Description of the Business and Significant Accounting Policies - Short-term Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Description of the Business and Significant Accounting Policies
Interest Income from invested cash and short-term investments	$ 20,600	$ 25,500	$ 46,900	$ 51,500
Short-term investments	$ 418,367		$ 418,367		$ 721,210