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Equity Compensation Plans (Share-Based Compensation Expense Related To Employee Share-Based Compensation) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total | $ 7,001 | $ 6,794 | $ 21,574 | $ 20,539
Cost of revenue |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total | 405 | 622 | 1,463 | 1,639
Research and development expenses |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total | 1,115 | 1,077 | 3,431 | 3,097
Selling, general and administrative expenses |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total | $ 5,481 | $ 5,095 | $ 16,680 | $ 15,803

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