2013 Q4 Form 10-K Financial Statement
#000104746914001232 Filed on February 24, 2014
Income Statement
| Concept | 2013 Q4 | 2013 | 2012 Q4 |
|---|---|---|---|
| Revenue | $214.6M | $852.4M | $217.6M |
| YoY Change | -1.38% | 26.81% | -1.09% |
| Cost Of Revenue | $17.10M | $96.80M | $23.30M |
| YoY Change | -26.61% | 1.79% | -7.17% |
| Gross Profit | $197.4M | $754.4M | $194.3M |
| YoY Change | 1.6% | 31.7% | -0.31% |
| Gross Profit Margin | 91.99% | 88.5% | 89.29% |
| Selling, General & Admin | $39.60M | $158.4M | $45.20M |
| YoY Change | -12.39% | -1.0% | 9.18% |
| % of Gross Profit | 20.06% | 21.0% | 23.26% |
| Research & Development | $35.90M | $230.3M | $3.800M |
| YoY Change | 844.74% | 135.72% | -82.57% |
| % of Gross Profit | 18.19% | 30.53% | 1.96% |
| Depreciation & Amortization | $49.80M | $233.6M | $59.70M |
| YoY Change | -16.58% | 19.98% | 11.17% |
| % of Gross Profit | 25.23% | 30.96% | 30.73% |
| Operating Expenses | $122.7M | $614.8M | $109.5M |
| YoY Change | 12.05% | 35.42% | -6.41% |
| Operating Profit | $74.70M | $139.6M | $84.80M |
| YoY Change | -11.91% | 17.51% | 8.86% |
| Interest Expense | -$28.40M | $36.81M | -$13.60M |
| YoY Change | 108.82% | -29.49% | -11.69% |
| % of Operating Profit | -38.02% | 26.37% | -16.04% |
| Other Income/Expense, Net | $200.0K | -$3.512M | $2.200M |
| YoY Change | -90.91% | 138.1% | |
| Pretax Income | $46.60M | $75.95M | $68.10M |
| YoY Change | -31.57% | 122.37% | 8.96% |
| Income Tax | $42.40M | $167.0M | $36.50M |
| % Of Pretax Income | 90.99% | 219.87% | 53.6% |
| Net Earnings | $4.200M | -$91.04M | $31.60M |
| YoY Change | -86.71% | 35.83% | -7.87% |
| Net Earnings / Revenue | 1.96% | -10.68% | 14.52% |
| Basic Earnings Per Share | -$0.24 | ||
| Diluted Earnings Per Share | $11.12K | -$0.24 | $84.47K |
| COMMON SHARES | |||
| Basic Shares Outstanding | 387.6M shares | 376.8M shares | |
| Diluted Shares Outstanding | 376.8M shares |
Balance Sheet
| Concept | 2013 Q4 | 2013 | 2012 Q4 |
|---|---|---|---|
| SHORT-TERM ASSETS | |||
| Cash & Short-Term Investments | $598.1M | $598.1M | $515.2M |
| YoY Change | 16.09% | 16.09% | -23.46% |
| Cash & Equivalents | $598.1M | $598.1M | $515.2M |
| Short-Term Investments | |||
| Other Short-Term Assets | $68.10M | $68.10M | $67.50M |
| YoY Change | 0.89% | 0.89% | -33.89% |
| Inventory | $47.42M | $47.40M | $33.28M |
| Prepaid Expenses | |||
| Receivables | $281.0K | $20.20M | $109.0M |
| Other Receivables | $1.115M | $1.100M | $3.682M |
| Total Short-Term Assets | $735.0M | $735.0M | $750.1M |
| YoY Change | -2.02% | -2.01% | -32.57% |
| LONG-TERM ASSETS | |||
| Property, Plant & Equipment | $1.523B | $1.523B | $1.526B |
| YoY Change | -0.18% | -0.18% | 10.8% |
| Goodwill | |||
| YoY Change | |||
| Intangibles | |||
| YoY Change | |||
| Long-Term Investments | $0.00 | ||
| YoY Change | |||
| Other Assets | $87.90M | $87.90M | $90.20M |
| YoY Change | -2.55% | -2.55% | 44.55% |
| Total Long-Term Assets | $1.611B | $1.611B | $1.616B |
| YoY Change | -0.32% | -0.32% | 12.27% |
| TOTAL ASSETS | |||
| Total Short-Term Assets | $735.0M | $735.0M | $750.1M |
| Total Long-Term Assets | $1.611B | $1.611B | $1.616B |
| Total Assets | $2.346B | $2.346B | $2.366B |
| YoY Change | -0.86% | -0.86% | -7.28% |
| SHORT-TERM LIABILITIES | |||
| YoY Change | |||
| Accounts Payable | $94.17M | $94.20M | $128.9M |
| YoY Change | -26.92% | -26.92% | -53.65% |
| Accrued Expenses | $115.2M | $94.80M | $41.02M |
| YoY Change | 180.86% | 157.61% | 10.29% |
| Deferred Revenue | |||
| YoY Change | |||
| Short-Term Debt | $0.00 | $0.00 | $0.00 |
| YoY Change | |||
| Long-Term Debt Due | |||
| YoY Change | |||
| Total Short-Term Liabilities | $219.3M | $219.3M | $190.3M |
| YoY Change | 15.28% | 15.24% | -43.98% |
| LONG-TERM LIABILITIES | |||
| Long-Term Debt | $900.0M | $900.0M | $1.000B |
| YoY Change | -10.0% | -10.0% | -9.91% |
| Other Long-Term Liabilities | $20.53M | $63.90M | $12.12M |
| YoY Change | 69.46% | 49.3% | 147.49% |
| Total Long-Term Liabilities | $1.134B | $963.9M | $1.147B |
| YoY Change | -1.12% | -7.57% | -3.75% |
| TOTAL LIABILITIES | |||
| Total Short-Term Liabilities | $219.3M | $219.3M | $190.3M |
| Total Long-Term Liabilities | $1.134B | $963.9M | $1.147B |
| Total Liabilities | $1.353B | $1.354B | $1.337B |
| YoY Change | 1.22% | 1.22% | -12.67% |
| SHAREHOLDERS EQUITY | |||
| Retained Earnings | -$774.2M | -$683.2M | |
| YoY Change | 13.33% | 10.88% | |
| Common Stock | $1.785B | $1.717B | |
| YoY Change | 4.0% | 5.11% | |
| Preferred Stock | |||
| YoY Change | |||
| Treasury Stock (at cost) | $21.06M | $8.397M | |
| YoY Change | 150.78% | 139850.0% | |
| Treasury Stock Shares | 4.400M shares | 2.732M shares | |
| Shareholders Equity | $992.3M | $992.3M | $1.029B |
| YoY Change | |||
| Total Liabilities & Shareholders Equity | $2.346B | $2.346B | $2.366B |
| YoY Change | -0.86% | -0.86% | -7.28% |
Cashflow Statement
| Concept | 2013 Q4 | 2013 | 2012 Q4 |
|---|---|---|---|
| OPERATING ACTIVITIES | |||
| Net Income | $4.200M | -$91.04M | $31.60M |
| YoY Change | -86.71% | 35.83% | -7.87% |
| Depreciation, Depletion And Amortization | $49.80M | $233.6M | $59.70M |
| YoY Change | -16.58% | 19.98% | 11.17% |
| Cash From Operating Activities | $241.1M | $522.4M | $221.4M |
| YoY Change | 8.9% | 40.62% | 126.38% |
| INVESTING ACTIVITIES | |||
| Capital Expenditures | -$74.20M | -$322.4M | -$97.30M |
| YoY Change | -23.74% | -14.93% | -51.15% |
| Acquisitions | |||
| YoY Change | |||
| Other Investing Activities | -$9.000M | -$1.800M | -$600.0K |
| YoY Change | 1400.0% | -92.41% | -107.41% |
| Cash From Investing Activities | -$83.10M | -$324.1M | -$97.90M |
| YoY Change | -15.12% | -19.52% | -48.77% |
| FINANCING ACTIVITIES | |||
| Cash Dividend Paid | |||
| YoY Change | |||
| Common Stock Issuance & Retirement, Net | $13.10M | ||
| YoY Change | 56.37% | ||
| Debt Paid & Issued, Net | $100.0M | ||
| YoY Change | -9.09% | ||
| Cash From Financing Activities | 0.000 | -115.3M | -8.000M |
| YoY Change | -100.0% | -9.07% | -107.27% |
| NET CHANGE | |||
| Cash From Operating Activities | 241.1M | 522.4M | 221.4M |
| Cash From Investing Activities | -83.10M | -324.1M | -97.90M |
| Cash From Financing Activities | 0.000 | -115.3M | -8.000M |
| Net Change In Cash | 158.0M | 83.00M | 115.5M |
| YoY Change | 36.8% | -152.53% | 591.62% |
| FREE CASH FLOW | |||
| Cash From Operating Activities | $241.1M | $522.4M | $221.4M |
| Capital Expenditures | -$74.20M | -$322.4M | -$97.30M |
| Free Cash Flow | $315.3M | $844.8M | $318.7M |
| YoY Change | -1.07% | 12.56% | 7.31% |
Facts In Submission
| Frame | Concept Type | Concept / XBRL Key | Value | Unit |
