Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Fair value (Details)

v3.19.2
Derivative Instruments - Fair value (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
Mar. 31, 2019
item
Dec. 31, 2018
USD ($)
item
Fair value of derivative instruments      
Current portion of fair value of derivative assets $ 346,894   $ 245,263
Noncurrent portion of fair value of derivative assets 369,548   362,169
Current portion of fair value of derivative liabilities 274   532
Commodity derivative      
Fair value of derivative instruments      
Total asset derivatives 716,442   607,432
Total liability derivatives 274   532
Derivatives not designated as hedges for accounting purposes      
Fair value of derivative instruments      
Total asset derivatives 716,442   607,432
Total liability derivatives 274   532
Net derivatives 716,168   606,900
Derivatives not designated as hedges for accounting purposes | Commodity derivative      
Fair value of derivative instruments      
Current portion of fair value of derivative assets 346,894   245,263
Noncurrent portion of fair value of derivative assets 369,548   362,169
Current portion of fair value of derivative liabilities $ 274   $ 532
Derivatives designated as hedges for accounting purposes      
Fair value of derivative instruments      
Number of derivative instruments held designated as hedges | item   0 0