Stock Transactions and Stock-Based Compensation (Summary of Options Outstanding) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
$22.62 to $31.26
Options, Exercise Price, lower range limit	$ 22.62
Options, Exercise Price, upper range limit	$ 31.26
Outstanding, Shares (in Thousands)	6,011
Outstanding, Average Exercise Price	$ 28.44
Outstanding, Average Remaining Life, in years	3 years
Exercisable, Shares (in Thousands)	5,092
Exercisable, Average Exercise Price	$ 28.61
$31.27 to $38.81
Options, Exercise Price, lower range limit	$ 31.27
Options, Exercise Price, upper range limit	$ 38.81
Outstanding, Shares (in Thousands)	6,709
Outstanding, Average Exercise Price	$ 36.51
Outstanding, Average Remaining Life, in years	5 years
Exercisable, Shares (in Thousands)	5,034
Exercisable, Average Exercise Price	$ 36.17
$38.82 to $49.59
Options, Exercise Price, lower range limit	$ 38.82
Options, Exercise Price, upper range limit	$ 49.59
Outstanding, Shares (in Thousands)	3,596
Outstanding, Average Exercise Price	$ 44.51
Outstanding, Average Remaining Life, in years	6 years
Exercisable, Shares (in Thousands)	2,092
Exercisable, Average Exercise Price	$ 41.25
$49.60 to $60.98
Options, Exercise Price, lower range limit	$ 49.6
Options, Exercise Price, upper range limit	$ 60.98
Outstanding, Shares (in Thousands)	4,992
Outstanding, Average Exercise Price	$ 51.85
Outstanding, Average Remaining Life, in years	8 years
Exercisable, Shares (in Thousands)	965
Exercisable, Average Exercise Price	$ 51.20
$60.99 to $72.63
Options, Exercise Price, lower range limit	$ 60.99
Options, Exercise Price, upper range limit	$ 72.63
Outstanding, Shares (in Thousands)	3,663
Outstanding, Average Exercise Price	$ 64.75
Outstanding, Average Remaining Life, in years	9 years
Exercisable, Shares (in Thousands)	20
Exercisable, Average Exercise Price	$ 67.17