Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details)

v3.21.2
Derivative Instruments and Hedging Activities - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Fair value of derivatives - current    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting $ 94,505 $ 21,156
Effects of Netting (79,564) (20,235)
As Presented with Effects of Netting 14,941 921
Fair value of derivatives - current | Contingent consideration arrangements    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting 14,685 0
Effects of Netting 0 0
As Presented with Effects of Netting 14,685 0
Fair value of derivatives - current | Commodity derivative instruments    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting 79,820 21,156
Effects of Netting (79,564) (20,235)
As Presented with Effects of Netting 256 921
Other assets, net    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting 5,850 1,816
Effects of Netting (5,850) 0
As Presented with Effects of Netting 0 1,816
Other assets, net | Contingent consideration arrangements    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting 0 1,816
Effects of Netting 0 0
As Presented with Effects of Netting 0 1,816
Other assets, net | Commodity derivative instruments    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting 5,850 0
Effects of Netting (5,850) 0
As Presented with Effects of Netting 0 0
Fair value of derivatives - current    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting (411,266) (117,295)
Effects of Netting 79,564 20,235
As Presented with Effects of Netting (331,702) (97,060)
Fair value of derivatives - current | Contingent consideration arrangements    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting (24,104) 0
Effects of Netting 0 0
As Presented with Effects of Netting (24,104) 0
Fair value of derivatives - current | Commodity derivative instruments    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting (387,162) (117,295)
Effects of Netting 79,564 20,235
As Presented with Effects of Netting (307,598) (97,060)
Financial guarantee contracts, deferred premium 8,300 11,200
Fair value of derivatives - non-current    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting (14,054) (88,046)
Effects of Netting 5,850 0
As Presented with Effects of Netting (8,204) (88,046)
Fair value of derivatives - non-current | Contingent consideration arrangements    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting 0 (8,618)
Effects of Netting 0 0
As Presented with Effects of Netting 0 (8,618)
Fair value of derivatives - non-current | Commodity derivative instruments    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting (14,054) 0
Effects of Netting 5,850 0
As Presented with Effects of Netting $ (8,204) 0
Fair value of derivatives - non-current | September 2020 Warrants liability    
Offsetting Assets and Liabilities [Line Items]    
Presented without Effects of Netting   (79,428)
Effects of Netting   0
As Presented with Effects of Netting   $ (79,428)