Quarterly report pursuant to Section 13 or 15(d)

LEASES - Narrative (Details)

v3.19.2
LEASES - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
helicopter
Jun. 30, 2018
helicopter
Leases [Abstract]      
Rental expense $ 0.8 $ 1.6  
Short-term lease expense 0.2 0.5  
Lease not yet commenced, future minimum payments 1.5 $ 1.5  
Number of helicopter dispositions | helicopter   6 20
Sales-type lease, interest income 0.5 $ 0.9  
Sales-type lease receivables 18.6 18.6  
Sales-type lease receivables, current 14.8 14.8  
Sales-type lease receivables, non-current $ 3.8 $ 3.8