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)

v3.20.1
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, 2019
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Outstanding options | shares 3,911
Exercisable options | shares 2,702
Outstanding options, remaining life in years 5 years 1 month 6 days
Exercisable options, remaining life in years 5 years 1 month 6 days
Exercisable options, weighted average exercise price $ 7.61
$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 4.38
Exercise price, upper limit $ 12.40
Outstanding options | shares 3,713
Exercisable options | shares 2,664
Outstanding options, remaining life in years 4 years 10 months 24 days
Exercisable options, remaining life in years 4 years 10 months 24 days
Exercisable options, weighted average exercise price $ 7.53
$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 12.40
Exercise price, upper limit $ 13.38
Outstanding options | shares 198
Exercisable options | shares 38
Outstanding options, remaining life in years 8 years 4 months 24 days
Exercisable options, remaining life in years 8 years 1 month 6 days
Exercisable options, weighted average exercise price $ 13.25