Investments - Schedule of Contractual Maturities of Investments (Detail) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024
Schedule Of Investments [Line Items]
Available-for-sale investments, amortized cost basis, due in one year or less	[1]	$ 156,097
Available-for-sale investments, amortized Cost Basis, due after one year through five years		16,671
Available-for-sale Investments, amortized cost basis, Total		172,768
Available-for-sale investments, aggregate fair value, due in one year or less	[1]	156,150
Available-for-sale investments, aggregate fair value, due after one year through five years		16,681
Available-for-sale investments, aggregate fair value, Total		$ 172,831
Held-to-maturity investments, amortized cost basis, due in one year or less	[1]		$ 165,466
Held-to-maturity investments, amortized cost basis, due after one year through five years			5,498
Held-to-maturity investments, amortized cost basis, total			170,964
Held-to-maturity investments, aggregate fair value, due in one year or less	[1]		165,662
Held-to-maturity Investments, aggregate fair value, due after one year through five years			5,482
Held-to-maturity investments aggregate fair value, total			$ 171,144

[1] The investments due in one year or less include cash equivalents of $21.9 million as of March 31, 2025 and $14.7 million as of December 31, 2024.