Share-Based Compensation (Significant Ranges of Outstanding and Exercisable Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 9.10
Range of Exercise prices, upper range limit	$ 79.20
Options outstanding as of December 31, 2012	349,454
Weighted average remaining contractual life (years)	4 years 4 months 2 days
Weighted average exercise price	$ 28.15
Options exercisable as of December 31, 2012	259,046
Weighted average exercise price of exercisable options	$ 33.51
$9.10 - $9.10
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 9.10
Range of Exercise prices, upper range limit	$ 9.10
Options outstanding as of December 31, 2012	24,812
Weighted average remaining contractual life (years)	9 years 5 months 1 day
Weighted average exercise price	$ 9.10
Options exercisable as of December 31, 2012	0
Weighted average exercise price of exercisable options	$ 0.00
$10.55 -$10.55
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 10.55
Range of Exercise prices, upper range limit	$ 10.55
Options outstanding as of December 31, 2012	51,430
Weighted average remaining contractual life (years)	9 years 3 months
Weighted average exercise price	$ 10.55
Options exercisable as of December 31, 2012	0
Weighted average exercise price of exercisable options	$ 0.00
$13.60 - $23.80
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 13.60
Range of Exercise prices, upper range limit	$ 23.80
Options outstanding as of December 31, 2012	44,914
Weighted average remaining contractual life (years)	4 years 4 months 10 days
Weighted average exercise price	$ 20.98
Options exercisable as of December 31, 2012	41,033
Weighted average exercise price of exercisable options	$ 20.71
$25.00 -$25.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 25.00
Range of Exercise prices, upper range limit	$ 25.00
Options outstanding as of December 31, 2012	87,500
Weighted average remaining contractual life (years)	1 year 11 months 5 days
Weighted average exercise price	$ 25.00
Options exercisable as of December 31, 2012	87,500
Weighted average exercise price of exercisable options	$ 25.00
$27.60 - $27.60
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 27.60
Range of Exercise prices, upper range limit	$ 27.60
Options outstanding as of December 31, 2012	37,630
Weighted average remaining contractual life (years)	4 years 7 months 10 days
Weighted average exercise price	$ 27.60
Options exercisable as of December 31, 2012	30,552
Weighted average exercise price of exercisable options	$ 27.60
$29.00 - $41.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 29.00
Range of Exercise prices, upper range limit	$ 29.00
Options outstanding as of December 31, 2012	37,412
Weighted average remaining contractual life (years)	3 years 6 months 15 days
Weighted average exercise price	$ 33.15
Options exercisable as of December 31, 2012	34,205
Weighted average exercise price of exercisable options	$ 33.32
$41.80 - $52.60
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 41.80
Range of Exercise prices, upper range limit	$ 52.60
Options outstanding as of December 31, 2012	39,287
Weighted average remaining contractual life (years)	2 years 10 months 21 days
Weighted average exercise price	$ 50.48
Options exercisable as of December 31, 2012	39,287
Weighted average exercise price of exercisable options	$ 50.48
$53.20 - $73.40
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 53.20
Range of Exercise prices, upper range limit	$ 73.40
Options outstanding as of December 31, 2012	23,419
Weighted average remaining contractual life (years)	9 months
Weighted average exercise price	$ 61.52
Options exercisable as of December 31, 2012	23,419
Weighted average exercise price of exercisable options	$ 61.52
$76.40 - $76.40
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 76.40
Range of Exercise prices, upper range limit	$ 76.40
Options outstanding as of December 31, 2012	1,650
Weighted average remaining contractual life (years)	1 year
Weighted average exercise price	$ 76.40
Options exercisable as of December 31, 2012	1,650
Weighted average exercise price of exercisable options	$ 76.40
$79.20 - $79.20
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise prices, lower range limit	$ 79.20
Range of Exercise prices, upper range limit	$ 79.20
Options outstanding as of December 31, 2012	1,400
Weighted average remaining contractual life (years)	2 years 3 months
Weighted average exercise price	$ 79.20
Options exercisable as of December 31, 2012	1,400
Weighted average exercise price of exercisable options	$ 79.20