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Investments and Fair Value Measurements - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Due within one year	$ 550,615
Due after one year through two years	123,950
Cost	674,565	$ 587,368
Due within one year	551,485
Due after one year through two years	124,219
Fair Value	$ 675,704	$ 587,096

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