$KOS
Kosmos Energy Ltd. Stock $kos

$kos Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000150999119000063 Filed on March 01, 2019

Income Statement

Concept	2018 Q4	2018	2017 Q4
Revenue	$301.4M	$886.7M	$187.1M
YoY Change	61.09%	53.37%	-11.29%
Cost Of Revenue	$73.10M	$224.7M	$46.20M
YoY Change	58.23%	77.07%	5.72%
Gross Profit	$228.4M	$661.9M	$140.9M
YoY Change	62.1%	46.67%	25.36%
Gross Profit Margin	75.78%	74.65%	75.31%
Selling, General & Admin	$34.50M	$99.90M	$17.70M
YoY Change	94.92%	46.27%	-36.79%
% of Gross Profit	15.11%	15.09%	12.56%
Research & Development	$54.60M	$301.5M	$53.40M
YoY Change	2.25%	39.52%	-29.55%
% of Gross Profit	23.91%	45.55%	37.9%
Depreciation & Amortization	$123.5M	$339.2M	$76.80M
YoY Change	60.81%	27.81%	-0.13%
% of Gross Profit	54.07%	51.25%	54.51%
Operating Expenses	$197.2M	$730.6M	$137.9M
YoY Change	43.0%	33.66%	-29.46%
Operating Profit	$31.20M	-$68.70M	$3.000M
YoY Change	940.0%	-27.91%	-103.61%
Interest Expense	$247.9M	$6.300M	-$124.5M
YoY Change	-299.12%	-104.46%	327.84%
% of Operating Profit	794.55%		-4150.0%
Other Income/Expense, Net	$8.100M	$6.501M	$0.00
YoY Change		-222.87%	-100.0%
Pretax Income	$287.0M	-$50.86M	-$121.5M
YoY Change	-336.21%	-71.4%	111.67%
Income Tax	$101.5M	$43.13M	-$16.20M
% Of Pretax Income	35.37%
Net Earnings	$185.6M	-$93.99M	-$122.1M
YoY Change	-252.0%	-57.81%	115.31%
Net Earnings / Revenue	61.57%	-10.6%	-65.25%
Basic Earnings Per Share	$0.44	-$0.23	-$0.31
Diluted Earnings Per Share	$0.43	-$0.23	-$0.31
COMMON SHARES
Basic Shares Outstanding	433.6M shares	404.6M shares	389.4M shares
Diluted Shares Outstanding		404.6M shares

Balance Sheet

Concept	2018 Q4	2018	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$173.5M	$173.5M	$233.4M
YoY Change	-25.66%	-25.66%	20.25%
Cash & Equivalents	$173.5M	$173.5M	$233.4M
Short-Term Investments
Other Short-Term Assets	$111.3M	$111.3M	$67.40M
YoY Change	65.13%	65.13%	6.31%
Inventory	$84.83M	$84.80M	$71.86M
Prepaid Expenses
Receivables	$48.16M	$112.7M	$0.00
Other Receivables	$21.69M	$27.30M	$25.62M
Total Short-Term Assets	$509.7M	$509.7M	$533.6M
YoY Change	-4.48%	-4.48%	12.29%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.460B	$3.460B	$2.318B
YoY Change	49.26%	49.27%	-14.44%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$51.90M	$66.20M	$236.5M
YoY Change	-78.06%	-72.02%
Other Assets	$52.60M	$52.60M	$104.6M
YoY Change	-49.71%	-49.71%	-31.9%
Total Long-Term Assets	$3.578B	$3.579B	$2.659B
YoY Change	34.58%	34.58%	-7.23%
TOTAL ASSETS
Total Short-Term Assets	$509.7M	$509.7M	$533.6M
Total Long-Term Assets	$3.578B	$3.579B	$2.659B
Total Assets	$4.088B	$4.088B	$3.193B
YoY Change	28.05%	28.05%	-4.45%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$176.5M	$176.5M	$141.8M
YoY Change	24.51%	24.47%	-35.73%
Accrued Expenses	$195.6M	$186.2M	$219.4M
YoY Change	-10.85%	-7.82%	69.16%
Deferred Revenue	$24.38M		$0.00
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$384.3M	$384.3M	$428.7M
YoY Change	-10.36%	-10.36%	15.87%
LONG-TERM LIABILITIES
Long-Term Debt	$2.121B	$2.121B	$1.283B
YoY Change	65.31%	65.3%	-2.96%
Other Long-Term Liabilities	$9.160M	$164.7M	$10.61M
YoY Change	-13.68%	53.35%	25.6%
Total Long-Term Liabilities	$2.762B	$2.285B	$1.867B
YoY Change	47.98%	64.38%	-1.24%
TOTAL LIABILITIES
Total Short-Term Liabilities	$384.3M	$384.3M	$428.7M
Total Long-Term Liabilities	$2.762B	$2.285B	$1.867B
Total Liabilities	$3.147B	$3.147B	$2.295B
YoY Change	37.08%	37.08%	1.56%
SHAREHOLDERS EQUITY
Retained Earnings	-$1.167B		-$1.073B
YoY Change	8.76%		26.2%
Common Stock	$2.346B		$2.019B
YoY Change	16.21%		1.99%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$237.0M		$48.20M
YoY Change	391.75%		1.26%
Treasury Stock Shares	44.26M shares		9.189M shares
Shareholders Equity	$941.5M	$941.5M	$897.1M
YoY Change
Total Liabilities & Shareholders Equity	$4.088B	$4.088B	$3.193B
YoY Change	28.05%	28.05%	-4.45%

