|**Taxes Other Than Income Taxes (Tables)**   | 3 Months Ended                                                                                                                                                                                                             
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|**Taxes Other Than Income Taxes [Abstract]** |                                                                                                                                                                                                                            
|Components Of Taxes Other Than Income Taxes  | Three Months EndedMarch 31,20202019Property$7,033$6,466Gross receipts, excise and franchise3,1223,220Payroll4,2803,481Regulatory assessments700747Pumping fees1,081969Other22086Total taxes other than income$16,436$14,969
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|Property                                     |                                                                                                                                                                                                                            
|Gross receipts, excise and franchise         |                                                                                                                                                                                                                            
|Payroll                                      |                                                                                                                                                                                                                            
|Regulatory assessments                       |                                                                                                                                                                                                                            
|Pumping fees                                 |                                                                                                                                                                                                                            
|Other                                        |                                                                                                                                                                                                                            
|Total taxes other than income                |                                                                                                                                                                                                                            
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