Stock-Based Compensation - Option Summary (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
$0.00 - $10.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 0.00
Exercise Price Range, Upper Range Limit	$ 10.00
Number of Outstanding Options, Exercise Price Range	0
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	0 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 0
Number of Exercisable Options, Exercise Price Range	0
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 0
$10.01 - $20.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 10.01
Exercise Price Range, Upper Range Limit	$ 20.00
Number of Outstanding Options, Exercise Price Range	6,155
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	3 years 1 month
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 18.82
Number of Exercisable Options, Exercise Price Range	6,155
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 18.82
$20.01 - $30.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 20.01
Exercise Price Range, Upper Range Limit	$ 30.00
Number of Outstanding Options, Exercise Price Range	0
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	0 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 0
Number of Exercisable Options, Exercise Price Range	0
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 0
$30.01 - $40.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 30.01
Exercise Price Range, Upper Range Limit	$ 40.00
Number of Outstanding Options, Exercise Price Range	37,602
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	4 years 10 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 37.86
Number of Exercisable Options, Exercise Price Range	4,954
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 37.73
$40.01 - $50.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 40.01
Exercise Price Range, Upper Range Limit	$ 50.00
Number of Outstanding Options, Exercise Price Range	2,192
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	5 years 6 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 46.21
Number of Exercisable Options, Exercise Price Range	731
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 46.21
Total
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of Outstanding Options, Exercise Price Range	75,251
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	5 years 2 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 44.49
Number of Exercisable Options, Exercise Price Range	11,840
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 28.42