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Investments (Schedule of Contractual Maturities of Cash Equivalents and Available-for-Sale Debt Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	$ 493,164
After 1 year through 5 years, amortized cost	158,482
Total, amortized cost	726,061	$ 581,367
Within 1 year, fair value	493,511
After 1 year through 5 years, fair value	158,514
Total, fair value	725,554	$ 581,573
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Asset-backed securities, amortized cost	74,415
Asset-backed securities, fair value	$ 73,529

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