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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2017
Other Commitments [Line Items] |  |  |  |  |
Proceeds from legal settlements | $ 12,800 |  |  |  |
Expected future capital expenditures | $ 1,285 | $ 3,033 | $ 3,261 | $ 3,466 |
Scenario, Forecast | Minimum |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Expected future capital expenditures |  |  |  |  | $ 5,000
Scenario, Forecast | Maximum |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Expected future capital expenditures |  |  |  |  | $ 10,000

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