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Income Taxes - Narrative (Details) - USD ($)
 12 Months Ended
Jun. 08, 2016
Apr. 01, 2016
Feb. 03, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Aug. 01, 2014
Operating Loss Carryforwards [Line Items]              
Income tax rate       13.70% 7.10%    
Statutory income rate       35.00% 34.00%    
Current deferred tax liabilities         $ 900,000    
Net deferred tax asset       $ 54,109,000 22,527,000    
Income tax penalties and interest expense       0 0 $ 0  
Income tax penalties and interest liability       0 0 0  
Unrecognized tax benefits       0 0 $ 0  
Number of shares of common stock exchanged (in shares) 500,000 1,725,000 1,000,000        
Deferred tax assets [1]       55,047,000 23,380,000    
Deferred tax liability [1]       938,000 853,000    
Federal              
Operating Loss Carryforwards [Line Items]              
Net operating loss carryforwards       6,500,000      
State              
Operating Loss Carryforwards [Line Items]              
Net operating loss carryforwards       6,400,000      
NuDevco              
Operating Loss Carryforwards [Line Items]              
Net deferred tax asset             $ 15,600,000
NuDevco | Tax Receivable Agreement              
Operating Loss Carryforwards [Line Items]              
Long-term liability       49,900,000 20,700,000   20,700,000
Long-term deferred tax asset             $ 7,900,000
Deferred Tax Assets, Gross, Noncurrent       $ 20,000,000      
Retailco | Affiliated Entity              
Operating Loss Carryforwards [Line Items]              
Number of shares of common stock exchanged (in shares) 500,000 1,725,000 1,000,000        
Deferred Tax Assets, Investment Purchase in Affiliate $ 5,300,000 $ 7,600,000 $ 8,000,000        
Deferred Tax Liabilities, Gross, Noncurrent 6,900,000 10,300,000 $ 10,300,000        
Deferred Tax Assets, Gross, Noncurrent $ 2,600,000 $ 3,900,000          
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2015-17              
Operating Loss Carryforwards [Line Items]              
Deferred tax assets         23,400,000    
Deferred tax liability         $ 900,000    
[1] See Note 4 "Equity" for disclosure of our variable interest entity in Spark HoldCo, LLC.