Marketable Securities - Summary of Available -for-sale Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Amortized Cost	$ 742,215	$ 964,768
Gross Unrealized Gains	62	0
Gross Unrealized Losses	(3,823)	(2,125)
Estimated Fair Value	738,454	962,643
U.S. Treasury and Other Government Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	244,562	301,493
Gross Unrealized Gains	62	0
Gross Unrealized Losses	(1,938)	(1,016)
Estimated Fair Value	242,686	300,477
Financial Institution Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	380,891	441,068
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,030)	(652)
Estimated Fair Value	379,861	440,416
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	102,059	62,500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(509)	(151)
Estimated Fair Value	101,550	62,349
Other Asset Backed Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	14,703	159,707
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(346)	(306)
Estimated Fair Value	$ 14,357	$ 159,401

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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