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Acquisitions - Acquisition of Provider Companies - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 01, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | [2] | Dec. 31, 2014 | Aug. 23, 2016
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration - earnout obligations incurred in connection with the Provider Companies and Major Energy Companies acquisitions |  | $ 18,936 | [1] | $ 0 | $ 0 |
Installment consideration payment |  | 1,890 | [1] | 0 | 0 |
Installment payment |  | 66,652 | [1] | 49,826 | 44,000 |
Common Class B |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Issuance of Class B common stock to affiliates for Major Energy Companies acquisition |  | 40,000 | [1] | $ 0 | $ 0 |
Share price (in dollars per share) | $ 20 |  |  |  |  | $ 20
Provider Companies |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Purchase price | $ 34,100 |  |  |  |  |
Initial working capital estimate | 1,300 |  |  |  |  |
Earnout maximum | 9,000 |  |  |  |  |
Installment consideration payment | 3,800 |  |  |  |  |
Installment payment | $ 400 |  |  |  |  |
Revenue |  | 46,800 |  |  |  |
Operating loss |  | $ 12,800 |  |  |  |
Provider Companies | Common Class B |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Shares issued (shares) | 699,742 |  |  |  |  |
Issuance of Class B common stock to affiliates for Major Energy Companies acquisition | $ 14,000 |  |  |  |  |
Revolving Credit Facility | Acquisition Line | Provider Companies |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Borrowing from credit facility | $ 10,600 |  |  |  |  |
[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.

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