Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Fair value (Details)

v3.21.1
Derivative Instruments - Fair value (Details)
$ in Thousands
Mar. 31, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
item
Fair value of derivative instruments    
Current portion of fair value of derivative assets $ 41,356 $ 105,130
Noncurrent portion of fair value of derivative assets 43,240 47,293
Current portion of fair value of derivative liabilities 146,720 31,242
Noncurrent portion of fair value of derivative liabilities 98,944 99,172
Commodity derivative    
Fair value of derivative instruments    
Total asset derivatives 52,314 111,833
Total liability derivatives 245,664 130,414
Embedded derivatives    
Fair value of derivative instruments    
Total asset derivatives 32,282 40,590
Derivatives not designated as hedges for accounting purposes    
Fair value of derivative instruments    
Total asset derivatives 84,596 152,423
Total liability derivatives 245,664 130,414
Derivatives not designated as hedges for accounting purposes | Commodity derivative    
Fair value of derivative instruments    
Current portion of fair value of derivative assets 36,633 97,144
Noncurrent portion of fair value of derivative assets 15,681 14,689
Current portion of fair value of derivative liabilities 146,720 31,242
Noncurrent portion of fair value of derivative liabilities 98,944 99,172
Derivatives not designated as hedges for accounting purposes | Commodity derivative | VIE, Martica    
Fair value of derivative instruments    
Current portion of fair value of derivative liabilities 13,000 7,000
Noncurrent portion of fair value of derivative liabilities 10,000 7,000
Total liability derivatives 23,000 14,000
Derivatives not designated as hedges for accounting purposes | Embedded derivatives    
Fair value of derivative instruments    
Current portion of fair value of derivative assets 4,723 7,986
Noncurrent portion of fair value of derivative assets $ 27,559 $ 32,604
Derivatives designated as hedges for accounting purposes    
Fair value of derivative instruments    
Number of derivative instruments held designated as hedges | item 0 0
Net derivatives assets (liabilities) $ (161,068) $ 22,009