Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Details)

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Asset Retirement Obligations (Details) - Solaris Midstream Holdings, LLC and Subsidiaries - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Changes in asset retirement obligations    
Asset Retirement Obligations at January 1, $ 5,291 $ 3,375
Liabilities Incurred 533 738
Liabilities Incurred on Acquisition   776
Reduction for Assets Sold   (22)
Accretion Expense 208 179
Asset Retirement Obligations at September 30 $ 6,032 $ 5,046