Subsequent Events - Additional Information (Details) - USD ($)
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3 Months Ended |
9 Months Ended |
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Oct. 18, 2018 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Dec. 31, 2017 |
| Subsequent Event [Line Items] |
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| Debt instrument principal amount |
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$ 903,194,000
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$ 889,790,000
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| 9.75% Senior Second Lien Notes, Due November 2023 | Prior to November 1, 2020 |
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| Subsequent Event [Line Items] |
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| Redemption description |
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Prior to November 1, 2020, we may redeem all or any portion of the Senior Second Lien Notes at a redemption price equal to 100% of the principal amount of the outstanding Senior Second Lien Notes plus accrued and unpaid interest, if any, to the redemption date, plus the “Applicable Premium” (as defined in the Indenture). In addition, prior to November 1, 2020, we may, at our option, on one or more occasions redeem up to 35% of the aggregate original principal amount of the Senior Second Lien Notes in an amount not greater than the net cash proceeds from certain equity offerings at a redemption price of 109.750% of the principal amount of the outstanding Senior Second Lien Notes plus accrued and unpaid interest, if any, to the redemption date.
On and after November 1, 2020, we may redeem the Senior Second Lien Notes, in whole or in part, at redemption prices (expressed as percentages of the principal amount thereof) equal to 104.875% for the 12-month period beginning November 1, 2020, 102.438% for the 12-month period beginning November 1, 2021, and 100.000% on November 1, 2022 and thereafter, plus accrued and unpaid interest, if any, to the redemption date. The Senior Second Lien Notes are guaranteed by Energy VI and W & T Energy VII, LLC (together, the “Guarantor Subsidiaries”). If we experience certain change of control events, we will be required to offer to repurchase the notes at 101.000% of the principal amount, plus accrued and unpaid interest, if any, to the repurchase date.
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| Revolving Bank Credit Facility Due October 2022 | Scenario, Forecast |
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| Subsequent Event [Line Items] |
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| Leverage ratio |
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300.00%
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325.00%
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325.00%
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350.00%
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350.00%
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| Revolving Bank Credit Facility Due October 2022 | Two Quarters After Material Acquisition |
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| Subsequent Event [Line Items] |
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| Leverage ratio |
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350.00%
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| Subsequent Event |
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| Subsequent Event [Line Items] |
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| Investment in Second Lien Term Loan |
$ 5,000,000
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| Subsequent Event | 9.75% Senior Second Lien Notes, Due November 2023 |
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| Subsequent Event [Line Items] |
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| Debt instrument principal amount |
$ 625,000,000
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| Debt instrument interest rate |
9.75%
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| Debt instrument maturity date |
Nov. 01, 2023
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| Debt instrument payment terms |
Interest on the Senior Second Lien Notes is payable in arrears on May 1 and November 1 of each year, beginning on May 1, 2019.
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| Senior second lien notes repurchase price limit percentage |
101.00%
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| Krohn entities purchase of Senior Second Lien Notes |
$ 8,000,000
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| Customary covenants payment default aggregate amount |
50,000,000
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| Customary covenants final judgment aggregate amount |
50,000,000
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| Customary covenants collateral fair value amount |
$ 25,000,000
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| Subsequent Event | 9.75% Senior Second Lien Notes, Due November 2023 | Prior to November 1, 2020 |
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| Subsequent Event [Line Items] |
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| Redemption price percentage of principal amount plus accrued and unpaid interest |
100.00%
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| Redemption price percentage of principal amount plus accrued and unpaid interest redeemable upon proceeds from equity offering |
109.75%
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| Subsequent Event | 9.75% Senior Second Lien Notes, Due November 2023 | Prior to November 1, 2020 | Maximum |
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| Subsequent Event [Line Items] |
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| Redemption price percentage |
35.00%
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| Subsequent Event | 9.75% Senior Second Lien Notes, Due November 2023 | 12-month Period Beginning November 1, 2020 |
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| Subsequent Event [Line Items] |
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| Redemption price percentage of principal amount plus accrued and unpaid interest |
104.875%
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| Subsequent Event | 9.75% Senior Second Lien Notes, Due November 2023 | 12-month Period Beginning November 1, 2021 |
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| Subsequent Event [Line Items] |
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| Redemption price percentage of principal amount plus accrued and unpaid interest |
102.438%
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| Subsequent Event | 9.75% Senior Second Lien Notes, Due November 2023 | On November 1, 2022 and Thereafter |
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| Subsequent Event [Line Items] |
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| Redemption price percentage of principal amount plus accrued and unpaid interest |
100.00%
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 |
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| Subsequent Event [Line Items] |
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| Credit agreement expiration date |
Oct. 18, 2022
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| Initial borrowing base and lending commitment |
$ 250,000,000
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| Estimated derivative contracts projected date |
Dec. 02, 2018
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| Estimated derivative contracts projected production period |
18 months
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| Revolving bank credit facility borrowings outstanding |
$ 61,000,000
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| Letters of credit outstanding |
9,700,000
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| Remaining availability |
179,300,000
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 | Letters of Credit |
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| Subsequent Event [Line Items] |
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| Revolving bank credit facility maximum lender commitment |
$ 30,000,000
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 | Maximum |
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| Subsequent Event [Line Items] |
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| Unused portion of the borrowing base commitment fee |
0.50%
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 | Maximum | Eurodollar |
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| Subsequent Event [Line Items] |
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| Debt instrument, basis spread on variable rate |
3.50%
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 | Maximum | Alternate Base Rate |
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| Subsequent Event [Line Items] |
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| Debt instrument, basis spread on variable rate |
2.50%
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 | Minimum |
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| Subsequent Event [Line Items] |
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| Credit agreement, current ratio |
100.00%
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| Unused portion of the borrowing base commitment fee |
0.375%
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| Estimated percenatge of derivative contracts |
50.00%
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 | Minimum | Eurodollar |
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| Subsequent Event [Line Items] |
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| Debt instrument, basis spread on variable rate |
2.50%
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| Subsequent Event | Revolving Bank Credit Facility Due October 2022 | Minimum | Alternate Base Rate |
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| Subsequent Event [Line Items] |
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| Debt instrument, basis spread on variable rate |
1.50%
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| Subsequent Event | 2018 Refinancing Transaction |
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| Subsequent Event [Line Items] |
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| Expected gain on refinancing transation |
$ 47,000,000
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| Expected additional capitalized financing fees |
$ 17,900,000
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