Derivative Financial Instruments - Additional Information (Details) |
Jun. 30, 2018
USD ($)
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| Derivatives Fair Value [Line Items] | |
| Derivative contract premiums | $ 1,582,000 |
| N Y M E X Crude Oil Swap | |
| Derivatives Fair Value [Line Items] | |
| Derivative contract premiums | 0 |
| NYMEX Crude Oil Two Way Collars | |
| Derivatives Fair Value [Line Items] | |
| Derivative contract premiums | 0 |
| Prepaid and Other Assets | NYMEX Crude Oil Puts | |
| Derivatives Fair Value [Line Items] | |
| Derivative contract premiums | $ 2,100,000 |
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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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- Definition Derivative contract premiums. No definition available.
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