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Other Matters (Details) - USD ($)
3 Months Ended 9 Months Ended
Nov. 30, 2018
Jul. 10, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from divestitures of businesses and investments, net   $ 889,800,000     $ 103,594,000 $ 292,117,000
Gain (loss) on disposition of assets     $ 36,246,000 $ 112,388,000 $ (71,077,000) $ 13,246,000
Water Solutions Bakken Business            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from divestitures of businesses and investments, net $ 91,000,000.0          
Gain (loss) on disposition of assets $ (35,700,000)          
Number of saltwater wells sold 5