Stock Based Compensation (Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options, Beginning of Year	2,945,400
Options, Exercised	229,700
Options, Canceled/Forfeited	100,534
Options, End of Year	2,615,166
Options, Exercisable at End of Year	2,615,166
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options, Beginning of Year, Weighted Average Exercise Price	$ 34.19
Options, Exercised, Weighted Average Exercise Price	$ 28.30
Options, Canceled/Forfeited, Weighted Average Exercise Price	$ 41.44
Options, End of Year, Weighted Average Exercise Price	$ 34.43
Options, Exercisable at End of Year, Weighted Average Exercise Price	$ 34.43
Options, Outstanding at December 31, 2013, Weighted Average Remaining Years Contractual Term	4 years 8 months 13 days
Options, Exercisable at December 31, 2013, Weighted Average Remaining Years Contractual Term	4 years 8 months 13 days
Options, Outstanding at December 31, 2013, Aggregate Intrinsic Value	$ 2,311,503
Options, Exercisable at December 31, 2013, Aggregate Intrinsic Value	$ 2,311,503