|---|---|---|---|---|
| CY2013Q4 | kos |
Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years
CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears
|
229140000 | USD |
| CY2012Q4 | kos |
Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years
CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears
|
179933000 | USD |
| CY2011Q2 | us-gaap |
Stock Issued During Period Shares Conversion Of Units
StockIssuedDuringPeriodSharesConversionOfUnits
|
341200000 | shares |
| CY2011Q2 | kos |
Voting Rights Per Common Share
VotingRightsPerCommonShare
|
1 | vote |
| CY2012Q4 | us-gaap |
Inventory Supplies Net Of Reserves
InventorySuppliesNetOfReserves
|
33100000 | USD |
| CY2013Q4 | us-gaap |
Energy Related Inventory Petroleum
EnergyRelatedInventoryPetroleum
|
1600000 | USD |
| CY2012Q4 | us-gaap |
Energy Related Inventory Petroleum
EnergyRelatedInventoryPetroleum
|
200000 | USD |
| CY2011Q2 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
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Stock Issued During Period Shares New Issues
StockIssuedDuringPeriodSharesNewIssues
|
34500000 | shares |
| CY2013Q4 | kos |
Number Of Classes Of Common Stock Issued And Outstanding
NumberOfClassesOfCommonStockIssuedAndOutstanding
|
1 | item |
| CY2011Q4 | kos |
Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years
CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears
|
134754000 | USD |
| CY2013Q4 | kos |
Capitalized Exploratory Well Costs Greater Than Or Equal To Three Years And Less Than Five Years
CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYearsAndLessThanFiveYears
|
135600000 | USD |
| CY2012Q4 | kos |
Capitalized Exploratory Well Costs Greater Than Or Equal To Three Years And Less Than Five Years
CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYearsAndLessThanFiveYears
|
85924000 | USD |
| CY2013 | dei |
Entity Filer Category
EntityFilerCategory
|
Large Accelerated Filer | |
| CY2013Q4 | us-gaap |
Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization
OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization
|
527832000 | USD |
| CY2012Q4 | us-gaap |
Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization
OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization
|
314190000 | USD |
| CY2013Q4 | us-gaap |
Oil And Gas Property Successful Effort Method Net
OilAndGasPropertySuccessfulEffortMethodNet
|
1508062000 | USD |
| CY2012Q4 | us-gaap |
Oil And Gas Property Successful Effort Method Net
OilAndGasPropertySuccessfulEffortMethodNet
|
1510312000 | USD |
| CY2013Q4 | us-gaap |
Property Plant And Equipment Other
PropertyPlantAndEquipmentOther
|
31658000 | USD |
| CY2012Q4 | us-gaap |
Property Plant And Equipment Other
PropertyPlantAndEquipmentOther
|
27316000 | USD |
| CY2013Q4 | us-gaap |
Property Plant And Equipment Other Accumulated Depreciation
PropertyPlantAndEquipmentOtherAccumulatedDepreciation
|
16758000 | USD |
| CY2012Q4 | us-gaap |
Property Plant And Equipment Other Accumulated Depreciation
PropertyPlantAndEquipmentOtherAccumulatedDepreciation
|
11866000 | USD |
| CY2013Q4 | us-gaap |
Property Plant And Equipment Other Net
PropertyPlantAndEquipmentOtherNet
|
14900000 | USD |
| CY2012Q4 | us-gaap |
Property Plant And Equipment Other Net
PropertyPlantAndEquipmentOtherNet
|
15450000 | USD |
| CY2013Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
1522962000 | USD |
| CY2012Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
1525762000 | USD |
| CY2013Q4 | us-gaap |
Oil And Gas Joint Interest Billing Receivables Current
OilAndGasJointInterestBillingReceivablesCurrent
|
19930000 | USD |
| CY2012Q4 | us-gaap |
Oil And Gas Joint Interest Billing Receivables Current
OilAndGasJointInterestBillingReceivablesCurrent
|
21539000 | USD |
| CY2013Q4 | us-gaap |
Proved Oil And Gas Property Successful Effort Method
ProvedOilAndGasPropertySuccessfulEffortMethod
|
801348000 | USD |
| CY2012Q4 | us-gaap |
Proved Oil And Gas Property Successful Effort Method
ProvedOilAndGasPropertySuccessfulEffortMethod
|
682276000 | USD |
| CY2013Q4 | us-gaap |
Unproved Oil And Gas Property Successful Effort Method
UnprovedOilAndGasPropertySuccessfulEffortMethod
|
524257000 | USD |
| CY2012Q4 | us-gaap |
Unproved Oil And Gas Property Successful Effort Method
UnprovedOilAndGasPropertySuccessfulEffortMethod
|
454391000 | USD |
| CY2013Q4 | us-gaap |
Capitalized Costs Support Equipment And Facilities
CapitalizedCostsSupportEquipmentAndFacilities
|
710289000 | USD |
| CY2012Q4 | us-gaap |
Capitalized Costs Support Equipment And Facilities
CapitalizedCostsSupportEquipmentAndFacilities
|
687835000 | USD |
| CY2013Q4 | us-gaap |
Oil And Gas Property Successful Effort Method Gross
OilAndGasPropertySuccessfulEffortMethodGross
|
2035894000 | USD |
| CY2012Q4 | us-gaap |
Oil And Gas Property Successful Effort Method Gross
OilAndGasPropertySuccessfulEffortMethodGross
|
1824502000 | USD |
| CY2013 | us-gaap |
Depletion Of Oil And Gas Properties
DepletionOfOilAndGasProperties
|
213700000 | USD |
| CY2012 | us-gaap |
Depletion Of Oil And Gas Properties
DepletionOfOilAndGasProperties
|
178600000 | USD |
| CY2011 | us-gaap |
Depletion Of Oil And Gas Properties
DepletionOfOilAndGasProperties
|
135500000 | USD |
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Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
|
387595931 | shares |
| CY2013 | dei |
Entity Registrant Name
EntityRegistrantName
|
Kosmos Energy Ltd. | |
| CY2013 | dei |
Entity Central Index Key
EntityCentralIndexKey
|
0001509991 | |
| CY2013 | dei |
Document Type
DocumentType
|
10-K | |
| CY2013 | dei |
Document Period End Date
DocumentPeriodEndDate
|
2013-12-31 | |
| CY2013 | dei |
Amendment Flag
AmendmentFlag
|
false | |
| CY2013 | dei |
Current Fiscal Year End Date
CurrentFiscalYearEndDate
|
--12-31 | |
| CY2013 | dei |
Entity Current Reporting Status
EntityCurrentReportingStatus
|
Yes | |
| CY2013 | us-gaap |
Number Of Reportable Segments
NumberOfReportableSegments
|
1 | segment |
| CY2013 | us-gaap |
Nature Of Operations
NatureOfOperations
|
