Stock Option Plan (Other Information Regarding Options Outstanding And Exercisable) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, # of shares	197,050
Options Outstanding, WAEP	$ 18.87
Options Outstanding, Aggregate Intrinsic Value	$ 52
Options Exercisable, # of shares	192,800
Options Exercisable, WAEP	$ 19.20
Options Exercisable, Aggregate Intrinsic Value	35
Range Of Exercise Price $ 2.54 - $ 6.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, Lower	$ 2.54
Range of exercise price, Upper	$ 6.00
Options Outstanding, # of shares	23,550
Options Outstanding, WAEP	$ 5.00
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	3 years 7 months 10 days
Options Outstanding, Aggregate Intrinsic Value	49
Options Exercisable, # of shares	20,500
Options Exercisable, WAEP	$ 5.36
Options Exercisable, Aggregate Intrinsic Value	35
Range Of Exercise Price $ 6.01 - $ 10.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, Lower	$ 6.01
Range of exercise price, Upper	$ 10.00
Options Outstanding, # of shares	28,200
Options Outstanding, WAEP	$ 9.14
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	3 years 4 months 21 days
Options Outstanding, Aggregate Intrinsic Value	3
Options Exercisable, # of shares	27,000
Options Exercisable, WAEP	$ 9.27
Options Exercisable, Aggregate Intrinsic Value
Range Of Exercise Price $ 10.01 - $ 17.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, Lower	$ 10.01
Range of exercise price, Upper	$ 17.50
Options Outstanding, # of shares	2,300
Options Outstanding, WAEP	$ 17.43
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	11 months 1 day
Options Outstanding, Aggregate Intrinsic Value
Options Exercisable, # of shares	2,300
Options Exercisable, WAEP	$ 17.43
Options Exercisable, Aggregate Intrinsic Value
Range Of Exercise Price $ 17.51 - $ 20.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, Lower	$ 17.51
Range of exercise price, Upper	$ 20.00
Options Outstanding, # of shares	38,500
Options Outstanding, WAEP	$ 17.80
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	3 years 9 months
Options Outstanding, Aggregate Intrinsic Value
Options Exercisable, # of shares	38,500
Options Exercisable, WAEP	$ 17.80
Options Exercisable, Aggregate Intrinsic Value
Range Of Exercise Price $ 20.01 - $ 25.93 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, Lower	$ 20.01
Range of exercise price, Upper	$ 25.93
Options Outstanding, # of shares	104,500
Options Outstanding, WAEP	$ 25.04
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	3 years 5 months 27 days
Options Outstanding, Aggregate Intrinsic Value
Options Exercisable, # of shares	104,500
Options Exercisable, WAEP	$ 25.04
Options Exercisable, Aggregate Intrinsic Value