Stock Based Compensation (Stock Options By Exercise Price Range) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding	292,267	318,002	368,437
Weighted Average Remaining Contractual Life in Years	5 years 3 months 18 days
Weighted Average Exercise Price	$ 10.13	$ 9.89	$ 9.21
Options Exercisable	272,142
Weighted Average Exercise Price	$ 10.27	$ 10.44
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 5.00
Exercise Price Range, Upper Range Limit	$ 7.50
Options Outstanding	92,267
Weighted Average Remaining Contractual Life in Years	6 years 3 months 18 days
Weighted Average Exercise Price	$ 6.22
Options Exercisable	92,267
Weighted Average Exercise Price	$ 6.22
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 7.51
Exercise Price Range, Upper Range Limit	$ 11.25
Options Outstanding	80,500
Weighted Average Remaining Contractual Life in Years	7 years 1 month 6 days
Weighted Average Exercise Price	$ 8.33
Options Exercisable	60,375
Weighted Average Exercise Price	$ 8.35
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 11.26
Exercise Price Range, Upper Range Limit	$ 16.50
Options Outstanding	90,000
Weighted Average Remaining Contractual Life in Years	4 years
Weighted Average Exercise Price	$ 13.52
Options Exercisable	90,000
Weighted Average Exercise Price	$ 13.52
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 16.51
Exercise Price Range, Upper Range Limit	$ 17.25
Options Outstanding	29,500
Weighted Average Remaining Contractual Life in Years	1 year 7 months 6 days
Weighted Average Exercise Price	$ 16.94
Options Exercisable	29,500
Weighted Average Exercise Price	$ 16.94