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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2023
Fair Value Measurements  
Summary of Financial Assets and Liabilities Accounted for at Fair Value

March 31, 2023

    

Total

    

Level 1

    

Level 2

    

Level 3

(In thousands)

Assets:

 

  

 

  

 

  

 

  

Investments in marketable securities

$

32,116

$

25,388

$

6,728

$

Derivatives

 

4,628

 

 

3,527

 

1,101

Fund for asset retirement obligations

137,134

137,134

Total assets

$

173,878

$

162,522

$

10,255

$

1,101

Liabilities:

 

 

 

 

Derivatives

$

$

$

$

Summary of Change in the Fair Values of Financial Instruments Categorized as Level 3

Three Months Ended March 31, 2023

Three Months Ended March 31, 2022

(In thousands)

Balance, beginning of period

$

1,300

$

1,219

Realized and unrealized gains (losses) recognized in earnings, net

 

(1,282)

 

6,490

Purchases

 

1,575

 

998

Settlements

 

(492)

 

(160)

Ending balance

$

1,101

$

8,547