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Segments - Reconciliation of Revenues from Reportable Segments to Consolidated Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |  |
Revenues | $ 23,043 | $ 32,448 | $ 82,364 | $ 117,389
Other revenues, including from other operating segments |  |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |  |
Revenues | 5,396 | 6,916 | 19,504 | 27,497
Elimination of intersegment revenues |  |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |  |
Revenues | (3,873) | (1,618) | (13,032) | (5,913)
Total revenues from reportable segments |  |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |  |
Revenues | $ 21,520 | $ 27,150 | $ 75,892 | $ 95,805

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