Equity-Based Compensation Plan - Additional Information (Detail) (USD $)	1 Months Ended		9 Months Ended	12 Months Ended	1 Months Ended
	Oct. 01, 2013	Oct. 01, 2013 Subsequent Event	Sep. 30, 2013 RMCO	Dec. 31, 2012 RMCO	Oct. 01, 2013 RMCO Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Authorizes grants to purchase			52,500
Term of option cannot exceed			10 years
Additional unit options available to grant			21,000
Grant-date estimated fair value of options granted				$ 56.83
Total compensation expense			$ 701,000	$ 0
Options to acquire shares granted	787,500	787,500			787,500
Stock split		25	25		25