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Financial Instruments - Carrying Values and Estimated Fair Values (Details) shares in Thousands, $ in Thousands | Jun. 30, 2021 USD ($) shares | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
--- | --- | --- | --- | ---
Non-Derivatives: |  |  |  |
Cash and cash equivalents | $ 207,272 | $ 127,691 | $ 128,661 | $ 222,123
Equity securities, current, fair value | 660,642 | 0 |  |
Current portion of long-term debt and short-term debt, carrying value | (1,323,098) | (982,845) |  |
Long-term debt | (1,056,483) | (1,367,937) |  |
Derivatives: |  |  |  |
Dividends receivable | 1,900 |  |  |
Deferred finance charges | $ 26,417 | 28,749 |  |
Measurement Input, Discount Rate |  |  |  |
Derivatives: |  |  |  |
Measurement input | 0.0664 |  |  |
New Fortress Energy (NFE) |  |  |  |
Derivatives: |  |  |  |
Equity instrument (in shares) | shares | 18,600 |  |  |
Dividends receivable | $ 1,900 |  |  |
Carrying value | Level 1 |  |  |  |
Non-Derivatives: |  |  |  |
Cash and cash equivalents | 207,272 | 127,691 |  |
Restricted cash and short-term deposits, carrying value | 131,268 | 163,181 |  |
Carrying value | Level 2 |  |  |  |
Non-Derivatives: |  |  |  |
Equity securities, current, fair value | 658,779 | 0 |  |
Current portion of long-term debt and short-term debt, carrying value | (933,966) | (984,510) |  |
Short-term debt - convertible bonds, carrying value | (391,815) | 0 |  |
Long-term debt - convertible bonds, carrying value | 0 | (383,740) |  |
Long-term debt | $ (1,080,217) | (1,011,281) |  |
Carrying value | Level 2 | Measurement Input, Discount Rate |  |  |  |
Derivatives: |  |  |  |
Measurement input | 0.0664 |  |  |
Carrying value | Level 2 | New Fortress Energy (NFE) |  |  |  |
Non-Derivatives: |  |  |  |
Equity securities, current, fair value | $ 658,800 |  |  |
Carrying value | Level 2 | Oil Derivative |  |  |  |
Derivatives: |  |  |  |
Derivative asset | 81,730 | 540 |  |
Carrying value | Level 2 | Interest Rate Swaps |  |  |  |
Derivatives: |  |  |  |
Derivative liability | (27,512) | (44,315) |  |
Carrying value | Level 2 | Foreign Exchange Swaps |  |  |  |
Derivatives: |  |  |  |
Foreign exchange swaps liability | 0 | (1,310) |  |
Fair value | Level 1 |  |  |  |
Non-Derivatives: |  |  |  |
Cash and cash equivalents, fair value | 207,272 | 127,691 |  |
Restricted cash and short-term deposits, fair value | 131,268 | 163,181 |  |
Fair value | Level 2 |  |  |  |
Non-Derivatives: |  |  |  |
Equity securities, current, fair value | 658,779 | 0 |  |
Current portion of long-term debt and short-term debt, fair value | (933,966) | (984,510) |  |
Short-term debt - convertible bonds, fair value | (399,240) | 0 |  |
Long-term debt - convertible bonds, fair value | 0 | (366,581) |  |
Long-term debt, fair value | (1,080,217) | (1,011,281) |  |
Fair value | Level 2 | Oil Derivative |  |  |  |
Derivatives: |  |  |  |
Derivative asset | 81,730 | 540 |  |
Fair value | Level 2 | Interest Rate Swaps |  |  |  |
Derivatives: |  |  |  |
Derivative liability | (27,512) | (44,315) |  |
Fair value | Level 2 | Foreign Exchange Swaps |  |  |  |
Derivatives: |  |  |  |
Foreign exchange swaps liability | $ 0 | $ (1,310) |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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