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Description of Business - Additional Information (Details) - IPO - Class A Common Stock - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended |
--- | --- | --- | ---
Feb. 06, 2017 | Mar. 31, 2017 | Aug. 11, 2017
Subsidiary, Sale of Stock [Line Items] |  |  |
Shares sold in initial public offering (in shares) | 35,000,000 |  |
Sale price of common stock in IPO (in dollars per share) | $ 14.00 |  | $ 14.00
Net proceeds from initial public offering |  | $ 456,359 |

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