Annual report pursuant to Section 13 and 15(d)

Accounts Receivable and Major Customers - Summary of Accounts Receivable (Detail)

v3.20.4
Accounts Receivable and Major Customers - Summary of Accounts Receivable (Detail) - USD ($)
$ in Thousands
4 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Cost of Goods and Services Sold   $ 22,050 $ 23,197 $ 18,626
Net Income (Loss) Available to Common Stockholders, Basic $ 224,785 (310,557) 70,589 224,785
Customers   39,672 63,165  
Joint interest partners   3,079 6,929  
Other   8 674  
Accounts Receivable, Gross, Current, Total   42,759 70,768  
Less: Allowance for credit losses   (197) (52)  
Accounts receivable, net of allowance for doubtful accounts   42,562 70,716  
Oil and Gas, Exploration and Production [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Revenue from contract with customer   251,741 434,713 402,485
Oil and Condensate [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Revenue from contract with customer   8,948 16,589 21,073
Natural Gas, Production [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Revenue from contract with customer   $ 10,103 $ 17,733 $ 15,972