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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2024
Fair Value Measurements  
Summary of Financial Assets and Liabilities Accounted for at Fair Value

March 31, 2024

    

Total

    

Level 1

    

Level 2

    

Level 3

(In thousands)

Assets:

 

  

 

  

 

  

 

  

Investments in marketable securities

$

34,252

$

31,296

$

2,956

$

Fund for asset retirement obligations

144,146

144,146

Total assets

$

178,398

$

175,442

$

2,956

$