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Supplemental Information on Oil and Gas Producing Activities (Tables) | 12 Months Ended
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Dec. 31, 2013
Costs Incurred in Oil and Gas Property - Acquisition, Exploration and Development Activities |
(In thousands) | United States |
| 2013 |  |  | 2012 |  |  | 2011 |
Costs incurred during the year: |  |  |  |  |  |  |  |  |  |  |
Exploration - capitalized | $ | - |  |  |  | 2,602 |  |  | $ | - |
Exploration - expensed |  | 11,497 |  |  |  | 38,159 |  |  |  | 2,083 |
Acquisition |  | - |  |  |  | 1,630 |  |  |  | 9,495 |
Development |  | 113 |  |  |  | 9,689 |  |  |  | 14,936 |
Total | $ | 11,610 |  |  |  | 52,080 |  |  | $ | 26,514 |
(In thousands) | International |
| 2013 |  |  | 2012 |  |  | 2011 |
Costs incurred during the year: |  |  |  |  |  |  |  |  |  |  |
Exploration - capitalized | $ | 2,942 |  |  | $ | 5,916 |  |  | $ | 69 |
Exploration - expensed |  | 12,431 |  |  |  | 2,878 |  |  |  | 3,625 |
Acquisition |  | - |  |  |  | 10,000 |  |  |  | 455 |
Development |  | 54,420 |  |  |  | 4,022 |  |  |  | 8,011 |
Total | $ | 69,793 |  |  | $ | 22,816 |  |  | $ | 12,160 |
Capitalized Costs Relating to Oil and Gas Producing Activities |
| December 31, |
| 2013 |  |  | 2012 |  |  | 2011 |
Capitalized costs - |  |  |  |  |  |  |  |  |  |  |
Properties not being amortized | $ | 88,194 |  |  | $ | 66,794 |  |  | $ | 46,047 |
Properties being amortized (1) |  | 222,032 |  |  |  | 195,329 |  |  |  | 182,820 |
Total capitalized costs | $ | 310,226 |  |  | $ | 262,123 |  |  | $ | 228,867 |
Less accumulated depreciation, depletion, and amortization |  | (171,854 | ) |  |  | (155,681 | ) |  |  | (129,166 | )
Net capitalized costs | $ | 138,372 |  |  | $ | 106,442 |  |  | $ | 99,701 |
(1) | Includes $5.2 million, $4.7 million, and $10.4 million asset retirement cost in 2013, 2012, and 2011, respectively.
Results of Operations for Oil and Gas Producing Activities |
| United States |  |  | International |
| 2013 |  |  | 2012 |  |  | 2011 |  |  | 2013 |  |  | 2012 |  |  | 2011 |
|  |  |  |  |  |  |  |  |  | Gabon |  |  | Gabon |  |  | Gabon |
Crude oil and gas sales | $ | 1,891 |  |  | $ | 2,798 |  |  | $ | 1,655 |  |  | $ | 167,386 |  |  | $ | 192,489 |  |  | $ | 208,781 |
Production, G&A and other expense |  | (12,232 | ) |  |  | (47,866 | ) |  |  | (7,413 | ) |  |  | (52,776 | ) |  |  | (27,425 | ) |  |  | (27,471 | )
Depreciation, depletion and amortization |  | (1,528 | ) |  |  | (3,872 | ) |  |  | (1,922 | ) |  |  | (15,302 | ) |  |  | (15,954 | ) |  |  | (23,604 | )
Income tax |  | - |  |  |  | - |  |  |  | - |  |  |  | (34,115 | ) |  |  | (81,813 | ) |  |  | (93,468 | )
Results from oil and gas producing activities | $ | (11,869 | ) |  | $ | (48,940 | ) |  | $ | (7,680 | ) |  | $ | 65,193 |  |  | $ | 67,297 |  |  | $ | 64,238 |
Net Proved Reserves |
Proved Reserves: | Oil (MBbls) |  |  | Gas (MMCF) |
Balance at Janaury 1, 2011 |  | 6,922 |  |  |  | 23 |
Production |  | (1,868 | ) |  |  | (255 | )
Revisions of previous estimates |  | 959 |  |  |  | 31 |
Extensions and discoveries |  | 35 |  |  |  | 2,126 |
Balance at December 31, 2011 |  | 6,048 |  |  |  | 1,925 |
Production |  | (1,741 | ) |  |  | (532 | )
Revisions of previous estimates |  | 2,200 |  |  |  | 151 |
Extensions and discoveries |  | 981 |  |  |  | - |
Balance at December 31, 2012 |  | 7,488 |  |  |  | 1,544 |
Production |  | (1,549 | ) |  |  | (325 | )
Revisions of previous estimates |  | 771 |  |  |  | 114 |
Extensions and discoveries |  | 522 |  |  |  | - |
Balance at December 31, 2013 |  | 7,232 |  |  |  | 1,333 |
Proved Developed Reserves | Oil (MBbls) |  |  | Gas (MMCF) |
Balance at January 1, 2011 |  | 5,029 |  |  |  | 23 |
Balance at December 31, 2011 |  | 3,854 |  |  |  | 856 |
Balance at December 31, 2012 |  | 3,750 |  |  |  | 1,544 |
Balance at December 31, 2013 |  | 3,305 |  |  |  | 1,333 |
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil Reserves |
(In thousands) | United States |  |  | International |  |  | Total |
| December 31, |  |  | December 31, |  |  | December 31, |
| 2013 |  |  | 2012 |  |  | 2011 |  |  | 2013 |  |  | 2012 |  |  | 2011 |  |  | 2013 |  |  | 2012 |  |  | 2011 |
Future cash inflows | $ | 8,276 |  |  | $ | 8,260 |  |  | $ | 13,274 |  |  | $ | 725,485 |  |  | $ | 776,646 |  |  | $ | 623,546 |  |  | $ | 733,761 |  |  | $ | 784,906 |  |  | $ | 636,820 |
Future production costs |  | (3,038 | ) |  |  | (3,194 | ) |  |  | (1,661 | ) |  |  | (223,643 | ) |  |  | (203,490 | ) |  |  | (154,020 | ) |  |  | (226,681 | ) |  |  | (206,684 | ) |  |  | (155,681 | )
Future development costs |  | - |  |  |  | - |  |  |  | (4,180 | ) |  |  | (164,142 | ) |  |  | (186,982 | ) |  |  | (85,528 | ) |  |  | (164,142 | ) |  |  | (186,982 | ) |  |  | (89,708 | )
Future income tax expense |  | (825 | ) |  |  | (807 | ) |  |  | (1,347 | ) |  |  | (154,519 | ) |  |  | (181,194 | ) |  |  | (181,886 | ) |  |  | (155,344 | ) |  |  | (182,001 | ) |  |  | (183,233 | )
Future net cash flows | $ | 4,413 |  |  | $ | 4,259 |  |  | $ | 6,086 |  |  | $ | 183,181 |  |  | $ | 204,980 |  |  | $ | 202,112 |  |  | $ | 187,594 |  |  | $ | 209,239 |  |  | $ | 208,198 |
Discount to present value at 10% annual rate |  | (1,299 | ) |  |  | (1,028 | ) |  |  | (3,150 | ) |  |  | (48,859 | ) |  |  | (55,309 | ) |  |  | (38,861 | ) |  |  | (50,158 | ) |  |  | (56,337 | ) |  |  | (42,011 | )
