Share-Based Compensation Plans (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Information about options in various price ranges
Outstanding Shares	1,269
Weighted Average Remaining Contractual Term	6 years 3 months 18 days
Weighted Average Exercise Price	$ 58.03
Options Exercisable, shares	486
Options Exercisable, weighted average exercise price	$ 48.21
Less than $50.00 [Member]
Information about options in various price ranges
Upper limit price range	$ 50
Outstanding Shares	255
Weighted Average Remaining Contractual Term	2 years 6 months 0 days
Weighted Average Exercise Price	$ 41.45
Options Exercisable, shares	255
Options Exercisable, weighted average exercise price	$ 41.45
50.00-55.00 [Member]
Information about options in various price ranges
Lower limit price range	$ 50
Upper limit price range	$ 55
Outstanding Shares	273
Weighted Average Remaining Contractual Term	4 years 1 month 6 days
Weighted Average Exercise Price	$ 53.63
Options Exercisable, shares	133
Options Exercisable, weighted average exercise price	$ 53.63
55.00-60.00 [Member]
Information about options in various price ranges
Lower limit price range	$ 55
Upper limit price range	$ 60
Outstanding Shares	334
Weighted Average Remaining Contractual Term	7 years 7 months 6 days
Weighted Average Exercise Price	$ 58.23
Options Exercisable, shares	94
Options Exercisable, weighted average exercise price	$ 58.28
60.00 and over [Member]
Information about options in various price ranges
Lower limit price range	$ 60
Outstanding Shares	407
Weighted Average Remaining Contractual Term	9 years 1 month 6 days
Weighted Average Exercise Price	$ 71.20
Options Exercisable, shares	4
Options Exercisable, weighted average exercise price	$ 61.83