Annual report pursuant to Section 13 and 15(d)

Derivative Instruments - Fair value (Details)

v3.19.3.a.u2
Derivative Instruments - Fair value (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
item
Dec. 31, 2018
USD ($)
item
Fair value of derivative instruments    
Current portion of fair value of derivative assets $ 422,849 $ 245,263
Noncurrent portion of fair value of derivative assets 333,174 362,169
Current portion of fair value of derivative liabilities 6,721 532
Noncurrent portion of fair value of derivative liabilities 3,519  
Commodity derivative    
Fair value of derivative instruments    
Total asset derivatives 756,023 607,432
Total liability derivatives 10,240 532
Derivatives not designated as hedges for accounting purposes    
Fair value of derivative instruments    
Total asset derivatives 756,023 607,432
Total liability derivatives 10,240 532
Derivatives not designated as hedges for accounting purposes | Commodity derivative    
Fair value of derivative instruments    
Current portion of fair value of derivative assets 422,849 245,263
Noncurrent portion of fair value of derivative assets 333,174 362,169
Current portion of fair value of derivative liabilities 6,721 $ 532
Noncurrent portion of fair value of derivative liabilities $ 3,519  
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 $ 745,783 $ 606,900