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Financial Instruments (Details) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017 | Dec. 19, 2017 | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | --- | ---
Non-Derivatives: |  |  |  |  |
Cash and cash equivalents | $ 375,067,000 | $ 214,862,000 |  | $ 343,226,000 | $ 224,190,000
Restricted cash and cash equivalents | 452,318,000 | 397,815,000 |  |  |
Debt, current |  | 1,384,933,000 |  |  |
Long-term debt | 1,855,960,000 | 1,025,914,000 |  |  |
Derivatives: |  |  |  |  |
Derivative asset | 17,879,000 | 10,166,000 |  |  |
Deferred finance charges | 18,483,000 | 24,053,000 |  |  |
Interest Rate Swaps | Cash Flow Hedging |  |  |  |  |
Derivatives: |  |  |  |  |
Notional value | $ 1,250,000,000 |  |  |  |
Interest Rate Swaps | Minimum | Cash Flow Hedging |  |  |  |  |
Derivatives: |  |  |  |  |
Fixed interest rates | 1.13% |  |  |  |
Interest Rate Swaps | Maximum | Cash Flow Hedging |  |  |  |  |
Derivatives: |  |  |  |  |
Fixed interest rates | 1.94% |  |  |  |
Carrying value | Level 1 |  |  |  |  |
Non-Derivatives: |  |  |  |  |
Cash and cash equivalents | $ 375,067,000 | 214,862,000 |  |  |
Restricted cash and cash equivalents | 452,318,000 | 397,815,000 |  |  |
Carrying value | Level 2 |  |  |  |  |
Non-Derivatives: |  |  |  |  |
Debt, current | 871,507,000 | 1,393,229,000 |  |  |
Long-term debt - convertible bonds | 346,698,000 | 340,173,000 |  |  |
Long-term debt | 1,524,963,000 | 701,498,000 |  |  |
Carrying value | Level 2 | Interest Rate Swaps |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative asset | 17,879,000 | 10,166,000 |  |  |
Carrying value | Level 2 | Foreign Exchange Swaps |  |  |  |  |
Derivatives: |  |  |  |  |
Foreign exchange swaps asset | 35,000 | 51,000 |  |  |
Foreign exchange swaps liability | 573,000 | 223,000 |  |  |
Carrying value | Level 2 | Return Equity Swap |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative liability | 44,516,000 | 40,141,000 |  |  |
Carrying value | Level 2 | Earn-out Units |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative asset | 2,900,000 | 7,400,000 |  |  |
Fair value | Level 1 |  |  |  |  |
Non-Derivatives: |  |  |  |  |
Cash and cash equivalents, fair value disclosure | 375,067,000 | 214,862,000 |  |  |
Restricted cash and cash equivalents, fair value disclosure | 452,318,000 | 397,815,000 |  |  |
Fair value | Level 2 |  |  |  |  |
Non-Derivatives: |  |  |  |  |
Debt, current, fair value disclosure | 871,507,000 | 1,393,229,000 |  |  |
Convertible debt, fair value disclosures | 437,063,000 | 430,361,000 |  |  |
Long-term debt, fair value | 1,524,963,000 | 701,498,000 |  |  |
Fair value | Level 2 | Interest Rate Swaps |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative asset | 17,879,000 | 10,166,000 |  |  |
Fair value | Level 2 | Foreign Exchange Swaps |  |  |  |  |
Derivatives: |  |  |  |  |
Foreign exchange swaps asset | 35,000 | 51,000 |  |  |
Foreign exchange swaps liability | 573,000 | 223,000 |  |  |
Fair value | Level 2 | Return Equity Swap |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative liability | 44,516,000 | 40,141,000 |  |  |
Fair value | Level 2 | Earn-out Units |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative asset | 2,900,000 | 7,400,000 |  |  |
FLNG |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative asset |  |  | $ 79,600,000 |  |
Derivative liability |  | 79,600,000 |  |  |
FLNG | Carrying value | Level 2 | Interest Rate Swaps |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative asset | 203,000,000 | 94,700,000 |  |  |
FLNG | Fair value | Level 2 | Interest Rate Swaps |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative asset | $ 203,000,000 | $ 94,700,000 |  |  |

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