Long-term Equity-based Compensation Plans Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	2,314,050	2,543,673
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 39.61	$ 41.37
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	4 years 2 months 12 days
Range of Exercise Prices $10.00 - $15.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 10
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 15
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	16,750
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 13.55
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	2 years 8 months 12 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	16,750
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 13.55
Range of Exercise Prices $15.01 - $20.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 15.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 20
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	8,000
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 16.48
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	4 years 7 months 6 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	8,000
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 16.48
Range of Exercise Prices $20.01 - $25.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 20.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 25
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	30,750
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 23.38
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	4 years 2 months 5 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	30,750
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 23.38
Range of Exercise Prices $25.01 - $30.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 25.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 30
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	389,000
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 28.85
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	6 years 8 months 16 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	339,248
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 28.74
Range of Exercise Prices $30.01 - $35.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 30.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 35
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	243,750
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 33.18
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	8 years 3 months 15 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	140,500
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 32.98
Range of Exercise Prices $35.01 - $40.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 35.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 40
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	586,625
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 36.90
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	6 years 3 months 4 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	395,623
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 37.11
Range of Exercise Prices $40.01 - $45.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 40.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 45
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	185,902
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 43.10
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	0 years 4 months 2 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	185,902
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 43.10
Range of Exercise Prices $45.01 - $50.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 45.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 50
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	796,505
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 48.59
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	1 year 4 months 28 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	796,505
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 48.59
Range of Exercise Prices $50.01 - $55.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 50.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 55
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	56,768
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 51.16
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	0 years 4 months 6 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	56,768
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 51.16
Range of Exercise Prices $10.00 - $50.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 10
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 55
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	2,314,050
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$ 39.61
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	4 years 2 months 12 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	1,970,046
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$ 40.49