Stock Option Plan (Other Information Regarding Options Outstanding And Exercisable) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, # of shares	294,380
Options Outstanding, WAEP	$ 19.18
Options Outstanding, Aggregate Intrinsic Value	$ 17
Options Exercisable, # of shares	288,480
Options Exercisable, WAEP	$ 19.49
Options Exercisable, Aggregate Intrinsic Value	6
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	41,350
Options Outstanding, WAEP	$ 5.16
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	2 years 10 months 21 days
Options Outstanding, Aggregate Intrinsic Value	17
Options Exercisable, # of shares	37,350
Options Exercisable, WAEP	$ 5.44
Options Exercisable, Aggregate Intrinsic Value	6
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	33,680
Options Outstanding, WAEP	$ 9.20
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	4 years 1 month 2 days
Options Outstanding, Aggregate Intrinsic Value
Options Exercisable, # of shares	31,880
Options Exercisable, WAEP	$ 9.37
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)	1 year 8 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	51,300
Options Outstanding, WAEP	$ 17.79
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	4 years 6 months
Options Outstanding, Aggregate Intrinsic Value
Options Exercisable, # of shares	51,200
Options Exercisable, WAEP	$ 17.79
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	165,750
Options Outstanding, WAEP	$ 25.15
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	3 years 4 months 13 days
Options Outstanding, Aggregate Intrinsic Value
Options Exercisable, # of shares	165,750
Options Exercisable, WAEP	$ 25.15
Options Exercisable, Aggregate Intrinsic Value