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)

v3.22.2.2
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
Sep. 30, 2022
Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value $ 261,357 $ 221,957
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (5,424) (503)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 25,520 146
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (1,261) (8)
Available for sale securities continuous unrealized loss position, fair value 286,877 222,103
Available for sale securities continuous unrealized loss position, gross unrealized loss (6,685) (511)
U.S. treasuries    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 143,148 103,019
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (2,042) (297)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 20,766 0
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (532) 0
Available for sale securities continuous unrealized loss position, fair value 163,914 103,019
Available for sale securities continuous unrealized loss position, gross unrealized loss (2,574) (297)
U.S. government sponsored entities    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 453 115
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (55) (3)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 88 0
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (21) 0
Available for sale securities continuous unrealized loss position, fair value 541 115
Available for sale securities continuous unrealized loss position, gross unrealized loss (76) (3)
Corporate debt    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 110,806 115,908
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (2,793) (173)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 4,454 146
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (665) (8)
Available for sale securities continuous unrealized loss position, fair value 115,260 116,054
Available for sale securities continuous unrealized loss position, gross unrealized loss (3,458) (181)
Asset-backed securities (“ABS”) and other    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 6,950 2,915
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (534) (30)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 212 0
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (43) 0
Available for sale securities continuous unrealized loss position, fair value 7,162 2,915
Available for sale securities continuous unrealized loss position, gross unrealized loss $ (577) $ (30)