Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities - Narrative (Details)

v3.21.1
Variable Interest Entities - Narrative (Details) - helicopter
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Variable Interest Entity [Line Items]    
Percentage of ownership 100.00% 100.00%
Leopard Aviation LLC    
Variable Interest Entity [Line Items]    
Number of helicopters owned 1  
Dire Wolf Energy Services LLC | Cobra Aviation Services LLC    
Variable Interest Entity [Line Items]    
Interest transferred 100.00%  
Predator Aviation LLC | Leopard Aviation LLC    
Variable Interest Entity [Line Items]    
Interest transferred 100.00%  
Cobra Aviation Services LLC    
Variable Interest Entity [Line Items]    
Number of helicopters 2  
ARS    
Variable Interest Entity [Line Items]    
Percentage of ownership 100.00%  
Brim Acquisitions LLC    
Variable Interest Entity [Line Items]    
Percentage of ownership 49.00%