<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="FONT-FAMILY: times;"><font size="2"><b>1. Organization</b></font></p> <p style="FONT-FAMILY: times;"><font size="2">        Kosmos Energy Ltd. was incorporated pursuant to the laws of Bermuda in January 2011 to become a holding company for Kosmos Energy Holdings. Kosmos Energy Holdings is a privately held Cayman Islands company that was formed in March 2004. As a holding company, Kosmos Energy Ltd.'s management operations are conducted through a wholly owned subsidiary, Kosmos Energy, LLC. The terms "Kosmos," the "Company," "we," "us," "our," "ours," and similar terms when used in the present tense or prospectively or for historical periods since May 16, 2011 refer to Kosmos Energy Ltd. and its wholly owned subsidiaries and for historical periods prior to May 16, 2011 refer to Kosmos Energy Holdings and its wholly owned subsidiaries, unless the context indicates otherwise.</font></p> <p style="FONT-FAMILY: times;"><font size="2">        We are a leading independent oil and gas exploration and production company focused on frontier and emerging areas along the Atlantic Margin. Our assets include existing production and other major development projects offshore Ghana, as well as exploration licenses with significant hydrocarbon potential offshore Ireland, Mauritania, Morocco (including Western Sahara) and Suriname. Kosmos is listed on the New York Stock Exchange and is traded under the ticker symbol KOS.</font></p> <p style="FONT-FAMILY: times;"><font size="2">        In May 2011, contemporaneous with Kosmos Energy Ltd.'s initial public offering ("IPO"), the then outstanding Series A Convertible Preferred Units, Series B Convertible Preferred Units and Series C Convertible Preferred Units (collectively the "Convertible Preferred Units") and common units of Kosmos Energy Holdings were exchanged into common shares of Kosmos Energy Ltd. based on the pre-offering equity value of such interests in our corporate reorganization (the "corporate reorganization"). This resulted in the Convertible Preferred Units and the common units being exchanged into 277.7 million and 63.5 million common shares of Kosmos Energy Ltd., respectively, or 341.2 million common shares in the aggregate. The 341.2 million common shares included 10.0 million service vesting restricted stock awards issued to management and employees in exchange for unvested profit units in connection with our corporate reorganization. The common shares have one vote per share and a par value of $0.01. As a result of this corporate reorganization, Kosmos Energy Holdings became wholly owned by Kosmos Energy Ltd. Subsequent to this exchange, we have one class of common stock with issued and outstanding shares.</font></p> <p style="FONT-FAMILY: times;"><font size="2">        Kosmos Energy Ltd. completed its IPO of 33.0 million common shares on May 16, 2011. In June 2011, the Company closed the sale of an additional 1.5 million common shares pursuant to the over-allotment option exercised by the underwriters of the IPO. This partial exercise of the over-allotment option brings the total number of common shares sold in the offering to 34.5 million. Our net proceeds from the sale of 34.5 million common shares, after underwriting discounts and commissions and offering expenses, were $580.4 million.</font></p> <p style="FONT-FAMILY: times;"><font size="2">        We recorded accretion on the Convertible Preferred Units of $24.4 million for the year ended December 31, 2011.</font></p> <p style="FONT-FAMILY: times;"><font size="2">        We have one reportable segment, which is the exploration and production of oil and natural gas. Substantially all of our long-lived assets and product sales are related to production located offshore Ghana.</font></p> </div> | |
| CY2013 | us-gaap |
Use Of Estimates
UseOfEstimates
|
<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="FONT-FAMILY: times;"><font size="2"><b>Use of Estimates</b></font></p> <p style="FONT-FAMILY: times;"><font size="2">        The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and the disclosures of contingent assets and liabilities. Actual results could differ from these estimates.</font></p> </div> | |
| CY2013 | us-gaap |
Prior Period Reclassification Adjustment Description
PriorPeriodReclassificationAdjustmentDescription
|
<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="FONT-FAMILY: times;"><font size="2"><b>Reclassifications</b></font></p> <p style="FONT-FAMILY: times;"><font size="2">        Certain prior period amounts have been reclassified to conform with the current year presentation. Such reclassifications had no impact on our reported net income, current assets, total assets, current liabilities, total liabilities or shareholders equity.</font></p> </div> | |
| CY2013 | dei |
Document Fiscal Year Focus
DocumentFiscalYearFocus
|
2013 | |
| CY2013 | dei |
Document Fiscal Period Focus
DocumentFiscalPeriodFocus
|
FY | |
| CY2013 | us-gaap |
Concentration Risk Credit Risk
ConcentrationRiskCreditRisk
|
<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="FONT-FAMILY: times;"><font size="2"><b>Concentration of Credit Risk</b></font></p> <p style="FONT-FAMILY: times;"><font size="2">        There are a variety of factors which affect the market for oil, including the proximity and capacity of transportation facilities, demand for oil, the marketing of competitive fuels and the effects of government regulations on oil production and sales. Our revenue can be materially affected by current economic conditions and the price of oil. However, based on the current demand for crude oil and the fact that alternative purchasers are readily available, we believe that the loss of our marketing agent and/or any of the purchasers identified by our marketing agent would not have a long-term material adverse effect on our financial position or results of operations.</font></p> </div> | |
| CY2013Q4 | us-gaap |
Inventory Supplies Net Of Reserves
InventorySuppliesNetOfReserves
|
45800000 | USD |
| CY2013 | kos |
Capitalized Exploratory Well Cost Expensed In Same Period
CapitalizedExploratoryWellCostExpensedInSamePeriod
|
78500000 | USD |
| CY2012 | kos |
Capitalized Exploratory Well Cost Expensed In Same Period
CapitalizedExploratoryWellCostExpensedInSamePeriod
|
29600000 | USD |
| CY2011 | kos |
Capitalized Exploratory Well Cost Expensed In Same Period
CapitalizedExploratoryWellCostExpensedInSamePeriod
|
51400000 | USD |
| CY2013Q4 | us-gaap |
Capitalized Exploratory Well Costs
CapitalizedExploratoryWellCosts
|
376166000 | USD |
| CY2012Q4 | us-gaap |
Capitalized Exploratory Well Costs
CapitalizedExploratoryWellCosts
|
372492000 | USD |
| CY2011Q4 | us-gaap |
Capitalized Exploratory Well Costs
CapitalizedExploratoryWellCosts
|
267592000 | USD |
| CY2013 | us-gaap |
Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves
CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves
|
32804000 | USD |
| CY2012 | us-gaap |
Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves
CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves
|
107527000 | USD |
| CY2011 | us-gaap |
Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves
CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves
