Stock-Based Compensation (Schedule Of Range Of Exercise Prices For Outstanding Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Range One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Prices, Lower Limit	$ 14.24
Range of Prices, Upper Limit	$ 19.29
Options Outstanding	170,553
Weighted Average Remaining Contractual Life (Years)	54 months 2 days
Range Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Prices, Lower Limit	$ 20.53
Range of Prices, Upper Limit	$ 27.24
Options Outstanding	114,411
Weighted Average Remaining Contractual Life (Years)	71 months 11 days
Range Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Prices, Lower Limit	$ 30.07
Range of Prices, Upper Limit	$ 36.10
Options Outstanding	135,119
Weighted Average Remaining Contractual Life (Years)	37 months 19 days
Range Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Prices, Lower Limit	$ 45.83
Range of Prices, Upper Limit	$ 60.11
Options Outstanding	166,163
Weighted Average Remaining Contractual Life (Years)	92 months 17 days
Range Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Prices, Lower Limit	$ 80.77
Range of Prices, Upper Limit	$ 91.40
Options Outstanding	72,369
Weighted Average Remaining Contractual Life (Years)	109 months 21 days