Incentive Compensation Plans (Schedule of Stock Options, by Exercise Price Range) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock options outstanding, Number of shares	706,925
Stock options outstanding, Weighted-average remaining contractual life	6 years 3 months 18 days
Stock options outstanding, Weighted-average exercise price	$ 28.61
Stock options exercisable, Number of shares	505,769
Stock options exercisable, Weighted-average exercise price	$ 26.60
Stock options exercisable, Weighted-average remaining contractual life	5 years 1 month 6 days
Exercise Price Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 9.28
Exercise Price Range, Upper Range Limit	$ 18.15
Stock options outstanding, Number of shares	119,350
Stock options outstanding, Weighted-average remaining contractual life	3 years 2 months 12 days
Stock options outstanding, Weighted-average exercise price	$ 14.45
Stock options exercisable, Number of shares	119,350
Stock options exercisable, Weighted-average exercise price	$ 14.45
Exercise Price Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 18.49
Exercise Price Range, Upper Range Limit	$ 27.29
Stock options outstanding, Number of shares	137,525
Stock options outstanding, Weighted-average remaining contractual life	5 years 10 months 24 days
Stock options outstanding, Weighted-average exercise price	$ 20.91
Stock options exercisable, Number of shares	129,369
Stock options exercisable, Weighted-average exercise price	$ 20.78
Exercise Price Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 27.54
Exercise Price Range, Upper Range Limit	$ 32.78
Stock options outstanding, Number of shares	183,500
Stock options outstanding, Weighted-average remaining contractual life	7 years 10 months 24 days
Stock options outstanding, Weighted-average exercise price	$ 32.08
Stock options exercisable, Number of shares	68,243
Stock options exercisable, Weighted-average exercise price	$ 31.85
Exercise Price Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 33.25
Exercise Price Range, Upper Range Limit	$ 35.70
Stock options outstanding, Number of shares	125,000
Stock options outstanding, Weighted-average remaining contractual life	6 years 3 months 18 days
Stock options outstanding, Weighted-average exercise price	$ 34.72
Stock options exercisable, Number of shares	100,278
Stock options exercisable, Weighted-average exercise price	$ 34.64
Exercise Price Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 36.15
Exercise Price Range, Upper Range Limit	$ 42.50
Stock options outstanding, Number of shares	141,550
Stock options outstanding, Weighted-average remaining contractual life	7 years
Stock options outstanding, Weighted-average exercise price	$ 38.13
Stock options exercisable, Number of shares	88,529
Stock options exercisable, Weighted-average exercise price	$ 38.33