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Basis of Presentation and Summary of Significant Accounting Policies - Trademarks (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]        
Asset optimization revenue $ 133,000,000 $ 154,100,000 $ 284,600,000  
Cost of revenues 133,600,000 152,600,000 282,300,000  
Bad debt expense 1,261,000 [1] 7,908,000 [2] 10,164,000  
Intangible assets, current [3] 12,113,000 6,627,000    
Customer relationships, net [3] 21,410,000 6,802,000    
Intangible assets 39,862      
Amortization expense 0 0 0  
Impairment charges 0      
Trademarks        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets 6,339,000 1,194,000 0 $ 0
Amortization expense $ 357,000 74,000 0  
Impairment charges   $ 0 $ 0  
[1] Financial information has been recast to include results attributable to the acquisition of the Major Energy Companies from an affiliate on August 23, 2016. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.
[2] Financial information has been recast to include results attributable to the acquisition of Oasis Power Holdings LLC by an affiliate on May 12, 2015. See Notes 2 "Basis of Presentation and Summary of Significant Accounting Policies" for further discussion.
[3] See Note 4 "Equity" for disclosure of our variable interest entity in Spark HoldCo, LLC.