Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Narrative (Details)

v3.19.2
Related Party Transactions - Narrative (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Dec. 21, 2018
USD ($)
helicopter
Apr. 06, 2018
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Related Party Transaction [Line Items]            
Contributions to equity investee         $ 680 $ 0
Percentage of ownership 100.00% 100.00%        
Cobra Aviation Services LLC            
Related Party Transaction [Line Items]            
Number of assets purchased | helicopter     2      
Brim Acquisitions LLC            
Related Party Transaction [Line Items]            
Initial capital of acquisition     $ 2,000      
Contributions to equity investee         $ 700  
Brim Acquisitions LLC | Cobra Aviation Services LLC            
Related Party Transaction [Line Items]            
Equity method investment, ownership percentage     49.00%      
Brim Acquisitions LLC | Wexford            
Related Party Transaction [Line Items]            
Equity method investment, ownership percentage     51.00%      
Wexford            
Related Party Transaction [Line Items]            
Percentage of ownership 48.90% 49.00%   49.00% 49.00%