Cashflow Statement

Concept	2018 Q4	2018	2017 Q4
OPERATING ACTIVITIES
Net Income	$185.6M	-$93.99M	-$122.1M
YoY Change	-252.0%	-57.81%	115.31%
Depreciation, Depletion And Amortization	$123.5M	$339.2M	$76.80M
YoY Change	60.81%	27.81%	-0.13%
Cash From Operating Activities	$170.3M	$260.5M	$142.2M
YoY Change	19.76%	10.09%	20.82%
INVESTING ACTIVITIES
Capital Expenditures	-$68.90M	$385.4M	-$41.00M
YoY Change	68.05%	571.11%	33.55%
Acquisitions
YoY Change
Other Investing Activities	$42.10M	$198.4M	-$231.3M
YoY Change	-118.2%	-2256.52%
Cash From Investing Activities	-$26.80M	-$985.1M	-$272.3M
YoY Change	-90.16%	545.72%	784.09%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$206.1M
YoY Change		9291.57%
Debt Paid & Issued, Net		$325.0M
YoY Change		30.0%
Cash From Financing Activities	-165.3M	$605.3M	199.8M
YoY Change	-182.73%	-1258.18%	-199900.0%
NET CHANGE
Cash From Operating Activities	170.3M	$260.5M	142.2M
Cash From Investing Activities	-26.80M	-$985.1M	-272.3M
Cash From Financing Activities	-165.3M	$605.3M	199.8M
Net Change In Cash	-21.80M	-$119.4M	69.70M
YoY Change	-131.28%	-475.48%	-19.7%
FREE CASH FLOW
Cash From Operating Activities	$170.3M	$260.5M	$142.2M
Capital Expenditures	-$68.90M	$385.4M	-$41.00M
Free Cash Flow	$239.2M	-$124.9M	$183.2M
YoY Change	30.57%	-169.73%	23.45%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	1954943075	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	Kosmos Energy Ltd.
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2018Q4	kos	Accrual For All Other Taxes Current AccrualForAllOtherTaxesCurrent	4613000	USD
CY2017Q4	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	144717000	USD
CY2018Q4	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	92613000	USD
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CY2018Q4	kos	Accrued General And Administrative Expenses Current AccruedGeneralAndAdministrativeExpensesCurrent	39373000	USD
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CY2018Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	6617000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5311000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	0	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	3345000	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-3945000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2017Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	66595000	USD
CY2018Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	145336000	USD
CY2016Q4	us-gaap	Assets Assets	3341465000	USD
CY2017Q4	us-gaap	Assets Assets	3192603000	USD
CY2018Q4	us-gaap	Assets Assets	4088189000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	533602000	USD
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	442914675	shares
CY2018Q4	us-gaap	Assets Current AssetsCurrent	509700000	USD
CY2017Q4	us-gaap	Capitalized Costs Support Equipment And Facilities CapitalizedCostsSupportEquipmentAndFacilities	1427054000	USD
CY2018Q4	us-gaap	Capitalized Costs Support Equipment And Facilities CapitalizedCostsSupportEquipmentAndFacilities	1463213000	USD
CY2016	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	307582000	USD
CY2017	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	69567000	USD
CY2018	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	10518000	USD
CY2016	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	0	USD
CY2017	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	0	USD
CY2018	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	52966000	USD
CY2015Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	426881000	USD
CY2016Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	734463000	USD
CY2017Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	410113000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	367665000	USD
CY2016Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	279809000	USD
CY2017Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	67159000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	0	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	194057000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	233412000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	173515000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	310862000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	273195000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	304986000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	185616000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-37667000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	31791000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-119370000	USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	398599457	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	3986000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	4429000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	0	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	24379000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	679919000	USD
CY2017Q1	us-gaap	Costs And Expenses CostsAndExpenses	158630000	USD
CY2017Q2	us-gaap	Costs And Expenses CostsAndExpenses	131252000	USD
CY2017Q3	us-gaap	Costs And Expenses CostsAndExpenses	216162000	USD
CY2017Q4	us-gaap	Costs And Expenses CostsAndExpenses	308647000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	814691000	USD
CY2018Q1	us-gaap	Costs And Expenses CostsAndExpenses	201751000	USD
CY2018Q2	us-gaap	Costs And Expenses CostsAndExpenses	364091000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	477179000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	33963000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	173055000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	257053000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	79530000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	100193000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	364912000	USD
CY2018Q4	us-gaap	Costs And Expenses CostsAndExpenses	22475000	USD
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	953229000	USD
CY2016	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	196201000	USD
CY2017	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	172849000	USD
CY2018	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	178293000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12777000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	35432000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	33986000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1325000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2175000000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	2510000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	8937000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	22517000	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	14004000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-23561000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9505000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9145000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	533561000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	563368000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	476548000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	59336000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	25307000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	28050000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Not Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration	84700000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	20783000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	11408000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	93525000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	156860000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	454031000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	463175000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	15979000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	533561000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	547389000	USD
CY2016	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	131500000	USD
CY2017	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	244900000	USD
