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Financial Instruments (Tables)
 9 Months Ended
Sep. 30, 2024
Investments, All Other Investments [Abstract]  
Schedule of Investments
The following table presents our financial instruments:
September 30, 2024December 31, 2023
Cash and cash equivalents$538,296 $165,493 
Available-for-sale investments9,869 17,431 
Equity investments10,000 10,000 
Total$558,165 $192,924 
Schedule of Available-for-sale Activity
The following table presents the components of our available-for-sale investments:
September 30, 2024December 31, 2023
Amortized cost$10,088 $17,866 
Unrealized gains— — 
Unrealized losses(219)(435)
Estimated fair value$9,869 $17,431 
The following table presents the activity on our available-for-sale investments:
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Proceeds from sales and maturities$1,349 $8,345 $7,700 $45,452 
Realized gains (losses) on sales, net of tax
1 — 1 (1)