Quarterly report pursuant to Section 13 or 15(d)

Impact of Derivative Activities on Condensed Consolidated Statements of Income (Details)

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Impact of Derivative Activities on Condensed Consolidated Statements of Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments $ (6,683) $ 0
Derivatives 151,119 (68,017)
Gain (Loss) on Commodity Derivative Instruments 157,802 (68,017)
Cash Settlements Interest Rate Swap Operating Activities 68 0
Cash Settlements Commodity Operating Activities (337) 4,394
Cash settlements, net $ (269) $ 4,394