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	Dec. 31, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Line Items]
1 Year or Less	$ 355,452
Greater than 1 Year	102,894
Total	458,346	$ 539,798
Cash and money market funds [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	22,726
Greater than 1 Year	2,405
Total	25,131	46,367
Commercial Paper [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	16,360
Greater than 1 Year	0
Total	16,360	129,698
Corporate Notes and Bonds [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	130,423
Greater than 1 Year	44,554
Total	174,977	271,210
Municipal Bonds [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	4,947
Greater than 1 Year	0
Total	4,947	9,632
US government and agency [Member]
Cash and Cash Equivalents [Line Items]
1 Year or Less	180,996
Greater than 1 Year	55,935
Total	$ 236,931	$ 82,891