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Investments (Tables)
3 Months Ended
Mar. 31, 2025
Investments [Abstract]  
Investments in Marketable Equity Securities Investments in marketable equity securities consist of the following:
  As of
March 31,
2025
December 31,
2024
(in thousands)
Total cost
$231,976 $227,153 
Gross unrealized gains
684,754 627,760 
Gross unrealized losses(15,671)(2,479)
Total Fair Value
$901,059 $852,434