Business and Organization - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended				1 Months Ended	12 Months Ended
	Oct. 31, 2013	Oct. 07, 2013	Dec. 31, 2013	Dec. 31, 2013 Common Class A	Oct. 07, 2013 Common Class A	Dec. 31, 2012 Common Class A	Oct. 07, 2013 IPO	Dec. 31, 2013 IPO
Minority Interest [Line Items]
Preferred units, liquidation preference value		$ 49,850,000
Stock split, conversion ratio	25
Options to acquire shares granted	787,500
Proceeds from Initial Public Offering							253,000,000
Net proceeds from Initial Public Offering							235,922,500
Underwriting discounts and commissions							17,077,500
Proceeds from the IPO to reacquire business							27,305,000
RMCO common units purchased in connection with contributed assets							1,330,977
Net proceeds received from IPO		208,617,500
Number of common units purchased		10,169,023
Stock offering expenses		5,972,000	5,972,000				11,000,000	848,500
Remaining proceeds from IPO		$ 197,617,500
Amount of cash savings in taxes, noncontrolling interest percentage			85.00%
Amount of cash savings in taxes, parent percentage			15.00%
Common stock, shares issued				11,607,971	11,500,000	0
Common stock at public offering price per share					$ 22.00
Percentage of common membership units in subsidiaries			39.56%