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
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, 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 $ 327,094 $ 221,957
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (4,535) (503)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 688 146
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (96) (8)
Available for sale securities continuous unrealized loss position, fair value 327,782 222,103
Available for sale securities continuous unrealized loss position, gross unrealized loss (4,631) (511)
U.S. Treasuries [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 162,281 103,019
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (1,852) (297)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 0 0
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss 0 0
Available for sale securities continuous unrealized loss position, fair value 162,281 103,019
Available for sale securities continuous unrealized loss position, gross unrealized loss (1,852) (297)
U.S. Government Sponsored Entities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 506 115
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (27) (3)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 96 0
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (16) 0
Available for sale securities continuous unrealized loss position, fair value 602 115
Available for sale securities continuous unrealized loss position, gross unrealized loss (43) (3)
Corporate debt [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 157,965 115,908
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (2,225) (173)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 592 146
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss (80) (8)
Available for sale securities continuous unrealized loss position, fair value 158,557 116,054
Available for sale securities continuous unrealized loss position, gross unrealized loss (2,305) (181)
ABS and other [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities continuous unrealized loss position for less than 12 months, fair value 6,342 2,915
Available for sale securities continuous unrealized loss position for less than 12 months, gross unrealized loss (431) (30)
Available for sale securities continuous unrealized loss position for 12 months or longer, fair value 0 0
Available for sale securities continuous unrealized loss position for 12 months or longer, gross unrealized loss 0 0
Available for sale securities continuous unrealized loss position, fair value 6,342 2,915
Available for sale securities continuous unrealized loss position, gross unrealized loss $ (431) $ (30)