Business and Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended		9 Months Ended	1 Months Ended
	Sep. 30, 2013	Oct. 07, 2013 Subsequent Event Common Class A	Oct. 07, 2013 IPO	Sep. 30, 2013 IPO	Sep. 30, 2013 IPO	Oct. 07, 2013 IPO Subsequent Event	Oct. 07, 2013 IPO Subsequent Event Common Class A	Sep. 30, 2013 RMCO	Oct. 07, 2013 RMCO IPO Subsequent Event	Oct. 07, 2013 RMCO IPO Subsequent Event Common Class A
Organization And Basis Of Presentation [Line Items]
Common stock, shares issued	1						11,500,000			11,500,000
Common stock at public offering price per share		$ 22.00					$ 22.00			$ 22.00
Offering expenses			$ 632,500	$ 76,000	$ 216,000	$ 17,077,500		$ 4,816,000	$ 11,000,000