Quarterly report pursuant to Section 13 or 15(d)

Investments in Marketable Debt Securities, Available-for-Sale - Schedule of Amortized Cost and Fair Value of Marketable Securities, Available-for-Sale, by Contractual Maturity (Detail)

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Investments in Marketable Debt Securities, Available-for-Sale - Schedule of Amortized Cost and Fair Value of Marketable Securities, Available-for-Sale, by Contractual Maturity (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Amortized Cost    
Due in one year or less $ 198,847 $ 169,018
Due after one year through five years 38,336 48,241
Due after five years through ten years 11,709 12,950
Due after ten years 9,257 8,347
Amortized Cost 258,149 238,556
Fair Value    
Due in one year or less 198,314 168,881
Due after one year through five years 37,491 47,200
Due after five years through ten years 10,997 12,279
Due after ten years 8,912 7,980
Fair Value $ 255,714 $ 236,340
Weighted average contractual maturity 1 year 9 months 18 days 1 year 10 months 24 days