Stock-Based Compensation (Shares Authorized Under Stock Option Plans By Exercise Price Range) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Stock Options [Member] | $37.69 - $37.83 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Minimum	$ 37.69
Exercise Prices Maximum	$ 37.83
Outstanding and Exercisable Options, Number Of Shares	68,920
Outstanding and exercisable options weighted average remaining contractual life, years	1 year
Outstanding and Exercisable Options, Weighted Average Exercise Price	$ 37.81
Directors Plan [Member] | $28.23 - $41.21 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Minimum	$ 28.23
Exercise Prices Maximum	$ 41.21
Outstanding and Exercisable Options, Number Of Shares	66,500
Outstanding and exercisable options weighted average remaining contractual life, years	4 years 7 months 6 days
Outstanding and Exercisable Options, Weighted Average Exercise Price	$ 36.64
Directors Plan [Member] | $53.81 - $73.26 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Minimum	$ 53.81
Exercise Prices Maximum	$ 73.26
Outstanding and Exercisable Options, Number Of Shares	105,000
Outstanding and exercisable options weighted average remaining contractual life, years	4 years 6 months
Outstanding and Exercisable Options, Weighted Average Exercise Price	$ 61.24