Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investment - Narrative (Details)

v3.20.1
Equity Method Investment - Narrative (Details)
$ in Thousands
3 Months Ended
Dec. 21, 2018
USD ($)
Apr. 06, 2018
helicopter
Mar. 31, 2020
USD ($)
helicopter
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Schedule of Equity Method Investments [Line Items]          
Contributions to equity investee     $ 0 $ 480  
Cobra Aviation Services LLC          
Schedule of Equity Method Investments [Line Items]          
Number of helicopters | helicopter   3      
Brim Acquisitions LLC          
Schedule of Equity Method Investments [Line Items]          
Number of helicopters | helicopter     1    
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 $ 2,000        
Brim Acquisitions LLC          
Schedule of Equity Method Investments [Line Items]          
Contributions to equity investee $ 2,000        
Difference between carrying amount and underlying equity     $ 2,200   $ 2,600
Adjustment to income on equity investee     $ (400)    
Contributions to equity investee       $ 500  
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%