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ACCUMULATED OTHER COMPREHENSIVE INCOME Schedules of Accumulate Other Comprehensive Income (Loss) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Unrealized net gain (loss) on qualifying cash flow hedging instruments $ 4,671,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax $ (1,822,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax $ (6,832,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax  
Unrealized gain on available-for-sale securities 15,751,000us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 7,796,000us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 5,911,000us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax  
Losses associated with pensions, net of tax recoveries of $0.3 million (2011: $0.4 million) 15,251,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax 12,731,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax 17,809,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax  
Losses associated with pensions, net of tax recoveries of $0.2 million (2013: $0.2 million) 200,000glng_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTaxRecoveries 300,000glng_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTaxRecoveries    
Accumulated Other Comprehensive Income (Loss), Net of Tax 5,171,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (6,757,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (18,730,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (34,948,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Other comprehensive (loss) income before reclassification 8,693,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax 22,760,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax 7,229,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax  
Amount reclassified from accumulated other comprehensive income 3,235,000us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax (10,787,000)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax 8,989,000us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax  
Movement in Other comprehensive Income 11,928,000glng_MovementinOthercomprehensiveIncome 11,973,000glng_MovementinOthercomprehensiveIncome 16,218,000glng_MovementinOthercomprehensiveIncome  
Gain (losses) on available-for-sale securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 15,751,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
7,796,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
5,911,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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0us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Other comprehensive (loss) income before reclassification 7,955,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
12,680,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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5,911,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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Amount reclassified from accumulated other comprehensive income 0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
(10,795,000)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
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0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
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Movement in Other comprehensive Income 7,955,000glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
1,885,000glng_MovementinOthercomprehensiveIncome
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= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
5,911,000glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
 
Pension and post retirement benefit plan adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax (15,251,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(12,731,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(17,809,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(15,486,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Other comprehensive (loss) income before reclassification (2,520,000)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
5,078,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(2,323,000)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
 
Amount reclassified from accumulated other comprehensive income 0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
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0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
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Movement in Other comprehensive Income (2,520,000)glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
5,078,000glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(2,323,000)glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
 
Gains (losses) on cash flow hedges        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 4,042,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
(2,676,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
(6,832,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
(19,462,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Other comprehensive (loss) income before reclassification 3,483,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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4,148,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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3,641,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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Amount reclassified from accumulated other comprehensive income 3,235,000us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
8,000us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
8,989,000us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
 
Movement in Other comprehensive Income 6,718,000glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
4,156,000glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
12,630,000glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
 
Share of affiliates comprehensive income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 629,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= glng_ShareofaffilliatesothercomprehensiveincomeMember
854,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= glng_ShareofaffilliatesothercomprehensiveincomeMember
0us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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0us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Other comprehensive (loss) income before reclassification (225,000)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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= glng_ShareofaffilliatesothercomprehensiveincomeMember
854,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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0us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
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Amount reclassified from accumulated other comprehensive income 0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
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0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
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0us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
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Movement in Other comprehensive Income $ (225,000)glng_MovementinOthercomprehensiveIncome
/ us-gaap_StatementEquityComponentsAxis
= glng_ShareofaffilliatesothercomprehensiveincomeMember
$ 854,000glng_MovementinOthercomprehensiveIncome
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= glng_ShareofaffilliatesothercomprehensiveincomeMember
$ 0glng_MovementinOthercomprehensiveIncome
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