v3.8.0.1

Derivative Instruments and Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Commodity Derivatives Volumes and Prices | At December 31, 2017, we had the following commodity derivatives positions outstanding:
Commodity and Period |  | Contract Type |  | Volume Transacted |  | Contract Price
Crude Oil |  |  |  |  |  |
January 2018 — December 2018 |  | Swap |  | 300 Bbls/day |  | $50.00/Bbl
January 2018 — March 2018 |  | Collar |  | 1,000 Bbls/day |  | $50.00/Bbl - $55.05/Bbl
January 2018 — June 2018 |  | Collar |  | 500 Bbls/day |  | $55.00/Bbl - $60.00/Bbl
Natural Gas |  |  |  |  |  |
January 2018 — December 2018 |  | Swap |  | 200,000 MMBtu/month |  | $3.085/MMBtu
January 2018 — December 2018 |  | Swap |  | 250,000 MMBtu/month |  | $3.084/MMBtu
NGLs (C3 - Propane) |  |  |  |  |  |
January 2018 — March 2018 |  | Swap |  | 450 Bbls/day |  | $30.24/Bbl
NGLs (IC4 - Isobutane) |  |  |  |  |  |
January 2018 — March 2018 |  | Swap |  | 50 Bbls/day |  | $36.12/Bbl
NGLs (NC4 - Butane) |  |  |  |  |  |
January 2018 — March 2018 |  | Swap |  | 150 Bbls/day |  | $35.70/Bbl
After December 31, 2017, we entered into the following commodity derivative positions:
Commodity and Period |  | Contract Type |  | Volume Transacted |  | Contract Price
Crude Oil |  |  |  |  |  |
January 2018 — September 2018 |  | Swap |  | 700 Bbls/day |  | $60.50/Bbl
April 2018 — September 2018 |  | Swap |  | 800 Bbls/day |  | $60.50/Bbl
NGLs (C2 - Ethane) |  |  |  |  |  |
February 2018 — December 2018 |  | Swap |  | 1,000 Bbls/day |  | $11.424/Bbl
NGLs (C3 - Propane) |  |  |  |  |  |
February 2018 — December 2018 |  | Swap |  | 600 Bbls/day |  | $32.991/Bbl
NGLs (IC4 - Isobutane) |  |  |  |  |  |
February 2018 — December 2018 |  | Swap |  | 50 Bbls/day |  | $38.262/Bbl
NGLs (NC4 - Butane) |  |  |  |  |  |
February 2018 — December 2018 |  | Swap |  | 200 Bbls/day |  | $38.22/Bbl
NGLs (C5 - Pentane) |  |  |  |  |  |
January 2018 — December 2018 |  | Swap |  | 200 Bbls/day |  | $56.364/Bbl
Summary of Fair Value of Open Commodity Derivatives | The following summarizes the fair value of our open commodity derivatives as of December 31, 2017 and 2016 (in thousands):
|  | Balance Sheet Location |  | Fair Value |
|  |  |  | December 31, 2017 |  |  | December 31, 2016 |
Derivatives not designated as hedging instruments |  |  |  |  |  |  |  |  |  |
Commodity derivatives |  | Derivative assets |  | $ | 1,398 |  |  | $ | — |
Commodity derivatives |  | Derivative liabilities |  |  | (2,181 | ) |  |  | (4,880 | )
Summary of Cash Settlements and Change in Fair Value of Commodity Derivatives | The following summarizes the cash settlements and change in the fair value of our commodity derivatives (in thousands):
|  |  |  | Year Ended December 31, |
|  |  |  | 2017 |  |  | 2016 |  |  | 2015 |
Derivatives not designated as hedging instruments |  |  |  |  |  |  |  |  |  |  |  |
Commodity derivatives |  | Net cash (payment) receipt on derivative settlements |  | $ | (4,359 | ) |  | $ | 6,132 |  |  | $ | 52,489 |
|  | Non-cash fair value gain (loss) on derivatives |  |  | 4,097 |  |  |  | (11,616 | ) |  |  | (33,214 | )
|  | Commodity derivative (loss) gain |  | $ | (262 | ) |  | $ | (5,484 | ) |  | $ | 19,275 |
Summary of Financial Instruments Not Recorded at Fair Value | The following table sets forth the fair values of financial instruments that are not recorded at fair value on our financial statements (in thousands).
|  | December 31, 2017 |
|  | Carrying Amount |  |  | Fair Value |
Senior Notes, net |  | $ | 84,185 |  |  | $ | 74,798 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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- Definition Tabular disclosure for other derivative instruments not designated as hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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