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Exploration and Production Activities (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2016
Oil and Gas Exploration and Production Industries Disclosures [Abstract] |
Capitalized costs relating to oil and gas producing activities disclosure | The following table sets forth capitalized costs and accumulated depreciation, depletion and amortization related to oil and natural gas producing activities, prior to Fidelity's assets being held for sale, at December 31:
| 2014 |
| (In thousands)
Subject to amortization | $ | 3,205,036 |
Not subject to amortization | 132,141 |
Total capitalized costs | 3,337,177 |
Less accumulated depreciation, depletion and amortization | 1,752,566 |
Net capitalized costs | $ | 1,584,611 |
Cost incurred in oil and gas property acquisition, exploration, and development activities disclosure | Capital expenditures, including those not subject to amortization, related to oil and natural gas producing activities prior to Fidelity's assets being held for sale, excluding the years ended December 31, 2016 and 2015, due to no wells being drilled during that time, were as follows:
Year ended December 31, | 2014 |  | *
| (In thousands) |
Acquisitions: |  |  |
Proved properties | $ | 87,919 |  |
Unproved properties | 138,683 |  |
Exploration | 16,879 |  |
Development | 331,400 |  |
Total capital expenditures | $ | 574,881 |  |
* | Excludes net reductions to property, plant and equipment related to the recognition of future liabilities for asset retirement obligations associated with the plugging and abandonment of oil and natural gas wells of $9.0 million for the year ended December 31, 2014.
Schedule of proved developed and undeveloped oil and gas reserve quantities | The changes in the Company's estimated quantities of proved oil, NGL and natural gas reserves for the year ended December 31, 2016, were as follows:
| Oil (MBbls) |  | NGL (MBbls) |  | Natural Gas (MMcf) |  | Total (MBOE) |
Proved developed and undeveloped reserves: |  |  |  |
Balance at beginning of year | 12,687 |  | 211 |  | 2,531 |  | 13,321 |
Production | — |  | — |  | — |  | — |
Extensions and discoveries | — |  | — |  | — |  | — |
Improved recovery | — |  | — |  | — |  | — |
Purchases of proved reserves | — |  | — |  | — |  | — |
Sales of proved reserves | (12,687 | ) | (211 | ) | (2,531 | ) | (13,321 | )
Revisions of previous estimates | — |  | — |  | — |  | — |
Balance at end of year | — |  | — |  | — |  | — |
Significant changes in proved reserves for the year ended December 31, 2016, include:
• | Sales of proved reserves of (13.3) MMBOE, due to the Company's decision to sell Fidelity and exit the exploration and production business
The changes in the Company's estimated quantities of proved oil, NGL and natural gas reserves for the year ended December 31, 2015, were as follows:
| Oil (MBbls) |  | NGL (MBbls) |  | Natural Gas (MMcf) |  | Total (MBOE) |
Proved developed and undeveloped reserves: |  |  |  |
Balance at beginning of year | 43,918 |  | 7,187 |  | 245,011 |  | 91,940 |
Production | (3,286 | ) | (393 | ) | (16,747 | ) | (6,471 | )
Extensions and discoveries | 744 |  | 29 |  | 681 |  | 888 |
Improved recovery | — |  | — |  | — |  | — |
Purchases of proved reserves | — |  | — |  | — |  | — |
Sales of proved reserves | (16,474 | ) | (6,864 | ) | (202,560 | ) | (57,097 | )
Revisions of previous estimates | (12,215 | ) | 252 |  | (23,854 | ) | (15,939 | )
Balance at end of year | 12,687 |  | 211 |  | 2,531 |  | 13,321 |
Significant changes in proved reserves for the year ended December 31, 2015, include:
• | Sales of proved reserves of (57.1) MMBOE, primarily due to the Company's decision to sell Fidelity and exit the exploration and production business
• | Revisions of previous estimates of (15.9) MMBOE, largely the result of lower commodity prices
The changes in the Company's estimated quantities of proved oil, NGL and natural gas reserves for the year ended December 31, 2014, were as follows:
| Oil (MBbls) |  | NGL (MBbls) |  | Natural Gas (MMcf) |  | Total (MBOE) |
Proved developed and undeveloped reserves: |  |  |  |
Balance at beginning of year | 41,019 |  | 6,602 |  | 198,445 |  | 80,695 |
Production | (4,919 | ) | (609 | ) | (20,822 | ) | (8,998 | )
Extensions and discoveries | 9,654 |  | 3,634 |  | 64,420 |  | 24,025 |
Improved recovery | — |  | — |  | — |  | — |
Purchases of proved reserves | 5,463 |  | — |  | 7,711 |  | 6,748 |
Sales of proved reserves | (4,945 | ) | (3,109 | ) | (40,451 | ) | (14,796 | )
Revisions of previous estimates | (2,354 | ) | 669 |  | 35,708 |  | 4,266 |
Balance at end of year | 43,918 |  | 7,187 |  | 245,011 |  | 91,940 |
Significant changes in proved reserves for the year ended December 31, 2014, include:
• | Extensions and discoveries of 24.0 MMBOE, primarily due to drilling activity at the Company's East Texas, Bakken and Powder River Basin properties
• | Purchases of proved reserves of 6.7 MMBOE, primarily due to the purchase of working interests and leasehold positions in the Powder River Basin
• | Sales of proved reserves of (14.8) MMBOE, primarily at the Company's South Texas and Bakken properties
• | Revisions of previous estimates of 4.3 MMBOE, largely the result of higher natural gas prices and well performance revisions
The following table summarizes the breakdown of the Company's proved reserves between proved developed and PUD reserves at December 31:
| 2016 |  | 2015 |  | 2014 |
Proved developed reserves: |  |  |
Oil (MBbls) | — |  | 11,380 |  | 30,130 |
NGL (MBbls) | — |  | 144 |  | 4,217 |
Natural Gas (MMcf) | — |  | 2,033 |  | 184,437 |
Total (MBOE) | — |  | 11,865 |  | 65,086 |
PUD reserves: |  |  |
Oil (MBbls) | — |  | 1,307 |  | 13,788 |
NGL (MBbls) | — |  | 67 |  | 2,970 |
Natural Gas (MMcf) | — |  | 498 |  | 60,574 |
Total (MBOE) | — |  | 1,456 |  | 26,854 |
Total proved reserves: |  |  |
Oil (MBbls) | — |  | 12,687 |  | 43,918 |
NGL (MBbls) | — |  | 211 |  | 7,187 |
Natural Gas (MMcf) | — |  | 2,531 |  | 245,011 |
Total (MBOE) | — |  | 13,321 |  | 91,940 |

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- Definition Tabular disclosure of aggregate capitalized costs relating to an enterprise's oil and gas producing activities and the aggregate related accumulated depreciation, depletion, amortization, and valuation allowances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=34713648&loc=d3e63019-109448 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61926-109447 + Details
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- Definition Tabular disclosure of the aggregate of costs (whether the costs are capitalized or charged to expense at the time they are incurred ) incurred for the year in oil and gas property acquisition, exploration and development activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 55 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=34713648&loc=d3e63042-109448 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62038-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Tabular disclosure of the net quantities of an enterprise's interests in proved developed and undeveloped reserves of (a) crude oil (including condensate and natural gas liquids), (b) natural gas (including coal bed methane), (c) synthetic oil, (d) synthetic gas, and (e) other nonrenewable natural resources that are intended to be upgraded during the period as of the beginning of the period, changes in quantities during the period, and as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61858-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61884-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61797-109447 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61869-109447 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61872-109447 + Details
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