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Business Combinations - Kern Acquisition (Details) - USD ($)
$ in Thousands
Jun. 09, 2017
Feb. 24, 2017
Nov. 30, 2016
Sep. 09, 2016
Jan. 27, 2016
Jan. 26, 2016
Jun. 24, 2015
Business Acquisition [Line Items]              
Property and equipment             $ 56,497
Kern Acquisition              
Business Acquisition [Line Items]              
Net assets acquired $ 3,200 $ 6,000 $ 8,400 $ 9,200 $ 4,900    
Kern Phase 2(b)              
Business Acquisition [Line Items]              
Property and equipment   12,477          
Related party payable   (4,892)          
Asset retirement obligation   (493)          
Noncontrolling interest   (1,078)          
Net assets acquired   $ 6,014          
Kern Phase 2(c)              
Business Acquisition [Line Items]              
Property and equipment 6,464            
Related party payable (2,372)            
Asset retirement obligation (279)            
Noncontrolling interest (658)            
Net assets acquired $ 3,155            
Kern Phase 1(a)              
Business Acquisition [Line Items]              
Property and equipment           $ 9,510  
Related party payable           (3,435)  
Asset retirement obligation           (322)  
Noncontrolling interest           (866)  
Net assets acquired           $ 4,887  
Kern Phase 1(b)              
Business Acquisition [Line Items]              
Property and equipment       18,856      
Related party payable       (7,123)      
Asset retirement obligation       (785)      
Noncontrolling interest       (1,794)      
Net assets acquired       $ 9,154      
Kern Phase 2(a)              
Business Acquisition [Line Items]              
Property and equipment     15,659        
Related party payable     (5,290)        
Asset retirement obligation     (623)        
Noncontrolling interest     (1,332)        
Net assets acquired     $ 8,414