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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Hierarchy of Fair Value, Assets and Liabilities Measured on Recurring Basis The following tables set forth by level within the fair value hierarchy the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis:
 Fair value at December 31, 2021
 Level 1Level 2Level 3Total
 (In thousands)
Assets:
Commodity derivative instruments (see Note 11)
$— $55 $— $55 
Total assets$— $55 $— $55 
Liabilities:
Commodity derivative instruments (see Note 11)
$— $204,729 $— $204,729 
Total liabilities$— $204,729 $— $204,729 
 Fair value at December 31, 2020
 Level 1Level 2Level 3Total
 (In thousands)
Assets:
Commodity derivative instruments (see Note 11)
$— $467 $— $467 
Total assets$— $467 $— $467 
Liabilities:
Commodity derivative instruments (see Note 11)
$— $94,558 $— $94,558 
Total liabilities$— $94,558 $— $94,558