Redeemable Preferred Units and Members' Deficit - Additional Information (Detail) (RMCO, USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Changes In Equity And Comprehensive Income Line Items [Line Items]
Preferred Units, authorized	150,000
Preferred units, redemption date	Apr. 16, 2014
Preferred Units, issued	150,000
Preferred Units, outstanding	150,000
Entitle to receive cumulative preferential	10.00%
Preferred equity holder's liquidation preference	$ 49,850,000
Redemption of commom membership units amount less underwriting discount	76,931,250
Accumulated other comprehensive income	$ 1,563,000	$ 1,747,000
Common Class B
Changes In Equity And Comprehensive Income Line Items [Line Items]
Common stock, shares authorized	900,000
Common stock reserved for issuance under a unit option plan	52,500
Options granted to certain employees	31,500
Common stock, shares outstanding	847,500