Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plan (Schedule Of Shares Authorized Under Stock Option Plans, By Exercise Price Range) (Details)

v3.10.0.1
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, 2018
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Outstanding options | shares 3,956
Exercisable options | shares 2,268
Outstanding options, remaining life in years 5 years 8 months 12 days
Exercisable options, remaining life in years 5 years 8 months 12 days
Exercisable options, weighted average exercise price $ 7.80
$4.00 - $8.64 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 $ 8.64
Outstanding options | shares 2,870
Exercisable options | shares 1,502
Outstanding options, remaining life in years 5 years 9 months 18 days
Exercisable options, remaining life in years 5 years 9 months 18 days
Exercisable options, weighted average exercise price $ 6.66
$8.64 - $13.38 Exercise Price Range [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price, lower limit 8.64
Exercise price, upper limit $ 13.38
Outstanding options | shares 1,086
Exercisable options | shares 766
Outstanding options, remaining life in years 5 years 6 months
Exercisable options, remaining life in years 5 years 6 months
Exercisable options, weighted average exercise price $ 10.04