Investments and Fair Value Measurements - Available-For-Sale Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 6,770,451	$ 5,720,869
Unrealized Gains	957	9,158
Unrealized Losses	(14,674)	(135)
Fair Value	6,756,734	5,729,892
U.S. Treasury securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	6,770,451	5,720,869
Unrealized Gains	957	9,158
Unrealized Losses	(14,674)	(135)
Fair Value	$ 6,756,734	$ 5,729,892

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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