Annual report pursuant to Section 13 and 15(d)

Derivative Instruments - Gain (Loss) on Derivative Instruments (Details)

v3.19.3.a.u2
Derivative Instruments - Gain (Loss) on Derivative Instruments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Derivative [Line Items]      
Net gain (loss) on natural gas, oil, and NGL derivatives $ 208,360 $ (123,479) $ 213,679
Natural gas derivatives      
Derivative [Line Items]      
Net gain (loss) on natural gas, oil, and NGL derivatives 194,450 (116,130) 232,143
Oil derivatives      
Derivative [Line Items]      
Net gain (loss) on natural gas, oil, and NGL derivatives 7,035 (13,084) (3,350)
NGL derivatives      
Derivative [Line Items]      
Net gain (loss) on natural gas, oil, and NGL derivatives 6,632 5,735 (15,114)
Contingent consideration arrangement      
Derivative [Line Items]      
Net gain (loss) on natural gas, oil, and NGL derivatives $ 243 $ 0 $ 0