v3.6.0.2

Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Deferred Tax Assets (Liabilities), Net of Valuation Allowance, Current Classification [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Commodity Hedging Contracts |  | $ 22,206 |  |  |  | $ 0 |  |  |  | $ 22,206 | $ 0 |
Deferred Compensation Plans |  | 43,984 |  |  |  | 38,559 |  |  |  | 43,984 | 38,559 |
Alternative Minimum Tax Credit Carryforward |  | 84,426 |  |  |  | 93,316 |  |  |  | 84,426 | 93,316 |
Foreign Net Operating Loss |  | 37,251 |  |  |  | 47,786 |  |  |  | 37,251 | 47,786 |
Deferred Tax Liability, Net of Valuation Allowance |  | (28,097) |  |  |  | (35,536) |  |  |  | (28,097) | (35,536) |
Accrued Expenses and Liabilities |  | 13,754 |  |  |  | 0 |  |  |  | 13,754 | 0 |
Other |  | (4,137) |  |  |  | 3,687 |  |  |  | (4,137) | 3,687 |
Total Net Current Deferred Income Tax Assets |  | 169,387 |  |  |  | 147,812 |  |  |  | 169,387 | 147,812 |
Deferred Tax Assets (Liabilities) Net Noncurrent Classification [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Foreign Oil and Gas Exploration and Development Costs Deducted for Tax Under Book Depreciation, Depletion and Amortization |  | (39,852) |  |  |  | (57,569) |  |  |  | (39,852) | (57,569) |
Foreign Net Operating Loss |  | 314,899 |  |  |  | 443,010 |  |  |  | 314,899 | 443,010 |
Foreign Valuation Allowances |  | (268,499) |  |  |  | (380,104) |  |  |  | (268,499) | (380,104) |
Foreign Other |  | 438 |  |  |  | 1,506 |  |  |  | 438 | 1,506 |
Total Net Noncurrent Deferred Income Tax Assets |  | 6,986 |  |  |  | 6,843 |  |  |  | 6,986 | 6,843 |
Deferred tax (assets) liabilities net noncurrent classification [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Oil and Gas Exploration and Development Costs Deducted for Tax Over Book Depreciation, Depletion and Amortization |  | 5,899,533 |  |  |  | 5,299,817 |  |  |  | 5,899,533 | 5,299,817 |
Non-Producing Leasehold Costs |  | (64,898) |  |  |  | (53,026) |  |  |  | (64,898) | (53,026) |
Seismic Costs Capitalized for Tax |  | (161,920) |  |  |  | (162,240) |  |  |  | (161,920) | (162,240) |
Equity Awards |  | (139,787) |  |  |  | (140,663) |  |  |  | (139,787) | (140,663) |
Capitalized Interest |  | 86,504 |  |  |  | 98,242 |  |  |  | 86,504 | 98,242 |
Alternative Minimum Tax Credit Carryforward |  | (673,205) |  |  |  | (685,189) |  |  |  | (673,205) | (685,189) |
Undistributed Foreign Earnings |  | 280,099 |  |  |  | 258,403 |  |  |  | 280,099 | 258,403 |
Total Net Noncurrent Deferred Income Tax Liabilities |  | 5,188,640 |  |  |  | 4,587,902 |  |  |  | 5,188,640 | 4,587,902 |
Deferred Tax and Other Assets, Noncurrent |  | (37,686) |  |  |  | (27,442) |  |  |  | (37,686) | (27,442) |
Deferred Tax Liabilities, Net |  | 5,012,267 |  |  |  | 4,433,247 |  |  |  | 5,012,267 | 4,433,247 |
Income Before Income Taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
United States |  |  |  |  |  |  |  |  |  | (1,520,573) | (6,840,119) | $ 5,161,232
Foreign |  |  |  |  |  |  |  |  |  | (36,932) | (81,437) | (165,917)
Income (Loss) Before Income Taxes |  | (194,010) | $ (272,250) | $ (380,277) | $ (710,968) | (398,826) | $ (6,274,921) | $ (11,478) | $ (236,331) | (1,557,505) | (6,921,556) | 4,995,315
Current income tax provision (benefit) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  | 11,567 | 21,719 | 269,326
State |  |  |  |  |  |  |  |  |  | (8,369) | 9,404 | 22,835
Foreign |  |  |  |  |  |  |  |  |  | 51,189 | 54,143 | 82,721
Total |  |  |  |  |  |  |  |  |  | 54,387 | 85,266 | 374,882
Deferred income tax provision (benefit) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  | (532,979) | (2,362,926) | 1,608,706
State |  |  |  |  |  |  |  |  |  | 4,876 | (127,444) | 29,056
Foreign |  |  |  |  |  |  |  |  |  | 12,897 | 8,063 | 67,184
Total |  |  |  |  |  |  |  |  |  | (515,206) | (2,482,307) | 1,704,946
Income Tax Provision (Benefit) |  |  |  |  |  |  |  |  |  | $ (460,819) | $ (2,397,041) | $ 2,079,828
