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Shareholders' Equity And Stock-Based Compensation (Summary Of Stock Option Activity) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
6 Months Ended
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Outstanding 874
Number of Shares, Awards granted 100
Number of Shares, Awards exercised or vested (97)
Number of Shares, Outstanding 877
Number of Shares, Exercisable 682
Number of Shares, Available for future grant at beginning of period 183
Number of Shares, Available for future grant at end of period 114
Weighted-average Exercise Price, Outstanding [1] $ 6.39
Weighted-average Exercise Price, Awards exercised or vested [1] 4.31
Weighted-average Exercise Price, Outstanding [1] 6.52
Weighted-average Exercise Price, Exercisable [1] $ 6.50
Aggregate Intrinsic Value, Outstanding $ 7,271
Aggregate Intrinsic Value, Exercisable $ 5,247
Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Outstanding 746
Number of Shares, Awards exercised or vested (42)
Number of Shares, Outstanding 704
Number of Shares, Exercisable 682
Restricted Stock Units (RSUs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Outstanding 128
Number of Shares, Awards granted 100
Number of Shares, Awards exercised or vested (55)
Number of Shares, Outstanding 173
Number of Shares, Exercisable 34
[1] The weighted average exercise price calculation does not include outstanding RSUs