Standardized measure of discounted future net cash flows | $ | 3,114 |  |  | $ | 3,231 |  |  | $ | 2,936 |  |  | $ | 134,322 |  |  | $ | 149,671 |  |  | $ | 163,251 |  |  | $ | 137,436 |  |  | $ | 152,902 |  |  | $ | 166,187 |
Changes in Standardized Measure of Discounted Future Net Cash Flows | The following table sets forth the changes in standardized measure of discounted future net cash flows as follows:
(In thousands) | December 31, |
| 2013 |  |  | 2012 |  |  | 2011 |
Balance at Beginning of Period | $ | 152,902 |  |  | $ | 166,187 |  |  | $ | 124,824 |
Sales of oil and gas, net of production costs |  | (132,662 | ) |  |  | (168,563 | ) |  |  | (183,705 | )
Net changes in prices and production costs |  | (52,056 | ) |  |  | (11,223 | ) |  |  | 194,633 |
Revisions of previous quantity estimates |  | 43,815 |  |  |  | 155,111 |  |  |  | 75,713 |
Additions |  | 29,620 |  |  |  | 69,092 |  |  |  | 7,742 |
Changes in estimated future development costs |  | (5,345 | ) |  |  | (67,834 | ) |  |  | (5,831 | )
Development costs incurred during the period |  | 44,389 |  |  |  | 34,944 |  |  |  | 31,913 |
Accretion of discount |  | 15,290 |  |  |  | 16,619 |  |  |  | 12,482 |
Net change of income taxes |  | 26,120 |  |  |  | 7,445 |  |  |  | 4,455 |
Change in production rates (timing) and other |  | 15,363 |  |  |  | (48,876 | ) |  |  | (96,039 | )
Balance at End of Period | $ | 137,436 |  |  | $ | 152,902 |  |  | $ | 166,187 |

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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 15 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61929-109447 Reference 2: 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=8451039&loc=d3e61926-109447 Reference 3: 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=8451751&loc=d3e63019-109448 Reference 4: 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=8451039&loc=d3e61901-109447 + 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 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: 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=8451751&loc=d3e63042-109448 Reference 3: 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=8451039&loc=d3e62059-109447 Reference 4: 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=8451039&loc=d3e62038-109447 Reference 5: 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=8451039&loc=d3e62014-109447 + Details
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- Definition Tabular disclosure of the results of operations for oil and gas producing activities for the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 55 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8451751&loc=d3e63071-109448 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62136-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62246-109447 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62352-109447 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(a)(17)(ii),(c)(3)(ii)(A)(1)) -URI http://asc.fasb.org/extlink&oid=27015464&loc=d3e511914-122862 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62259-109447 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62299-109447 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62094-109447 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62395-109447 + Details
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- Definition Tabular disclosure of the aggregate change in the standardized measure of discounted future net cash flows relating to proved oil and gas reserves and oil and gas subject to purchases under long-term agreements in which the enterprise participates in the operation of the properties on which oil and gas is located or otherwise serves as the producer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 36 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62536-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62500-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62496-109447 + 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=8451039&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 4 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61797-109447 Reference 3: 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=8451039&loc=d3e61869-109447 Reference 4: 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=8451039&loc=d3e61831-109447 Reference 5: 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=8451039&loc=d3e61872-109447 Reference 6: 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=8451039&loc=d3e61884-109447 + Details
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- Definition Tabular disclosure of the future net cash flows relating to proved oil and gas reserves and oil and gas subject to purchase under long-term agreements in which the enterprise participates in the operation of the properties on which the oil and gas is located or otherwise serves as the producer. This information is presented in aggregate and for each geographic area for which reserve quantities are disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 36 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62536-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62424-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62479-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62455-109447 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62500-109447 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62476-109447 + Details
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