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Earnings Per Share (Computation of basic and diluted earnings per share) (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2018
Numerator for basic and diluted earnings per share: |  |  |
Net income (loss) | $ (2,969) | $ 18,579 | $ 18,579
Denominators: |  |  |
Average basic shares outstanding | 23,802 | 23,431 |
Effect of dilutive employee stock options and other share-based awards | 0 | 346 |
Average diluted shares outstanding | 23,802 | 23,777 |

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