Quarterly report pursuant to Section 13 or 15(d)

LEASES - Narrative (Details)

v3.20.1
LEASES - Narrative (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
helicopter
Mar. 31, 2019
USD ($)
helicopter
Dec. 31, 2019
USD ($)
helicopter
Dec. 31, 2018
helicopter
Property, Plant and Equipment [Line Items]        
Operating lease expense $ 1.0 $ 0.9    
Short-term lease cost 0.4 0.3    
Cash paid for amounts included in the measurement of lease liabilities $ 0.6 $ 0.5    
Number of helicopter dispositions | helicopter 0 0 2 6
Interest income $ 0.3      
Sales-type lease receivables $ 13.4      
H225 Helicopters        
Property, Plant and Equipment [Line Items]        
Proceeds from disposition of property and equipment     $ 5.0  
Minimum        
Property, Plant and Equipment [Line Items]        
Remaining lease term 1 year      
Maximum        
Property, Plant and Equipment [Line Items]        
Remaining lease term 59 years