BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill and Other Intangible Assets (Details)	12 Months Ended
Dec. 31, 2020 segment aircraft
Goodwill and Other Intangible Assets
Number of reporting units \| segment	2
Cargo
Goodwill and Other Intangible Assets
Number of aircrafts operated \| aircraft	12

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration