Quarterly report pursuant to Section 13 or 15(d)

LEASES - Narrative (Details)

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LEASES - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Leases [Abstract]        
Variable lease payments $ 4,600 $ 4,300 $ 9,000 $ 8,900
Lessee, Lease, Description [Line Items]        
Costs 18,944 15,463 33,339 30,065
Aircraft and Operating Facilities        
Lessee, Lease, Description [Line Items]        
Costs 15,800 13,700 28,300 26,800
Corporate Headquarters and Other Office Space        
Lessee, Lease, Description [Line Items]        
Costs $ 3,100 $ 1,600 $ 5,100 $ 3,200