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v3.19.2

Debt - Additional Information (Details) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 21, 2019 | Jun. 20, 2019 | Feb. 28, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Debt Instrument |  |  |  |  |  |  |
Repayments of borrowings |  |  |  |  |  | $ 60,596,000 | $ 36,304,000
Gain on extinguishment of debt |  |  |  | $ 0 | $ 0 | 0 | 1,151,000
Credit Facility | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |
Maximum borrowing capacity | $ 600,000,000.0 | $ 350,000,000.0 |  |  |  |  |
Borrowing base | $ 300,000,000.0 |  |  |  |  |  |
Lender party commitments |  |  |  | $ 270,000,000.0 |  | $ 270,000,000.0 |
Commitment fee |  |  |  |  |  | 0.50% |
Percentage of proved reserves pledged as collateral |  | 95.00% |  | 85.00% |  | 85.00% |
Total net leverage ratio (no greater than) |  |  |  | 3.50 |  | 3.50 |
Interest coverage ratio (no less than) |  |  |  | 2.25 |  | 2.25 |
Leverage ratio |  |  |  | 0.25 |  | 0.25 |
Coverage ratio |  |  |  | 63.13 |  | 63.13 |
Debt outstanding |  |  |  | $ 52,000,000.0 |  | $ 52,000,000.0 |
Outstanding letters of credit |  |  |  | $ 7,600,000 |  | $ 7,600,000 |
Credit Facility | Revolving Credit Facility | Minimum | LIBOR |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |
Basis spread on variable rate | 2.00% | 3.00% |  |  |  |  |
Credit Facility | Revolving Credit Facility | Minimum | Base Rate |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |
Basis spread on variable rate | 1.00% | 2.00% |  |  |  |  |
Credit Facility | Revolving Credit Facility | Maximum | LIBOR |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |
Basis spread on variable rate | 3.00% | 4.00% |  |  |  |  |
Credit Facility | Revolving Credit Facility | Maximum | Base Rate |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |
Basis spread on variable rate | 2.00% | 3.00% |  |  |  |  |
New Building Note | Secured Notes |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |
Repayments of borrowings |  |  | $ 36,300,000 |  |  |  |
Face amount of debt instrument |  |  | 35,000,000.0 |  |  |  |
Interest costs paid-in-kind |  |  | $ 1,300,000 |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  | $ 1,200,000

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