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Derivative Instruments - Schedule of Outstanding Commodity Derivative Instruments (Details) bbl in Thousands, MMBTU in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) MMBTU $ / bbl $ / MMBTU bbl
Derivative [Line Items]
Fair value asset | $	$ 43,685
Oil [Member] | 2017 Swaps [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	3,843
Average swap price (in dollars per barrel)	49.83
Fair value asset | $	$ 13,211
Oil [Member] | 2017 Two Way Collars [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	1,464
Average floor price (in dollars per barrel)	46.25
Average ceiling price (in dollars per barrel)	54.37
Fair value asset | $	$ 3,122
Oil [Member] | 2017 Three Way Collars [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	1,098
Average sub-floor price (in dollars per barrel)	31.67
Average floor price (in dollars per barrel)	45.83
Average ceiling price (in dollars per barrel)	59.94
Fair value asset | $	$ 1,816
Oil [Member] | 2018 Swaps [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	5,508
Average swap price (in dollars per barrel)	51.95
Fair value asset | $	$ 20,746
Oil [Member] | 2018 Two Way Collars [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	582
Average floor price (in dollars per barrel)	48.40
Average ceiling price (in dollars per barrel)	55.13
Fair value asset | $	$ 1,799
Oil [Member] | 2018 Three Way Collars [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	186
Average sub-floor price (in dollars per barrel)	31.67
Average floor price (in dollars per barrel)	45.83
Average ceiling price (in dollars per barrel)	59.94
Fair value asset | $	$ 452
Oil [Member] | 2019 Swaps [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	434
Average swap price (in dollars per barrel)	52.16
Fair value asset | $	$ 1,365
Oil [Member] | 2019 Two-way Collars [Member]
Derivative [Line Items]
Total ntional amount of oil (in Bbls) | bbl	31
Average floor price (in dollars per barrel)	50.00
Average ceiling price (in dollars per barrel)	55.70
Fair value asset | $	$ 104
Natural Gas [Member] | 2017 Swaps [Member]
Derivative [Line Items]
Total notional amount of natural gas (in MMBtu) | MMBTU	3,680
Average swap price (in dollars per barrel) | $ / MMBTU	3.32
Fair value asset | $	$ 827
Natural Gas [Member] | 2018 Swaps [Member]
Derivative [Line Items]
Total notional amount of natural gas (in MMBtu) | MMBTU	5,475
Average swap price (in dollars per barrel) | $ / MMBTU	3.04
Fair value asset | $	$ 243

X

- Definition

Derivative, Sub-Floor Price

+ References

No definition available.

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X

- 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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X

- Definition

The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

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X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611

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X

- 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.

+ References

No definition available.

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X

- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

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X

- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

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