Quarterly report pursuant to Section 13 or 15(d)

REVENUE RECOGNITION - Narrative (Details)

v3.20.2
REVENUE RECOGNITION - Narrative (Details)
 3 Months Ended
Jun. 30, 2020
USD ($)
contract
Jun. 30, 2019
USD ($)
Mar. 31, 2020
USD ($)
Disaggregation of Revenue [Line Items]      
Types of contracts | contract 2    
Revenue recognized $ 2,500,000    
Contract with customer, liability 7,300,000   $ 4,900,000
Contract with customer, asset, after allowance for credit loss 0   0
Contract with customer, performance obligation satisfied in previous period $ 800,000 $ 0  
Number of capitalized contracts | contract 2    
Low      
Disaggregation of Revenue [Line Items]      
Period of service 1 year    
Contract termination notice period 30 days    
High      
Disaggregation of Revenue [Line Items]      
Period of service 5 years    
Contract termination notice period 365 days    
Revenue      
Disaggregation of Revenue [Line Items]      
Accounts receivable $ 150,900,000   $ 148,300,000
Helicopter contracts | Low      
Disaggregation of Revenue [Line Items]      
Invoicing payment due period 30 days    
Helicopter contracts | High      
Disaggregation of Revenue [Line Items]      
Invoicing payment due period 60 days