Business and Organization (Details)			1 Months Ended	12 Months Ended
	Nov. 24, 2013 USD ($) $ / shares shares	Oct. 07, 2013 USD ($) $ / shares shares	Oct. 31, 2013	Dec. 31, 2015 shares	Dec. 31, 2013 USD ($)	Nov. 24, 2015 shares	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Minority economic interest in RMCO (as a percent)				58.33%
Preferred units, liquidation preference value		$ 49,850,000
Stock split, conversion ratio				0.25
Options to acquire shares granted | shares	675,000
Proceeds from issuance of Class A common stock in initial public offering		253,000,000			$ 235,922,000
Net proceeds from Initial Public Offering		235,922,500
Stock offering expenses					$ 5,972,000
Net proceeds received from IPO		$ 208,617,500
Number of common units purchased | shares		10,169,023
Portion of IPO proceeds reserved to pay for IPO expenses	$ 6,885,000
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross | shares	675,000
IPO
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Stock offering expenses		$ 17,077,500
Proceeds from the IPO to reacquire business		$ 27,305,000
RIHI
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Redemption Of Common Membership Stock Units | shares						4,500,000
Redemption Of Common Membership Units Amount	$ 23,267,000
RMCO, LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Minority economic interest in RMCO (as a percent)		39.56%		58.33%			39.89%
Stock split, conversion ratio			25
Stock offering expenses		$ 5,972,000
Stock offering expenses		11,000,000
Remaining proceeds from IPO		$ 197,617,500
Redemption Of Common Membership Stock Units | shares		3,750,000
Redemption Of Common Membership Units Amount		$ 76,931,250
Class A common stock
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock at public offering price per share | $ / shares	$ 36.00
Stock split, conversion ratio		1
Options to acquire shares granted | shares				787,500
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross | shares				787,500
New options issued to replace old options | shares				787,500
Class A common stock | IPO
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Issuance of common stock (in shares) | shares		11,500,000
Common stock at public offering price per share | $ / shares		$ 22.00
Class A common stock | RIHI
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Portion used for redemption of preferred membership interest and common units	$ 155,115,000
Class A common stock | RMCO, LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Stock split, conversion ratio	1