Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Schedule Of Changes in Goodwill (Details)

v3.19.1
Goodwill and Intangible Assets - Schedule Of Changes in Goodwill (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill [Roll Forward]      
Goodwill, period start $ 99,811,000 $ 88,727,000  
Impairment (3,203,000) 0 $ 0
Goodwill, period end 101,245,000 99,811,000 $ 88,727,000
Stingray Acquisitions      
Goodwill [Roll Forward]      
Additions   10,193,000  
Higher Power      
Goodwill [Roll Forward]      
Additions   643,000  
5 Star      
Goodwill [Roll Forward]      
Additions   $ 248,000  
WTL Oil LLC      
Goodwill [Roll Forward]      
Additions 1,567,000    
RTS Energy Services LLC      
Goodwill [Roll Forward]      
Additions 133,000    
ARS      
Goodwill [Roll Forward]      
Additions 694,000    
Brim Equipment Assets      
Goodwill [Roll Forward]      
Additions $ 2,243,000