CY2018	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	316300000	USD
CY2016	us-gaap	Depreciation Depreciation	3500000	USD
CY2017Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	39000	USD
CY2017	us-gaap	Depreciation Depreciation	3400000	USD
CY2017Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1682000	USD
CY2018Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	38785000	USD
CY2018	us-gaap	Depreciation Depreciation	4600000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	150608000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	265407000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	339214000	USD
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.13
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.26
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2018Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	14312000	USD
CY2016	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-46559000	USD
CY2017	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-71822000	USD
CY2018	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	29960000	USD
CY2017Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	67531000	USD
CY2018Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	12172000	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	30209000	USD
CY2018Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	10181000	USD
CY2017Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	780000	USD
CY2018Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	5580000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.74
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.07
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.02
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.16
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.57
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.13
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.26
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.23
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.74
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.02
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.16
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.57
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.23
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.04
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.25
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.85
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	5504000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	3086000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-387000	USD
CY2017Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	8400000	USD
CY2018Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	1400000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	236514000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	51896000	USD
CY2016	us-gaap	Exploration Expense ExplorationExpense	202280000	USD
CY2017	us-gaap	Exploration Expense ExplorationExpense	216050000	USD
CY2018	us-gaap	Exploration Expense ExplorationExpense	301492000	USD
CY2018	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	15305000	USD
CY2016	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
CY2017	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	7666000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4324000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	87623000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	68302000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	99856000	USD
CY2018	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-294564000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-177855000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-50860000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-6252000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	72881000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	0	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6252000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	45000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10784000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44937000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43131000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	29263000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	6008000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	63335000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	16721000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0	USD
CY2017	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0	USD
CY2016	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-57898000	USD
CY2017	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	9381000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	5013000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	0	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-10681000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	556000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	3790000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	656000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	8694000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	-30000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	3256000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1999000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1680000	USD
CY2016	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	0	USD
CY2017	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	2565000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	2643000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	59803000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	30282000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-8848000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-17557000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	31710000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	18731000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	20558000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-29365000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-175954000	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	-2565000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	121400000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	164400000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	261200000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	13997000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	48815000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	45984000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-75487000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-94434000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7440000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-3567000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	86595000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-157393000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	4107000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1653000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	28331000	USD
CY2016	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	59803000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	30282000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	28331000	USD
CY2016	us-gaap	Interest Costs Incurred InterestCostsIncurred	89029000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	92687000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	114134000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	27860000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	55381000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	83831000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	20457000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	18152000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	71861000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	84827000	USD
CY2017Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	63500000	USD
CY2018Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	83400000	USD
CY2016	us-gaap	Inventory Write Down InventoryWriteDown	14900000	USD
