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Investments (Tables)
 6 Months Ended
Jun. 30, 2024
Investments [Abstract]  
Investments in Marketable Equity Securities Investments in marketable equity securities consist of the following:
  As of
June 30,
2024		December 31,
2023
(in thousands)
Total cost
$225,889 $225,971 
Gross unrealized gains
587,555 464,182 
Total Fair Value
$813,444 $690,153 
Gain on Marketable Equity Securities
The net gain on marketable equity securities comprised the following:

Three Months Ended 
 June 30

Six Months Ended 
 June 30
(in thousands)
2024202320242023
Gain on marketable equity securities, net
$19,628 $78,648 $123,780 $96,670 
Less: Net gains in earnings from marketable equity securities sold and donated
(102)(9,132)(102)(5,475)
Net unrealized gains in earnings from marketable equity securities still held at the end of the period
$19,526 

$69,516 

$123,678 $91,195