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