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Derivative Instruments - Schedule of Outstanding Commodity Derivative Instruments (Details) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
May 08, 2018 MMBTU $ / bbl bbl | Mar. 31, 2018 USD ($) MMBTU $ / bbl $ / MMBTU bbl
Derivative [Line Items] |  |
Fair value asset | $ |  | $ (169,357)
Crude Oil [Member] | 2018 Swaps [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl |  | 11,029,000
Average swap price (in dollars per barrel) |  | 51.92
Fair value asset | $ |  | $ (125,062)
Crude Oil [Member] | 2018 Two-way Collars [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl |  | 825,000
Average floor price (in dollars per barrel) |  | 48.67
Average ceiling price (in dollars per barrel) |  | 53.07
Fair value asset | $ |  | $ (8,649)
Crude Oil [Member] | 2019 Swaps [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl |  | 5,489,000
Average swap price (in dollars per barrel) |  | 53.05
Fair value asset | $ |  | $ (32,612)
Crude Oil [Member] | 2019 Two-way Collars [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl |  | 93,000
Average floor price (in dollars per barrel) |  | 48.67
Average ceiling price (in dollars per barrel) |  | 53.07
Fair value asset | $ |  | $ (812)
Crude Oil [Member] | 2019 Three-way Collars [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl |  | 2,004,000
Average sub-floor price (in dollars per barrel) |  | 40.00
Average floor price (in dollars per barrel) |  | 50.00
Average ceiling price (in dollars per barrel) |  | 65.99
Fair value asset | $ |  | $ (2,217)
Crude Oil [Member] | 2020 Swaps [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl |  | 403,000
Average swap price (in dollars per barrel) |  | 53.47
Fair value asset | $ |  | $ (1,261)
Crude Oil [Member] | 2020 Three-way Collars [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl |  | 186,000
Average sub-floor price (in dollars per barrel) |  | 40.00
Average floor price (in dollars per barrel) |  | 50.00
Average ceiling price (in dollars per barrel) |  | 65.99
Fair value asset | $ |  | $ (113)
Natural Gas [Member] | 2018 Swaps [Member] |  |
Derivative [Line Items] |  |
Total notional amount of natural gas (in MMBtu) | MMBTU |  | 6,325,000
Average swap price (in dollars per barrel) | $ / MMBTU |  | 3.05
Fair value asset | $ |  | $ 1,369
Subsequent Event [Member] | Crude Oil [Member] | 2018 Swaps [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl | 826,000 |
Average floor price (in dollars per barrel) | 56.79 |
Subsequent Event [Member] | Crude Oil [Member] | 2019 Swaps [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl | 1,641,000 |
Subsequent Event [Member] | Crude Oil [Member] | 2020 Swaps [Member] |  |
Derivative [Line Items] |  |
Total notional amount of oil (in Bbls) | bbl | 124,000 |
Subsequent Event [Member] | Natural Gas [Member] | 2018 Swaps [Member] |  |
Derivative [Line Items] |  |
Average floor price (in dollars per barrel) | 2.93 |
Subsequent Event [Member] | Natural Gas [Member] | 2018 Two-way Collars [Member] |  |
Derivative [Line Items] |  |
Total notional amount of natural gas (in MMBtu) | MMBTU | 1,104,000 |
Subsequent Event [Member] | Natural Gas [Member] | 2019 Three-way Collars [Member] |  |
Derivative [Line Items] |  |
Total notional amount of natural gas (in MMBtu) | MMBTU | 540,000 |

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- Definition The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. + References No definition available. + Details
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