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Capital Structure - Secondary Offerings (Details) - Class A | 1 Months Ended
--- | ---
May 31, 2018 $ / shares shares
Class of Stock [Line Items] |
Number of shares issued (in shares) | 17,250,000
Purchase price per share (in dollars per share) | $ / shares | $ 27.16
Offering price per share (in dollars per share) | $ / shares | $ 28.00
Number of shares of stock issued (in shares) | 10,518,750
Selling Stockholders |
Class of Stock [Line Items] |
Number of shares of stock issued (in shares) | 6,731,250
Number of shares issued upon exercise of stock options (in shares) | 2,081,250

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