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Other Commitments and Contingencies - Narrative (Details) $ / shares in Units, $ in Thousands, € in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2018 $ / shares shares | Sep. 30, 2019 USD ($) tax_lease shares | Sep. 30, 2019 GBP (£) tax_lease | Dec. 31, 2003 GBP (£) tax_lease | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 EUR (€) shares | Apr. 30, 2019 USD ($) | Dec. 31, 2018 USD ($) shares
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of tax leases | tax_lease |  |  |  | 6 |  |  |  |  |
Gross cash benefit received from tax leases | £ |  |  |  | £ 41,000,000 |  |  |  |  |
Number of tax leases terminated | tax_lease |  | 5 | 5 |  |  |  |  |  |
Number of tax leases remaining | tax_lease |  | 1 | 1 |  |  |  |  |  |
Contractual obligation |  | $ 1,142,200 |  |  |  |  |  | $ 1,300,000 |
Minimum |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Estimate of possible exposure | £ |  |  | £ 0 |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Estimate of possible exposure | £ |  |  | £ 115,000,000.0 |  |  |  |  |  |
Shareholders' Agreement, Project to Fund Development of Pipeline Infrastructure and FSRU |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligation | € |  |  |  |  |  |  | € 1.0 |  |
Shareholders' Agreement, Project to Fund Development of Pipeline Infrastructure and FSRU | Maximum |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligation | € |  |  |  |  |  |  | € 15.0 |  |
ECGS |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Commitments and contingencies |  | $ 1,000 |  |  |  |  |  |  |
Avenir |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares | 110,000,000 |  |  |  |  |  |  |  |
Common stock, par value per share (in dollars per share) | $ / shares | $ 1.00 |  |  |  |  |  |  |  |
Margin loan facility | Golar Partners, Common Units |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of common units pledged as security (in shares) | shares |  | 21,226,586 |  |  |  |  | 21,226,586 |  | 21,226,586
Avenir |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Investment company, future amount |  |  |  |  |  |  |  |  | $ 18,000
Avenir | Founding Partners |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Investment company, future amount |  |  |  |  |  |  |  |  | $ 72,000
Stolt-Nielsen Ltd and Höegh LNG Holdings Ltd | Avenir |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Committed capital |  | $ 182,000 |  |  |  |  |  |  |
Other Operating Income (Expense) |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Loss contingency, receivable, proceeds |  | 9,300 |  |  |  |  |  |  |
Golar Viking Conversion |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Insurance gain |  | $ 2,800 |  |  |  |  |  |  |
Golar Viking Conversion | Scenario, Forecast |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Long term purchase commitments |  |  |  |  | $ 87,000 | $ 4,300 |  |  |

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