Organization - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended
	Sep. 30, 2013	Oct. 07, 2013 Subsequent Event Common Class A	Oct. 07, 2013 IPO Subsequent Event Common Class A
Organization And Basis Of Presentation [Line Items]
Percentage of common membership units in subsidiaries	39.56%
Common stock, shares issued	1		11,500,000
Common stock at public offering price per share		$ 22.00	$ 22.00