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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Bunker swaps and Forward Purchase Agreements (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Summary of Significant Accounting Policies |  |  |  |  |
Fair value of derivative instruments | $ 3,894 |  | $ 3,894 |  |
Prepaid expenses and other current assets | Bunker Swap and Forward Fuel Purchase Agreements |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |
Fair value of derivative instruments | 1,853 |  | 1,853 |  | $ 113
Accounts payable and accrued expenses | Bunker Swap and Forward Fuel Purchase Agreements |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |
Fair value of liability position | 0 |  | 0 |  | $ 20
Other income | Bunker Swap and Forward Fuel Purchase Agreements |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |
Realized gains | 667 | $ 60 | 1,296 | $ 215 |
Unrealized gains (losses) | $ 321 | $ 168 | $ 1,760 | $ 52 |

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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