CY2016	us-gaap	Inventory Write Down InventoryWriteDown	14900000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2120547000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	448019000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-52261000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	605277000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-537763000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	900000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	866000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	300000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	280000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3192603000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4088189000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	428730000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	384308000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1866761000	USD
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	2762403000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	1282797000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	2120547000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	570200000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	305100000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	614100000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	685600000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1282797000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-152565000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-985138000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	52077000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	236617000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	260491000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-283780000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	-28841000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	-8467000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	-63405000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-122079000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-222792000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-50226000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-103273000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-126057000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	185565000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-93991000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2017Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	134565000	USD
CY2018Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	64572000	USD
CY2017Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Noncurrent OilAndGasJointInterestBillingReceivablesNoncurrent	34941000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	4995961000	USD
CY2017Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	2310973000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3444864000	USD
CY2016	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	119367000	USD
CY2017	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	126850000	USD
CY2018	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	224727000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3300000	USD
CY2018Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Noncurrent OilAndGasJointInterestBillingReceivablesNoncurrent	19002000	USD
CY2017Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	1234806000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	1551097000	USD
CY2017Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	3545779000	USD
CY2017	us-gaap	Other Operating Income OtherOperatingIncome	58697000	USD
CY2018	us-gaap	Other Operating Income OtherOperatingIncome	8037000	USD
CY2017Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	25616000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3300000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	4700000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2421000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	450000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	29458000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	3063000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10612000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	9160000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-13355000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-5952000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2865000	USD
CY2016	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-920000	USD
CY2017	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	76000	USD
CY2018	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-2972000	USD
CY2016	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1954000	USD
CY2017	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3422000	USD
CY2018	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3455000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-23116000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-5291000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6501000	USD
CY2016	us-gaap	Other Operating Income OtherOperatingIncome	74978000	USD
CY2018Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	21690000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1981000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2194000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	206051000	USD
CY2016	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	67000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	38672000	USD
CY2016	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	231280000	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2016	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	0	USD
CY2017	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	0	USD
CY2018	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	961764000	USD
CY2016	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	535975000	USD
CY2017	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	140495000	USD
CY2018	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	213806000	USD
CY2016	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	1998000	USD
CY2017	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2858000	USD
CY2018	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	7935000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	644510000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	57432000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	385434000	USD
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	9306000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	68040000	USD
CY2016	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	184664000	USD
CY2016	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	74800000	USD
CY2017	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	58700000	USD
CY2018	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	450000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	200000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1175000000	USD
CY2016	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	210000	USD
CY2017	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	222068000	USD
CY2018	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	13703000	USD
CY2016Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	5	project
CY2017Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	5	project
CY2018Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	3	project
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2708892000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2317828000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3459701000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	39405000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	51987000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	32550000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	37150000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	6855000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	14837000	USD
CY2017Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	1653616000	USD
CY2018Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	2773276000	USD
