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LEASES - Narratives (Details)	Jun. 30, 2019 aircraft
Leases [Abstract]
Number of lease aircrafts (aircraft)	335
Number of lease aircrafts, finance (aircraft)	34
Number of lease aircrafts, operating (aircraft)	12
Number of lease aircrafts, short-term (aircraft)	289

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- Definition

Number of Leased Aircrafts

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- Definition

Number of Leased Aircrafts, Finance Lease

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- Definition

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- Definition

Number of Leased Aircrafts, Short-term

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