Equity Compensation Plans (Share-Based Compensation Expense Related To Employee Share-Based Compensation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	$ 28,771	$ 28,078	$ 22,642
Restricted Stock Awards & Time-Based Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	18,633	18,727	18,612
Performance Share Awards
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	8,731	8,095	2,921
ESPP
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	1,407	1,256	1,109
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	1,868	2,243	1,425
Research and development expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	4,544	4,206	3,530
Selling, general and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	$ 22,359	$ 21,629	$ 17,687