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The Company (Details)
Sep. 16, 2016
$ / shares
shares
Jul. 05, 2016
$ / shares
shares
Jul. 27, 2015
employee
$ / shares
shares
Sep. 30, 2016
subsidiary
Subsidiary, Sale of Stock [Line Items]        
Number of wholly-owned subsidiaries | subsidiary       5
Number of shares issued to non-management employees     30,682  
Number of non-management employees receiving shares | employee     1,700  
IPO and IPO Over-Allotment        
Subsidiary, Sale of Stock [Line Items]        
Number of shares sold     38,906,286  
Initial public offering share price (in usd per share) | $ / shares     $ 20.00  
IPO Over-allotment option        
Subsidiary, Sale of Stock [Line Items]        
Number of shares sold     5,074,732  
SPO and SPOf Over-Allotment        
Subsidiary, Sale of Stock [Line Items]        
Number of shares sold 14,300,000 17,250,000    
Initial public offering share price (in usd per share) | $ / shares $ 25.62 $ 22.00    
SPO Over-Allotment        
Subsidiary, Sale of Stock [Line Items]        
Number of shares sold   2,250,000