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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
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