|
139949000 | USD |
| CY2013 | kos |
Capitalized Exploratory Well Cost Charged To Expense Excluding Costs Capitalized And Expensed In Same Period
CapitalizedExploratoryWellCostChargedToExpenseExcludingCostsCapitalizedAndExpensedInSamePeriod
|
29130000 | USD |
| CY2012 | kos |
Capitalized Exploratory Well Cost Charged To Expense Excluding Costs Capitalized And Expensed In Same Period
CapitalizedExploratoryWellCostChargedToExpenseExcludingCostsCapitalizedAndExpensedInSamePeriod
|
2627000 | USD |
| CY2011 | kos |
Capitalized Exploratory Well Cost Charged To Expense Excluding Costs Capitalized And Expensed In Same Period
CapitalizedExploratoryWellCostChargedToExpenseExcludingCostsCapitalizedAndExpensedInSamePeriod
|
39868000 | USD |
| CY2013Q4 | us-gaap |
Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less
CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess
|
11426000 | USD |
| CY2012Q4 | us-gaap |
Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less
CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess
|
106635000 | USD |
| CY2011Q4 | us-gaap |
Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less
CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess
|
132838000 | USD |
| CY2013Q4 | us-gaap |
Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year
ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear
|
8 | project |
| CY2012Q4 | us-gaap |
Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year
ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear
|
7 | project |
| CY2011Q4 | us-gaap |
Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year
ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear
|
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| CY2013Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
94172000 | USD |
| CY2012Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
128855000 | USD |
| CY2013Q4 | kos |
Accrued Exploration Development And Production Costs Current
AccruedExplorationDevelopmentAndProductionCostsCurrent
|
73976000 | USD |
| CY2012Q4 | kos |
Accrued Exploration Development And Production Costs Current
AccruedExplorationDevelopmentAndProductionCostsCurrent
|
20616000 | USD |
| CY2013Q4 | kos |
Accrued General And Administrative Expenses Current
AccruedGeneralAndAdministrativeExpensesCurrent
|
4255000 | USD |
| CY2012Q4 | kos |
Accrued General And Administrative Expenses Current
AccruedGeneralAndAdministrativeExpensesCurrent
|
5089000 | USD |
| CY2013Q4 | kos |
Accrual For All Other Taxes Current
AccrualForAllOtherTaxesCurrent
|
15188000 | USD |
| CY2012Q4 | kos |
Accrual For All Other Taxes Current
AccrualForAllOtherTaxesCurrent
|
11124000 | USD |
| CY2013Q4 | us-gaap |
Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
|
20379000 | USD |
| CY2012Q4 | us-gaap |
Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
|
4192000 | USD |
| CY2013 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
-91044000 | USD |
| CY2013 | us-gaap |
Net Income Loss Available To Common Stockholders Diluted
NetIncomeLossAvailableToCommonStockholdersDiluted
|
-91044000 | USD |
| CY2012 | kos |
Deferred Tax Asset Netted Against Deferred Tax Liability Amount
DeferredTaxAssetNettedAgainstDeferredTaxLiabilityAmount
|
34200000 | USD |
| CY2013 | us-gaap |
Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net
DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
|
-24620000 | USD |
| CY2012 | us-gaap |
Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net
DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
|
-18302000 | USD |
| CY2011 | us-gaap |
Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net
DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
|
-18079000 | USD |
| CY2012Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
27484000 | USD |
| CY2013Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
39596000 | USD |
| CY2011Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
20670000 | USD |
| CY2012 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
1775000 | USD |
| CY2013 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
8558000 | USD |
| CY2012 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
2345000 | USD |
| CY2012 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
2694000 | USD |
| CY2013 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
3554000 | USD |
| CY2012 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
|
8135000 | USD |
| CY2013 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
|
75954000 | USD |
| CY2012 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
|
34156000 | USD |
| CY2011 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
|
99043000 | USD |
| CY2013 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
84618000 | USD |
| CY2012 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
21148000 | USD |
| CY2011 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
20229000 | USD |
| CY2013 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
82380000 | USD |
| CY2012 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
80036000 | USD |
| CY2011 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
56457000 | USD |
| CY2013 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
166998000 | USD |
| CY2012 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
101184000 | USD |
| CY2011 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
76686000 | USD |
| CY2013 | us-gaap |
Income Tax Reconciliation Foreign Income Tax Rate Differential
IncomeTaxReconciliationForeignIncomeTaxRateDifferential
|
127301000 | USD |
| CY2012 | us-gaap |
Income Tax Reconciliation Foreign Income Tax Rate Differential
IncomeTaxReconciliationForeignIncomeTaxRateDifferential
|
73277000 | USD |
| CY2011 | us-gaap |
Income Tax Reconciliation Foreign Income Tax Rate Differential
IncomeTaxReconciliationForeignIncomeTaxRateDifferential
|
52922000 | USD |
| CY2013 | us-gaap |
Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance
IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
|
-4065000 | USD |
| CY2012 | us-gaap |
Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance
IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
|
14103000 | USD |
| CY2011 | us-gaap |
Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance
IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
|
19362000 | USD |
| CY2013 | us-gaap |
Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
|
36664000 | USD |
| CY2012 | us-gaap |
Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
|
5669000 | USD |
| CY2011 | us-gaap |
Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
|
4402000 | USD |
| CY2013 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
