Stock-Based Compensation Plan (Schedule Of Shares Authorized Under Stock Option Plans, By Exercise Price Range) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options \| shares	2,408
Exercisable options \| shares	2,094
Exercisable options, remaining life in years	5 years
Exercisable options, weighted average exercise price	$ 8.79
$4.00 - $7.53 Exercise Price Range [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit	4.00
Exercise price, upper limit	$ 7.53
Outstanding options \| shares	950
Exercisable options \| shares	848
Exercisable options, remaining life in years	3 years 7 months 6 days
Exercisable options, weighted average exercise price	$ 6.91
$7.54 - $16.00 Exercise Price Range [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit	7.54
Exercise price, upper limit	$ 16.00
Outstanding options \| shares	1,458
Exercisable options \| shares	1,246
Exercisable options, remaining life in years	5 years 10 months 24 days
Exercisable options, weighted average exercise price	$ 10.07