Annual report pursuant to Section 13 and 15(d)

Equity Method Investment (Details)

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Equity Method Investment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 21, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
[1]
Schedule of Equity Method Investments [Line Items]        
Cash paid to acquire a business   $ 0 $ 20,824 $ 42,008
Payments to acquire equity method investments   (680) (702) $ 0
Brim Acquisitions LLC        
Schedule of Equity Method Investments [Line Items]        
Initial capital of acquisition $ 2,000      
Carrying value of equity method investment   2,600 1,000  
Other income (loss)   1,000 $ (20)  
Payments to acquire equity method investments   $ (700)    
Cobra Aviation Services LLC | Brim Acquisitions LLC        
Schedule of Equity Method Investments [Line Items]        
Economic interest 49.00%      
Cobra Aviation Services LLC | Brim Equipment Assets        
Schedule of Equity Method Investments [Line Items]        
Cash paid to acquire a business $ 2,000      
Wexford Partners Investment Co. LLC | Brim Acquisitions LLC        
Schedule of Equity Method Investments [Line Items]        
Economic interest 51.00%      
[1] (a) Financial information includes the results attributable to Sturgeon for the entire period presented. See Note 4.