Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

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Subsequent Events (Details) - Subsequent Event - USD ($)
$ / shares in Units, $ in Thousands
Oct. 03, 2017
Oct. 02, 2017
Subsequent Event [Line Items]    
Stock options granted (in shares)   621,747
IPO    
Subsequent Event [Line Items]    
Price of shares issued (usd per share) $ 17.50  
Shares issued (shares) 29,000,000  
Proceeds from initial public offering $ 480,525  
Restricted Stock Units    
Subsequent Event [Line Items]    
Equity instruments other than options, grants in period (in shares)   1,654,685
Stock Awards    
Subsequent Event [Line Items]    
Equity instruments other than options, grants in period (in shares)   21,067