Quarterly report pursuant to Section 13 or 15(d)

LEASES - Narrative (Details)

v3.21.2
LEASES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Lessee, Lease, Description [Line Items]        
Variable lease, payment $ 3,200 $ 2,700 $ 12,100 $ 7,900
Lease, cost 15,974 9,950 46,039 27,520
Aircraft and Operating Facilities        
Lessee, Lease, Description [Line Items]        
Lease, cost 14,400 8,100 41,100 22,400
Corporate Headquarters and Other Office Space        
Lessee, Lease, Description [Line Items]        
Lease, cost $ 1,600 $ 1,800 $ 4,700 $ 5,000