Quarterly report pursuant to Section 13 or 15(d)

Investments in Marketable Debt Securities, Available-for-Sale - Amortized Cost and Fair Value of Investments in Available for Sale Securities Unrealized Loss Position (Detail)

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Investments in Marketable Debt Securities, Available-for-Sale - Amortized Cost and Fair Value of Investments in Available for Sale Securities Unrealized Loss Position (Detail) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value $ 102,619 $ 56,934
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (171) (75)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 56,162 57,509
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (2,286) (2,560)
Available for sale securities continuous unrealized loss position, fair value 158,781 114,443
Available for sale securities continuous unrealized loss position, gross unrealized loss (2,457) (2,635)
U.S. treasuries    
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 28,678 9,982
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (3) (1)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 17,328 20,610
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (285) (415)
Available for sale securities continuous unrealized loss position, fair value 46,006 30,592
Available for sale securities continuous unrealized loss position, gross unrealized loss (288) (416)
U.S. government sponsored entities    
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 0 0
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss 0 0
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 453 488
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (71) (58)
Available for sale securities continuous unrealized loss position, fair value 453 488
Available for sale securities continuous unrealized loss position, gross unrealized loss (71) (58)
Corporate debt    
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 73,596 45,251
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (167) (59)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 32,937 30,423
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (1,613) (1,650)
Available for sale securities continuous unrealized loss position, fair value 106,533 75,674
Available for sale securities continuous unrealized loss position, gross unrealized loss (1,780) (1,709)
Asset-backed securities (“ABS”) and other    
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 345 1,701
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (1) (15)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 5,444 5,988
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (317) (437)
Available for sale securities continuous unrealized loss position, fair value 5,789 7,689
Available for sale securities continuous unrealized loss position, gross unrealized loss $ (318) $ (452)