CY2016	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	0	USD
CY2017	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	176881000	USD
CY2018	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	26224000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	250000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	325000000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	24506000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	56380000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	4527000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	54632000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	15194000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	7574000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	897112000	USD
CY2016	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	140404000	USD
CY2017	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	255203000	USD
CY2018	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	329835000	USD
CY2016	us-gaap	Results Of Operations Dry Hole Costs ResultsOfOperationsDryHoleCosts	6079000	USD
CY2017	us-gaap	Results Of Operations Dry Hole Costs ResultsOfOperationsDryHoleCosts	43201000	USD
CY2018	us-gaap	Results Of Operations Dry Hole Costs ResultsOfOperationsDryHoleCosts	123199000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-1073202000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-1167193000	USD
CY2016	us-gaap	Revenues Revenues	310377000	USD
CY2017	us-gaap	Revenues Revenues	578139000	USD
CY2018	us-gaap	Revenues Revenues	886666000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	40084000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	39913000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	35230000	USD
CY2016	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2017	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	307944000	USD
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	307944000	USD
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	1325513000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1081199000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	941478000	USD
CY2018Q4	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	5.38
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	9188819	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	44263269	shares
CY2018Q4	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	35000000	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	48197000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	237007000	USD
CY2018Q4	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	188000000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1981000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2194000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	206051000	USD
CY2017Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	465109000	USD
CY2018Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	759472000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-46559000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-71822000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	29960000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	385402000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	388375000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	404585000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	385402000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	388375000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	404585000	shares
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Concentration of Credit Risk</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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 international operations. For our U.S. Gulf of Mexico operations, crude oil and natural gas are transported to customers using third-party pipelines.</font></div></div>
CY2018	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Organization</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Kosmos Energy Ltd. changed its jurisdiction of incorporation from Bermuda to the State of Delaware (the "Redomestication") in December 2018. All outstanding common shares of Kosmos Energy Ltd., an exempted company incorporated pursuant to the laws of Bermuda, were automatically converted by operation of law, on a one-for-one basis, into shares of common stock of Kosmos Energy Ltd., a company incorporated pursuant to the laws of Delaware. The number of shares of the Company’s common stock outstanding immediately after the Redomestication was the same as the number of common shares of Kosmos Energy Ltd. outstanding immediately prior to the Redomestication. Kosmos Energy Ltd. was originally incorporated pursuant to the laws of Bermuda in January 2011 to become a holding company for Kosmos Energy Holdings. As part of the Redomestication, we transferred all of our equity interests in Kosmos Energy Holdings to a new, wholly-owned subsidiary, Kosmos Energy Delaware Holdings, LLC, a Delaware limited liability company. 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 refer to Kosmos Energy Ltd. and its wholly-owned subsidiaries, unless the context indicates otherwise.</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Kosmos is a full-cycle deepwater independent oil and gas exploration and production company focused along the Atlantic Margins. Our key assets include production offshore Ghana, Equatorial Guinea and U.S. Gulf of Mexico, as well as a world-class gas development offshore Mauritania and Senegal. We also maintain a sustainable exploration program balanced between proven basin infrastructure-led exploration (Equatorial Guinea and U.S. Gulf of Mexico), emerging basins (Mauritania, Senegal and Suriname) and frontier basins (Cote d'Ivoire, Namibia and Sao Tome and Principe). </font><font style="font-family:inherit;font-size:10pt;">Kosmos is listed on the New York Stock Exchange (“NYSE”) and London Stock Exchange ("LSE") and is traded under the ticker symbol KOS.</font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Kosmos is engaged in a single line of business, which is the exploration and production of oil and natural gas. We have operations in </font><font style="font-family:inherit;font-size:10pt;">four</font><font style="font-family:inherit;font-size:10pt;"> geographic areas: Ghana, Equatorial Guinea, Mauritania/Senegal and the United States of America.</font></div></div>
CY2018	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Reclassifications</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior period amounts have been reclassified to conform with the current year presentation. Such reclassifications had no material impact on our reported net income (loss), current assets, total assets, current liabilities, total liabilities, shareholders’ equity or cash flows, except as disclosed related to the adoption of recent accounting pronouncements.</font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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></div></div>

Files In Submission

Name	View Source	Status
0001509991-19-000063-index-headers.html	Edgar Link	pending
0001509991-19-000063-index.html	Edgar Link	pending
0001509991-19-000063.txt	Edgar Link	pending
0001509991-19-000063-xbrl.zip	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
kos-12312018x10k.htm	Edgar Link	pending
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kos-1231208xex991.htm	Edgar Link	pending
kos-20181231.xml	Edgar Link	completed
kos-20181231.xsd	Edgar Link	pending
kos-20181231_cal.xml	Edgar Link	unprocessable
kos-20181231_def.xml	Edgar Link	unprocessable
kos-20181231_lab.xml	Edgar Link	unprocessable
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kos_logoa04.jpg	Edgar Link	pending
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$KOS
Kosmos Energy Ltd. Stock $kos

2018 Q4 Form 10-K Financial Statement

#000150999119000063 Filed on March 01, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS Kosmos Energy Ltd. Stock $kos

2018 Q4 Form 10-K Financial Statement

#000150999119000063 Filed on March 01, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS
Kosmos Energy Ltd. Stock $kos