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)

v3.23.3
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, 2023
Dec. 31, 2022
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value $ 102,582 $ 209,028
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (375) (3,501)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 83,917 79,003
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (4,167) (2,007)
Available for sale securities continuous unrealized loss position, fair value 186,499 288,031
Available for sale securities continuous unrealized loss position, gross unrealized loss (4,542) (5,508)
U.S. treasuries    
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 25,803 73,055
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (23) (1,232)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 43,677 66,144
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (829) (640)
Available for sale securities continuous unrealized loss position, fair value 69,480 139,199
Available for sale securities continuous unrealized loss position, gross unrealized loss (852) (1,872)
U.S. government sponsored entities    
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 0 447
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss 0 (46)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 472 87
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (88) (20)
Available for sale securities continuous unrealized loss position, fair value 472 534
Available for sale securities continuous unrealized loss position, gross unrealized loss (88) (66)
Corporate debt    
Marketable Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 71,514 130,816
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (255) (1,909)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 33,638 10,681
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (2,731) (1,063)
Available for sale securities continuous unrealized loss position, fair value 105,152 141,497
Available for sale securities continuous unrealized loss position, gross unrealized loss (2,986) (2,972)
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 5,265 4,710
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (97) (314)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 6,130 2,091
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (519) (284)
Available for sale securities continuous unrealized loss position, fair value 11,395 6,801
Available for sale securities continuous unrealized loss position, gross unrealized loss $ (616) $ (598)