Description of the Business and Summary of Significant Accounting Policies (Short-term Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Short Term Investments [Line Items]
Interest Income from invested cash and short-term investments	$ 111,900	$ 29,300
Short-term investments	721,210	628,215
Certificates of Deposit [Member]
Short Term Investments [Line Items]
Short-term investments	10,100
Commercial Paper [Member]
Short Term Investments [Line Items]
Short-term investments	146,200	145,700
US Treasury Securities [Member]
Short Term Investments [Line Items]
Short-term investments	$ 564,900	$ 482,500