Stock-Based Compensation (Weighted Average Price And Weighted Average Remaining Contractual Life) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding	207,303	214,618
Number Exercisable	122,253	128,568
Weighted Average Exercise Price	$ 15.92	$ 15.98
Remaining Contractual Life	2 years 10 months 13 days	3 years 6 months 15 days
Intrinsic Value	$ 1,238,000	$ 588,000
Range of Exercise Prices 6.93-10.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 6.93	$ 6.93
Range of Exercise Prices, Upper Limit	$ 10.99	$ 10.99
Number Outstanding	85,050	86,050
Weighted Average Exercise Price	$ 8.65	$ 8.67
Remaining Contractual Life	4 years 4 months 24 days	5 years 1 month 28 days
Intrinsic Value	1,047,000	588,000
Range of Exercise Prices 14.00-19.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 14.00	$ 14.00
Range of Exercise Prices, Upper Limit	$ 19.99	$ 19.99
Number Outstanding	55,401	61,715
Number Exercisable	55,401	61,715
Weighted Average Exercise Price	$ 17.51	$ 17.62
Remaining Contractual Life	2 years 2 months 19 days	2 years 8 months 19 days
Intrinsic Value	$ 191,000
Range of Exercise Prices 20.00-22.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 20.00	$ 20.00
Range of Exercise Prices, Upper Limit	$ 22.99	$ 22.99
Number Outstanding	18,811	18,812
Number Exercisable	18,811	18,812
Weighted Average Exercise Price	$ 22.78	$ 22.78
Remaining Contractual Life	1 year 2 months 19 days	1 year 11 months 19 days
Range of Exercise Prices 23.00-24.27 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 23.00	$ 23.00
Range of Exercise Prices, Upper Limit	$ 24.27	$ 24.27
Number Outstanding	48,041	48,041
Number Exercisable	48,041	48,041
Weighted Average Exercise Price	$ 24.27	$ 24.27
Remaining Contractual Life	1 year 6 months 18 days	2 years 3 months 15 days