Business Segment Reporting - Narrative (Details) |
Dec. 31, 2018
a
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|---|---|
| West Texas | 听 |
| Segment Reporting Information [Line Items] | 听 |
| Area of land (in acres) | 900,000 |
| X | ||||||||||
- Definition Area of land held. No definition available.
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| X | ||||||||||
- 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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| X | ||||||||||
- Details
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