Stock-Based Compensation Stock-Based Compensation (Shares Authorized Under Stock Appreciation Rights By Exercise Price) (Details) (Stock Appreciation Rights (SARs), USD $)	12 Months Ended
	Dec. 31, 2014
$44.31
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding and exercisable options, number of shares	91,255
Outstanding and exercisable options weighted average remaining contractual life, years	3 years
Outstanding and exercisable options, weighted average exercise price	$ 44.31
$51.76
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding and exercisable options, number of shares	40,515
Outstanding and exercisable options weighted average remaining contractual life, years	1 year 10 months 24 days
Outstanding and exercisable options, weighted average exercise price	$ 51.76