  
Granted, dollars per share $ 52.85
Exercised, dollars per share $ 21.45
Canceled or forfeited, dollars per share $ 21.45
Maximum [Member]
 
SSAR price ranges per share:  
Granted, dollars per share $ 55.23
Exercised, dollars per share $ 52.94
Canceled or forfeited, dollars per share $ 56.98