|
7098000 | USD |
| CY2012Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
118618000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
|
-134316000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
|
-59407000 | USD |
| CY2012 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
2.962 | pure |
| CY2013 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
2.199 | pure |
| CY2011 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.774 | pure |
| CY2013 | us-gaap |
Income Tax Reconciliation Tax Holidays
IncomeTaxReconciliationTaxHolidays
|
178800000 | USD |
| CY2011 | us-gaap |
Income Tax Reconciliation Tax Holidays
IncomeTaxReconciliationTaxHolidays
|
86200000 | USD |
| CY2012 | us-gaap |
Income Tax Reconciliation Tax Holidays
IncomeTaxReconciliationTaxHolidays
|
168500000 | USD |
| CY2013Q4 | kos |
Deferred Tax Assets Foreign Capitalized Operating Expenses
DeferredTaxAssetsForeignCapitalizedOperatingExpenses
|
46087000 | USD |
| CY2012Q4 | kos |
Deferred Tax Assets Foreign Capitalized Operating Expenses
DeferredTaxAssetsForeignCapitalizedOperatingExpenses
|
38453000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards Foreign
DeferredTaxAssetsOperatingLossCarryforwardsForeign
|
17579000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards Foreign
DeferredTaxAssetsOperatingLossCarryforwardsForeign
|
41569000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
|
28112000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
|
26033000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Derivative Instruments
DeferredTaxAssetsDerivativeInstruments
|
10197000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Derivative Instruments
DeferredTaxAssetsDerivativeInstruments
|
5714000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Other
DeferredTaxAssetsOther
|
9582000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Other
DeferredTaxAssetsOther
|
11047000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
111557000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
122816000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
59540000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
63605000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
52017000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
59211000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
186333000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
118618000 | USD |
| CY2013Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
186333000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration
DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
|
52000000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards Not Subject To Expiration
DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration
|
5800000 | USD |
| CY2011 | us-gaap |
Profit Loss
ProfitLoss
|
22357000 | USD |
| CY2013 | us-gaap |
Profit Loss
ProfitLoss
|
-91044000 | USD |
| us-gaap |
Undistributed Earnings Allocated To Participating Securities
UndistributedEarningsAllocatedToParticipatingSecurities
|
1643000 | USD | |
| CY2012 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
-67028000 | USD |
| us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
34463000 | USD | |
| us-gaap |
Amount Of Dilutive Securities Stock Options And Restrictive Stock Units
AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits
|
9000 | USD | |
| CY2012 | us-gaap |
Net Income Loss Available To Common Stockholders Diluted
NetIncomeLossAvailableToCommonStockholdersDiluted
|
-67028000 | USD |
| us-gaap |
Net Income Loss Available To Common Stockholders Diluted
NetIncomeLossAvailableToCommonStockholdersDiluted
|
34472000 | USD | |
| CY2013 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
376819000 | shares |
| us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
368474000 | shares | |
| CY2013 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
376819000 | shares |
| us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
368607000 | shares | |
| us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
133000 | shares | |
| CY2013 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.24 | |
| us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.09 | ||
| CY2013 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.24 | |
| us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.09 | ||
| CY2012 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
15300000 | shares |
| us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
20500000 | shares | |
| CY2013 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
13900000 | shares |
| CY2013Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
598108000 | USD |
| CY2012Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
515164000 | USD |
| CY2013Q4 | us-gaap |
Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
|
21475000 | USD |
| CY2012Q4 | us-gaap |
Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
|
21341000 | USD |
| CY2013Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
281000 | USD |
| CY2012Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
108995000 | USD |
| CY2013Q4 | us-gaap |
Other Receivables Net Current
OtherReceivablesNetCurrent
|
1115000 | USD |
| CY2012Q4 | us-gaap |
Other Receivables Net Current
OtherReceivablesNetCurrent
|
3682000 | USD |
| CY2013Q4 | us-gaap |
Inventory Net
InventoryNet
|
47424000 | USD |
| CY2012Q4 | us-gaap |
Inventory Net
InventoryNet
|
33281000 | USD |
| CY2013Q4 | us-gaap |
Prepaid Expense And Other Assets Current
PrepaidExpenseAndOtherAssetsCurrent
|
27010000 | USD |
| CY2012Q4 | us-gaap |
Prepaid Expense And Other Assets Current
PrepaidExpenseAndOtherAssetsCurrent
|
10470000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Liabilities Net Current
DeferredTaxAssetsLiabilitiesNetCurrent
|
19618000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Liabilities Net Current
DeferredTaxAssetsLiabilitiesNetCurrent
|
34585000 | USD |
| CY2012Q4 | us-gaap |
Derivative Assets Current
DerivativeAssetsCurrent
|
1061000 | USD |
| CY2013Q4 | us-gaap |
Assets Current
AssetsCurrent
|
734961000 | USD |
| CY2012Q4 | us-gaap |
Assets Current
AssetsCurrent
|
750118000 | USD |
| CY2013Q4 | us-gaap |
Restricted Cash And Cash Equivalents Noncurrent
RestrictedCashAndCashEquivalentsNoncurrent
|
31500000 | USD |
| CY2012Q4 | us-gaap |
Restricted Cash And Cash Equivalents Noncurrent
RestrictedCashAndCashEquivalentsNoncurrent
|
29884000 | USD |
| CY2013Q4 | us-gaap |
Deferred Finance Costs Noncurrent Net
DeferredFinanceCostsNoncurrentNet
|
40111000 | USD |
| CY2012Q4 | us-gaap |
Deferred Finance Costs Noncurrent Net
DeferredFinanceCostsNoncurrentNet
|
