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Common Stock and Stock-Based Awards (Summary Of Stock Options) (Details) - Employee Stock Option - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Number of Options, Outstanding, Beginning balance | 57 | 132 | 188
Number of Options, Exercised | (17) | (53) | (54)
Number of Options, Forfeited or expired | (3) | (22) | (2)
Number of Options, Outstanding, Ending balance | 37 | 57 | 132
Weighted-Average Exercise Price, Outstanding, Beginning balance | $ 21.85 | $ 20.06 | $ 19.98
Weighted-Average Exercise Price, Exercised | 19.52 | 17.16 | 19.77
Weighted-Average Exercise Price, Forfeited or expired | 20.11 | 22.36 | 20.16
Weighted-Average Exercise Price, Outstanding, Ending balance | $ 23.07 | $ 21.85 | $ 20.06
Weighted-Average Remaining Contractual Term (Years), Outstanding | 8 months 12 days |  |
Aggregate Intrinsic Value, Outstanding | $ 169 |  |

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