Stock Incentive Plans (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013
Summary of stock options outstanding
Options Outstanding, Number Outstanding	934,000
Options Outstanding, Weighted Average Exercise Price	$ 47.35
Options Outstanding, Weighted Average Remaining Contract Life	6 years 1 month
Options Exercisable, Number Exercisable	421,000
Options Exercisable, Weighted Average Exercise Price	$ 43.99
Options Exercisable,Weighted Average Remaining Contract Life	5 years 1 month
Options Outstanding, Aggregate Intrinsic Value	$ 6,855,000
Options Exercisable, Aggregate Intrinsic Value	$ 4,224,000
Range One [Member]
Summary of stock options outstanding
Range of Per Share Exercise Prices	$30-$40
Options Outstanding, Number Outstanding	195,000
Options Outstanding, Weighted Average Exercise Price	$ 36.8
Options Outstanding, Weighted Average Remaining Contract Life	4 years 4 months
Options Exercisable, Number Exercisable	130,000
Options Exercisable, Weighted Average Exercise Price	$ 36.7
Options Exercisable,Weighted Average Remaining Contract Life	3 years 11 months
Range Two [Member]
Summary of stock options outstanding
Range of Per Share Exercise Prices	$40-$50
Options Outstanding, Number Outstanding	461,000
Options Outstanding, Weighted Average Exercise Price	$ 45.77
Options Outstanding, Weighted Average Remaining Contract Life	5 years 10 months
Options Exercisable, Number Exercisable	236,000
Options Exercisable, Weighted Average Exercise Price	$ 44.86
Options Exercisable,Weighted Average Remaining Contract Life	5 years 1 month
Range Three [Member]
Summary of stock options outstanding
Range of Per Share Exercise Prices	$50+
Options Outstanding, Number Outstanding	278,000
Options Outstanding, Weighted Average Exercise Price	$ 57.33
Options Outstanding, Weighted Average Remaining Contract Life	8 years 0 months
Options Exercisable, Number Exercisable	55,000
Options Exercisable, Weighted Average Exercise Price	$ 57.33
Options Exercisable,Weighted Average Remaining Contract Life	8 years 0 months