Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - ARS and Brim Equipment Acquisition Narrative (Details)

v3.19.2
Acquisitions - ARS and Brim Equipment Acquisition Narrative (Details)
$ in Thousands
6 Months Ended
Dec. 21, 2018
USD ($)
helicopter
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Business Acquisition [Line Items]      
Cash paid to acquire a business   $ 0 $ 13,356
Cobra Aviation Services LLC      
Business Acquisition [Line Items]      
Number of assets purchased | helicopter 2    
Cobra Aviation Services LLC | ARS      
Business Acquisition [Line Items]      
Cash paid to acquire a business $ 2,400    
Consideration to be paid upon completion of contractual obligations 300    
Purchase price 4,200    
Brim Acquisitions LLC      
Business Acquisition [Line Items]      
Initial capital of acquisition $ 2,000    
Brim Acquisitions LLC | Cobra Aviation Services LLC      
Business Acquisition [Line Items]      
Equity method investment, ownership percentage 49.00%    
Brim Acquisitions LLC | Wexford      
Business Acquisition [Line Items]      
Equity method investment, ownership percentage 51.00%