50214000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Assets Liabilities Net Noncurrent
DeferredTaxAssetsLiabilitiesNetNoncurrent
|
16292000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Assets Liabilities Net Noncurrent
DeferredTaxAssetsLiabilitiesNetNoncurrent
|
10145000 | USD |
| CY2013Q4 | us-gaap |
Assets
Assets
|
2345826000 | USD |
| CY2012Q4 | us-gaap |
Assets
Assets
|
2366123000 | USD |
| CY2013Q4 | us-gaap |
Accrued Liabilities Current
AccruedLiabilitiesCurrent
|
115212000 | USD |
| CY2012Q4 | us-gaap |
Accrued Liabilities Current
AccruedLiabilitiesCurrent
|
41021000 | USD |
| CY2013Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
9940000 | USD |
| CY2012Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
20377000 | USD |
| CY2013Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
219324000 | USD |
| CY2012Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
190253000 | USD |
| CY2013Q4 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
900000000 | USD |
| CY2012Q4 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
1000000000 | USD |
| CY2013Q4 | us-gaap |
Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
|
3811000 | USD |
| CY2012Q4 | us-gaap |
Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
|
3226000 | USD |
| CY2013Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
170226000 | USD |
| CY2012Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
104137000 | USD |
| CY2013Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
20534000 | USD |
| CY2012Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
12117000 | USD |
| CY2013Q4 | us-gaap |
Liabilities Noncurrent
LiabilitiesNoncurrent
|
1134167000 | USD |
| CY2012Q4 | us-gaap |
Liabilities Noncurrent
LiabilitiesNoncurrent
|
1146964000 | USD |
| CY2013Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
3920000 | USD |
| CY2012Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
3914000 | USD |
| CY2013Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
1781535000 | USD |
| CY2012Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
1712880000 | USD |
| CY2013Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
-774220000 | USD |
| CY2012Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
-683176000 | USD |
| CY2013Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax
AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
|
2158000 | USD |
| CY2012Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax
AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
|
3685000 | USD |
| CY2013Q4 | us-gaap |
Treasury Stock Value
TreasuryStockValue
|
21058000 | USD |
| CY2012Q4 | us-gaap |
Treasury Stock Value
TreasuryStockValue
|
8397000 | USD |
| CY2013Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
992335000 | USD |
| CY2012Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
1028906000 | USD |
| CY2013Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
2345826000 | USD |
| CY2012Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
2366123000 | USD |
| CY2013Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
USD | |
| CY2012Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
USD | |
| CY2013Q4 | us-gaap |
Preferred Stock Par Or Stated Value Per Share
PreferredStockParOrStatedValuePerShare
|
0.01 | |
| CY2012Q4 | us-gaap |
Preferred Stock Par Or Stated Value Per Share
PreferredStockParOrStatedValuePerShare
|
0.01 | |
| CY2013Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
200000000 | shares |
| CY2012Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
200000000 | shares |
| CY2013Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | shares |
| CY2012Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | shares |
| CY2013Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
391974287 | shares |
| CY2012Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
391423703 | shares |
| CY2013Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
| CY2012Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
| CY2013Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
2000000000 | shares |
| CY2012Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
2000000000 | shares |
| CY2013Q4 | us-gaap |
Treasury Stock Shares
TreasuryStockShares
|
4400135 | shares |
| CY2012Q4 | us-gaap |
Treasury Stock Shares
TreasuryStockShares
|
2731941 | shares |
| CY2013 | us-gaap |
Oil And Gas Sales Revenue
OilAndGasSalesRevenue
|
851212000 | USD |
| CY2012 | us-gaap |
Oil And Gas Sales Revenue
OilAndGasSalesRevenue
|
667951000 | USD |
| CY2011 | us-gaap |
Oil And Gas Sales Revenue
OilAndGasSalesRevenue
|
666912000 | USD |
| CY2013 | us-gaap |
Other Nonoperating Income
OtherNonoperatingIncome
|
275000 | USD |
| CY2012 | us-gaap |
Other Nonoperating Income
OtherNonoperatingIncome
|
1108000 | USD |
| CY2011 | us-gaap |
Other Nonoperating Income
OtherNonoperatingIncome
|
9093000 | USD |
| CY2013 | us-gaap |
Other Sales Revenue Net
OtherSalesRevenueNet
|
941000 | USD |
| CY2012 | us-gaap |
Other Sales Revenue Net
OtherSalesRevenueNet
|
3150000 | USD |
| CY2011 | us-gaap |
Other Sales Revenue Net
OtherSalesRevenueNet
|
775000 | USD |
| CY2013 | us-gaap |
Revenues
Revenues
|
852428000 | USD |
| CY2012 | us-gaap |
Revenues
Revenues
|
672209000 | USD |
| CY2011 | us-gaap |
Revenues
Revenues
|
676780000 | USD |
| CY2013 | us-gaap |
Oil And Gas Production Expense
OilAndGasProductionExpense
|
96791000 | USD |
| CY2012 | us-gaap |
Oil And Gas Production Expense
OilAndGasProductionExpense
|
95109000 | USD |
| CY2011 | us-gaap |
Oil And Gas Production Expense
OilAndGasProductionExpense
|
83551000 | USD |
| CY2013 | us-gaap |
Exploration Expense
ExplorationExpense
|
230314000 | USD |
| CY2012 | us-gaap |
Exploration Expense
ExplorationExpense
|
100652000 | USD |
| CY2011 | us-gaap |
Exploration Expense
ExplorationExpense
|
128753000 | USD |
| CY2013 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
158421000 | USD |
| CY2012 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
157087000 | USD |
| CY2011 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
111235000 | USD |
| CY2013 | us-gaap |
Results Of Operations Depreciation Depletion Amortization And Accretion
ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion
|
222544000 | USD |
| CY2012 | us-gaap |
Results Of Operations Depreciation Depletion Amortization And Accretion
ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion
|
185707000 | USD |
| CY2011 | us-gaap |
Results Of Operations Depreciation Depletion Amortization And Accretion
ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion
|
140469000 | USD |
| CY2013 | us-gaap |
Amortization Of Financing Costs
AmortizationOfFinancingCosts
