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OTHER OPERATING GAINS - Summary of Contracts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
GAIN ON SALE OF ASSETS AND AMORTIZATION OF DEFERRED GAINS [Abstract] |  |  |
Insurance recoveries | $ 3,737 | $ 0 | $ 0
Other gains | 628 | 0 | 0
Gain on termination of vessel leases | 0 | 10,324 | 2,379
Gain (loss) on pool arrangements | (943) | (118) | 2
Other operating (losses) gains | $ 3,422 | $ 10,206 | $ 2,381

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- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77888415&loc=SL77918607-209975 + Details
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