Annual report pursuant to Section 13 and 15(d)

Acquisitions - WTL Oil Acquisition Narrative (Details)

v3.19.1
Acquisitions - WTL Oil Acquisition Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
May 31, 2018
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
 [1]
Dec. 31, 2016
 [2]
Business Acquisition [Line Items]          
Cash paid to acquire a business     $ 20,824 $ 42,008 $ 0
WTL Oil LLC          
Business Acquisition [Line Items]          
Total purchase price $ 5,500        
Consideration receivable $ 600        
Cash paid to acquire a business   $ 600      
Acquisition related costs     $ 100    
[1] Financial information includes the results attributable to Sturgeon for the entire period presented. See Note 4.
[2] Financial information has been recast to include results attributable to Sturgeon. See Note 4.