Share-Based Compensation (Stock Option Awards) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number of Options	433,750	451,025
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years)	4 years 2 months 12 days
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share)	$ 49.11	$ 47.22
Options Exercisable, Number of Options	353,750
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share)	$ 50.37
$33.61-40.53 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	$ 33.61
Range of Exercise Prices, upper limit (in dollars per share)	$ 45.30
Options Outstanding, Number of Options	125,250
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years)	8 years
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share)	$ 40.36
Options Exercisable, Number of Options	45,250
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share)	$ 34.76
$47.61-51.51 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	$ 47.61
Range of Exercise Prices, upper limit (in dollars per share)	$ 51.51
Options Outstanding, Number of Options	161,000
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years)	3 years 7 months 6 days
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share)	$ 49.70
Options Exercisable, Number of Options	161,000
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share)	$ 49.70
$52.13-58.83 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	$ 52.13
Range of Exercise Prices, upper limit (in dollars per share)	$ 58.83
Options Outstanding, Number of Options	147,500
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years)	1 year 10 months 24 days
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share)	$ 55.88
Options Exercisable, Number of Options	147,500
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share)	$ 55.88