Annual report pursuant to Section 13 and 15(d)

Derivative Instruments - Schedule of Derivative Instruments in Statement of Financial Position (Details)

v3.20.4
Derivative Instruments - Schedule of Derivative Instruments in Statement of Financial Position (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]    
Total short-term derivative instruments – asset $ 27,146 $ 126,201
Total long-term derivative instruments – asset 322 563
Total short-term derivative instruments – liability 11,641 303
Total long-term derivative instruments – liability 36,604 53,135
Commodity derivative instruments    
Derivative [Line Items]    
Total short-term derivative instruments – asset 27,146 125,383
Total long-term derivative instruments – asset 322 0
Contingent consideration arrangement    
Derivative [Line Items]    
Total short-term derivative instruments – asset 0 818
Total long-term derivative instruments – asset $ 0 $ 563