Cash, Cash Equivalents, and Marketable Securities - Unrealized Positions for Marketable Securities (Details) - US Treasury Securities [Member] $ in Thousands	Jun. 30, 2025 USD ($)
Marketable Securities [Abstract]
U.S. Treasury securities, available-for-sale, Amortized cost	$ 1,802,565
U.S. Treasury securities, available-for-sale, Gross unrealized gains	654
U.S. Treasury securities, available-for-sale, Gross unrealized losses	(184)
U.S. Treasury securities, available-for-sale, Fair value	1,803,035
U.S. Treasury securities, held-to-maturity, Amortized cost	1,461,657
U.S. Treasury securities, held-to-maturity, Gross unrealized gains	211
U.S. Treasury securities, held-to-maturity, Gross unrealized losses	(603)
U.S. Treasury securities, held-to-maturity, Fair value	1,461,265
Amortized cost	3,264,222
Gross unrealized gains	865
Gross unrealized losses	(787)
Fair value	$ 3,264,300

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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Fair value of investment in debt security measured at amortized cost (held-to-maturity) and 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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