Business Segment Reporting (Details) a in Thousands  | 
 Sep. 30, 2020  
a 
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| West Texas | |
| Segment Reporting Information [Line Items] | |
| Area of land (in acres) | 880 | 
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- Definition Area of land held. No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Details 
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