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Debt - Additional Information (Details) - Credit Facility - Revolving Credit Facility - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Apr. 30, 2020
Debt Instrument |  |
Debt outstanding | $ 46,000,000.0 |
Outstanding letters of credit | 2,900,000 |
Maximum borrowing capacity | 600,000,000.0 |
Borrowing base | $ 225,000,000.0 |
Commitment fee | 0.50% |
Average interest rate during period | 3.70% |
Percentage of proved reserves pledged as collateral | 85.00% |
Total net leverage ratio (no greater than) | 3.50 |
Interest coverage ratio (no less than) | 2.25 |
Leverage ratio | 0.34 |
Coverage ratio | 29.61 |
Minimum | LIBOR |  |
Debt Instrument |  |
Basis spread on variable rate | 2.00% |
Minimum | Base Rate |  |
Debt Instrument |  |
Basis spread on variable rate | 1.00% |
Maximum | LIBOR |  |
Debt Instrument |  |
Basis spread on variable rate | 3.00% |
Maximum | Base Rate |  |
Debt Instrument |  |
Basis spread on variable rate | 2.00% |
Subsequent Event |  |
Debt Instrument |  |
Borrowing base |  | $ 75,000,000.0

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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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