Effective income tax rate [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Statutory Federal Income Tax Rate (in hundredths) |  |  |  |  |  |  |  |  |  | 35.00% | 35.00% | 35.00%
State Income Tax, Net of Federal Benefit (in hundredths) |  |  |  |  |  |  |  |  |  | 0.15% | 1.11% | 0.68%
Income Tax Provision Related to Foreign Operations (in hundredths) |  |  |  |  |  |  |  |  |  | (1.23%) | (1.31%) | (0.12%)
Income Tax Provision Related to Trinidad Operations (in hundredths) |  |  |  |  |  |  |  |  |  | (3.71%) | 0.00% | 0.00%
Canadian Divestiture (in hundredths) |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% | (3.46%)
Undistributed Foreign Earnings (in hundredths) |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% | 4.94%
Foreign Valuation Allowances (in hundredths) |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% | 6.47%
Foreign Oil and Gas Impairments (in hundredths) |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% | (1.90%)
Other (in hundredths) |  |  |  |  |  |  |  |  |  | (0.62%) | (0.17%) | 0.03%
Effective Income Tax Rate (in hundredths) |  |  |  |  |  |  |  |  |  | 29.59% | 34.63% | 41.64%
Valuation Allowance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  |  | $ 506,127 |  |  |  | $ 463,018 | $ 506,127 | $ 463,018 | $ 223,599
Increase | [1] |  |  |  |  |  |  |  |  | 37,221 | 146,602 | 392,729
Decrease | [2] |  |  |  |  |  |  |  |  | (12,667) | (4,315) | (1,424)
Other | [3] |  |  |  |  |  |  |  |  | (147,460) | (99,178) | (151,886)
Ending Balance |  | 383,221 |  |  |  | $ 506,127 |  |  |  | 383,221 | $ 506,127 | $ 463,018
Unrecognized tax benefits balance |  | 36,000 |  |  |  |  |  |  |  | 36,000 |  |
Unrecognized tax benefit earnings impact |  | 2,000 |  |  |  |  |  |  |  | 2,000 |  |
Foreign subsidiaries' undistributed earnings |  | 2,000,000 |  |  |  |  |  |  |  | 2,000,000 |  |
Balance of State net operating loss expected to be carried forward |  |  |  |  |  |  |  |  |  | 1,600,000 |  |
Alternative minimum tax credits utilized |  |  |  |  |  |  |  |  |  | 21,000 |  |
AMT Paid In Years Prior To Prior Reporting Period |  |  |  |  |  |  |  |  |  | 758,000 |  |
Tax net operating loss incurred in United Kingdom in current year |  |  |  |  |  |  |  |  |  | 38,000 |  |
Balance of tax net operating loss incurred in the United Kingdom in prior years |  |  |  |  |  |  |  |  |  | 740,000 |  |
Unrecognized tax benefits interest or penalties |  | 2,000 |  |  |  |  |  |  |  | 2,000 |  |
Federal and state deferred income taxes |  | $ 280,000 |  |  |  |  |  |  |  | $ 280,000 |  |
[1] | Increase in valuation allowance related to the generation of tax net operating losses and other deferred tax assets.
[2] | Decrease in valuation allowance associated with adjustments to certain deferred tax assets and their related allowance.
[3] | Represents dispositions/revisions/foreign exchange rate variances and the effect of statutory income tax rate changes.

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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Income tax expense for oil and gas producing activities. + References Reference 1: 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=68064819&loc=d3e62259-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447 + Details
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- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 740 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6487024&loc=d3e29054-158556 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 740 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6479915&loc=d3e66715-112838 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 995 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6503627&loc=d3e59836-110443 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28200-109314 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(c) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e32123-109318 + Details
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