Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investment - Narrative (Details)

v3.21.1
Equity Method Investment - Narrative (Details)
$ in Millions
3 Months Ended
Dec. 21, 2018
USD ($)
helicopter
Mar. 31, 2021
USD ($)
helicopter
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Cobra Aviation Services LLC        
Schedule of Equity Method Investments [Line Items]        
Number of helicopters | helicopter   2    
Brim Acquisitions LLC        
Schedule of Equity Method Investments [Line Items]        
Number of helicopters | helicopter   4    
Number of leases | helicopter 5      
Brim Equipment Assets | Cobra Aviation Services LLC        
Schedule of Equity Method Investments [Line Items]        
Cash paid to acquire a business $ 2.0      
Brim Acquisitions LLC        
Schedule of Equity Method Investments [Line Items]        
Contributions to equity investee $ 2.0      
Difference between carrying amount and underlying equity   $ 3.1   $ 3.7
Adjustment to income (loss) on equity investee   $ (0.6) $ 0.4  
Brim Acquisitions LLC | Cobra Aviation Services LLC        
Schedule of Equity Method Investments [Line Items]        
Equity method investment, ownership percentage 49.00%      
Brim Acquisitions LLC | Wexford        
Schedule of Equity Method Investments [Line Items]        
Equity method investment, ownership percentage 51.00%