|
11054000 | USD |
| CY2012 | us-gaap |
Amortization Of Financing Costs
AmortizationOfFinancingCosts
|
8984000 | USD |
| CY2011 | us-gaap |
Amortization Of Financing Costs
AmortizationOfFinancingCosts
|
16193000 | USD |
| CY2012 | us-gaap |
Interest Expense
InterestExpense
|
52207000 | USD |
| CY2012 | us-gaap |
Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent
OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent
|
-1027000 | USD |
| CY2011 | us-gaap |
Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent
OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent
|
1027000 | USD |
| CY2013 | us-gaap |
Interest Expense
InterestExpense
|
36811000 | USD |
| CY2011 | us-gaap |
Interest Expense
InterestExpense
|
65749000 | USD |
| CY2013 | kos |
Gain Loss On Commodity Derivative Instruments Net Pretax
GainLossOnCommodityDerivativeInstrumentsNetPretax
|
-17027000 | USD |
| CY2012 | kos |
Gain Loss On Commodity Derivative Instruments Net Pretax
GainLossOnCommodityDerivativeInstrumentsNetPretax
|
-31490000 | USD |
| CY2011 | kos |
Gain Loss On Commodity Derivative Instruments Net Pretax
GainLossOnCommodityDerivativeInstrumentsNetPretax
|
-11777000 | USD |
| CY2012 | us-gaap |
Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
|
-5342000 | USD |
| CY2011 | us-gaap |
Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
|
-59643000 | USD |
| CY2011 | us-gaap |
Allowance For Doubtful Accounts Receivable Recoveries
AllowanceForDoubtfulAccountsReceivableRecoveries
|
39782000 | USD |
| CY2013 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-3512000 | USD |
| CY2012 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-1475000 | USD |
| CY2011 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-149000 | USD |
| CY2013 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
776474000 | USD |
| CY2012 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
638053000 | USD |
| CY2011 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
577737000 | USD |
| CY2012 | us-gaap |
Profit Loss
ProfitLoss
|
-67028000 | USD |
| CY2011 | us-gaap |
Temporary Equity Accretion To Redemption Value Adjustment
TemporaryEquityAccretionToRedemptionValueAdjustment
|
24442000 | USD |
| CY2010Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
100415000 | USD |
| CY2011Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
673092000 | USD |
| CY2012 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.18 | |
| CY2011 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.09 | |
| CY2012 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.18 | |
| CY2011 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.09 | |
| CY2012 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
371847000 | shares |
| CY2011 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
368474000 | shares |
| CY2012 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
371847000 | shares |
| CY2011 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
368607000 | shares |
| CY2013 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
|
1527000 | USD |
| CY2012 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
|
-163000 | USD |
| CY2011 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
|
-2934000 | USD |
| CY2013 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
-1527000 | USD |
| CY2012 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
1190000 | USD |
| CY2011 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
1907000 | USD |
| CY2013 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
-92571000 | USD |
| CY2012 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
-65838000 | USD |
| CY2011 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
24264000 | USD |
| CY2010Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
-614411000 | USD |
| CY2011Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
1020726000 | USD |
| CY2011 | kos |
Accrete Of Preferred Units To Redemption
AccreteOfPreferredUnitsToRedemption
|
24442000 | USD |
| CY2011 | us-gaap |
Stock Issued During Period Value Conversion Of Units
StockIssuedDuringPeriodValueConversionOfUnits
|
1002948000 | USD |
| CY2011 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
580374000 | USD |
| CY2011 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
50966000 | USD |
| CY2012 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
83423000 | USD |
| CY2013 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
69101000 | USD |
| CY2011 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
|
-2934000 | USD |
| CY2012 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
|
-163000 | USD |
| CY2013 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
|
1527000 | USD |
| CY2012 | us-gaap |
Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
|
8378000 | USD |
| CY2013 | us-gaap |
Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
|
13101000 | USD |
| CY2013 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
233598000 | USD |
| CY2012 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
194691000 | USD |
| CY2011 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
156662000 | USD |
| CY2013 | us-gaap |
Results Of Operations Dry Hole Costs
ResultsOfOperationsDryHoleCosts
|
107565000 | USD |
| CY2012 | us-gaap |
Results Of Operations Dry Hole Costs
ResultsOfOperationsDryHoleCosts
|
32229000 | USD |
| CY2011 | us-gaap |
Results Of Operations Dry Hole Costs
ResultsOfOperationsDryHoleCosts
|
91254000 | USD |
| CY2013 | us-gaap |
Unrealized Gain Loss On Derivatives
UnrealizedGainLossOnDerivatives
|
-23093000 | USD |
| CY2012 | us-gaap |
Unrealized Gain Loss On Derivatives
UnrealizedGainLossOnDerivatives
|
-18465000 | USD |
| CY2011 | us-gaap |
Unrealized Gain Loss On Derivatives
UnrealizedGainLossOnDerivatives
|
-21014000 | USD |
| CY2013 | kos |
Cash Settlements On Derivatives
CashSettlementsOnDerivatives
|
33411000 | USD |
| CY2012 | us-gaap |
Payments To Acquire Other Property Plant And Equipment
PaymentsToAcquireOtherPropertyPlantAndEquipment
|
9994000 | USD |
| CY2011 | us-gaap |
Payments To Acquire Other Property Plant And Equipment
PaymentsToAcquireOtherPropertyPlantAndEquipment
|
4303000 | USD |
| CY2013 | us-gaap |
Payments To Acquire Other Property Plant And Equipment
PaymentsToAcquireOtherPropertyPlantAndEquipment
|
4970000 | USD |
| CY2012 | kos |
Cash Settlements On Derivatives
CashSettlementsOnDerivatives
|
28594000 | USD |
| CY2011 | kos |
Cash Settlements On Derivatives
CashSettlementsOnDerivatives
|
19203000 | USD |
| CY2013 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
69026000 | USD |
| CY2012 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
83423000 | USD |
