Non-controlling Interest - Additional Information (Detail) (USD $)	3 Months Ended				3 Months Ended		1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Non-controlling Interest	Mar. 31, 2014 Non Controlling Unitholders Agreement	Mar. 31, 2013 Non Controlling Unitholders Agreement	Apr. 17, 2014 Non Controlling Unitholders Agreement Subsequent Event	May 08, 2014 Non Controlling Unitholders Agreement Subsequent Event
Minority Interest [Line Items]
Percentage of common membership units in subsidiaries	39.56%
Total percentage of common stock units				60.44%
Distributions paid to non-controlling unitholders	$ 2,552,000	$ 10,000			$ 2,552,000	$ 0	$ 1,108,000
Distributions declared to non-controlling unitholders								1,108,000
Distributions to noncontrolling unitholders description					Cash distributions were also required to be made to non-controlling unitholders in an amount equal to the lesser of (1) the amount of excess cash flow payment required to be paid as a mandatory prepayment pursuant to the Company’s previous senior secured credit facility and (2) $8,000,000 in accordance with the Old RMCO, LLC Agreement.
Principal excess cash flow prepayments		8,000,000				8,000,000
Tax benefit from tax receivable agreements	68,840,000
Current portion of payable to related parties pursuant to tax receivable agreements	$ 902,000		$ 902,000