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Properties and Equipment Midstream Asset Divestiture (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Long Lived Assets Held-for-sale [Line Items]      
Proceeds from Divestiture of Businesses, Net of Cash Divested $ 82,000    
Residual Proceeds Allocated to Acreage Dedication Agreements 179,600    
Gain (Loss) on Disposition of Property Plant Equipment   $ 353 $ 34,273
Midstream Asset Divestitures [Member]      
Long Lived Assets Held-for-sale [Line Items]      
Proceeds from Sales of Assets, Investing Activities $ 345,600    
Midstream Gas Gathering [Member]      
Long Lived Assets Held-for-sale [Line Items]      
Gain (Loss) on Disposition of Other Assets     $ 34,000