| CY2011 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
50966000 | USD |
| CY2013 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-4916000 | USD |
| CY2012 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-7890000 | USD |
| CY2011 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-2953000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
-111677000 | USD |
| CY2012 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
-176905000 | USD |
| CY2011 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
122859000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
16763000 | USD |
| CY2012 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
7385000 | USD |
| CY2011 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
-4176000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
16540000 | USD |
| CY2012 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
-3443000 | USD |
| CY2011 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
635000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-34683000 | USD |
| CY2012 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-126401000 | USD |
| CY2011 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
89214000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
|
82590000 | USD |
| CY2012 | us-gaap |
Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
|
-1486000 | USD |
| CY2011 | us-gaap |
Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
|
-7308000 | USD |
| CY2013 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
522404000 | USD |
| CY2012 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
371530000 | USD |
| CY2011 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
364909000 | USD |
| CY2013 | us-gaap |
Payments To Acquire Oil And Gas Property And Equipment
PaymentsToAcquireOilAndGasPropertyAndEquipment
|
317413000 | USD |
| CY2012 | us-gaap |
Payments To Acquire Oil And Gas Property And Equipment
PaymentsToAcquireOilAndGasPropertyAndEquipment
|
368990000 | USD |
| CY2011 | us-gaap |
Payments To Acquire Oil And Gas Property And Equipment
PaymentsToAcquireOilAndGasPropertyAndEquipment
|
478943000 | USD |
| CY2011 | us-gaap |
Payments For Proceeds From Investments
PaymentsForProceedsFromInvestments
|
-13653000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Restricted Cash
IncreaseDecreaseInRestrictedCash
|
1750000 | USD |
| CY2012 | us-gaap |
Increase Decrease In Restricted Cash
IncreaseDecreaseInRestrictedCash
|
23678000 | USD |
| CY2011 | us-gaap |
Increase Decrease In Restricted Cash
IncreaseDecreaseInRestrictedCash
|
-84453000 | USD |
| CY2013 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-324133000 | USD |
| CY2012 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-402662000 | USD |
| CY2011 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-385140000 | USD |
| CY2011 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
1503000000 | USD |
| CY2013 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
100000000 | USD |
| CY2012 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
110000000 | USD |
| CY2011 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
1438000000 | USD |
| CY2011 | us-gaap |
Proceeds From Issuance Initial Public Offering
ProceedsFromIssuanceInitialPublicOffering
|
580374000 | USD |
| CY2013 | us-gaap |
Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
|
13101000 | USD |
| CY2012 | us-gaap |
Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
|
8378000 | USD |
| CY2013 | us-gaap |
Payments Of Financing Costs
PaymentsOfFinancingCosts
|
2226000 | USD |
| CY2012 | us-gaap |
Payments Of Financing Costs
PaymentsOfFinancingCosts
|
8418000 | USD |
| CY2011 | us-gaap |
Payments Of Financing Costs
PaymentsOfFinancingCosts
|
52466000 | USD |
| CY2013 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
-115327000 | USD |
| CY2012 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
-126796000 | USD |
| CY2011 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
592908000 | USD |
| CY2013 | us-gaap |
Net Cash Provided By Used In Continuing Operations
NetCashProvidedByUsedInContinuingOperations
|
82944000 | USD |
| CY2012 | us-gaap |
Net Cash Provided By Used In Continuing Operations
NetCashProvidedByUsedInContinuingOperations
|
-157928000 | USD |
| CY2011 | us-gaap |
Net Cash Provided By Used In Continuing Operations
NetCashProvidedByUsedInContinuingOperations
|
572677000 | USD |
| CY2013 | us-gaap |
Interest Paid
InterestPaid
|
36313000 | USD |
| CY2012 | us-gaap |
Interest Paid
InterestPaid
|
41234000 | USD |
| CY2011 | us-gaap |
Interest Paid
InterestPaid
|
56845000 | USD |
| CY2013 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
68437000 | USD |
| CY2012 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
22020000 | USD |
| CY2011 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
15550000 | USD |
| CY2011 | kos |
Notes Receivable Applied
NotesReceivableApplied
|
-102783000 | USD |
| CY2010Q4 | us-gaap |
Capitalized Exploratory Well Costs
CapitalizedExploratoryWellCosts
|
167511000 | USD |
| us-gaap |
Net Income Loss
NetIncomeLoss
|
-38191000 | USD | |
| us-gaap |
Net Income Loss
NetIncomeLoss
|
36106000 | USD | |
| CY2013 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
4100000 | USD |
| CY2012 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
4300000 | USD |
| CY2011 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
2300000 | USD |
| CY2013Q4 | kos |
Oil And Gas Imbalance Asset Liability
OilAndGasImbalanceAssetLiability
|
0 | USD |
| CY2012Q4 | kos |
Oil And Gas Imbalance Asset Liability
OilAndGasImbalanceAssetLiability
|
0 | USD |
| CY2013 | dei |
Entity Well Known Seasoned Issuer
EntityWellKnownSeasonedIssuer
|
Yes | |
| CY2013 | dei |
Entity Voluntary Filers
EntityVoluntaryFilers
|
No | |
| CY2013Q2 | dei |
Entity Public Float
EntityPublicFloat
|
951286205 | USD |
| CY2013 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-91044000 | USD |
| CY2011 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-2085000 | USD |
| CY2012 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-67028000 | USD |
| CY2013Q4 | us-gaap |
Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
|
1414000 | USD |
| CY2013 | us-gaap |
Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months
CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
|
1400000 | USD |
| CY2012Q4 | us-gaap |
Accumulated Amortization Of Noncurrent Deferred Finance Costs
AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts
|
13922000 | USD |
| CY2013Q4 | us-gaap |
Accumulated Amortization Of Noncurrent Deferred Finance Costs
AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts
|
24976000 | USD |
