Cash, Cash Equivalents, Restricted Cash And Investments - Schedule of Contractual Maturity Date of Cash Cash Equivalents, Restricted Cash and Investments in Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Line Items]
1 Year or Less	$ 588,356
Greater than 1 Year	111,470
Total	699,826	$ 366,281
Cash and money market funds [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	22,262
Greater than 1 Year	2,609
Total	24,871	33,204
Corporate Notes and Bonds [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	13,932
Greater than 1 Year	0
Total	13,932	45,792
US Government Corporations and Agencies Securities [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	552,162
Greater than 1 Year	108,861
Total	$ 661,023	$ 287,285