Capital Structure - (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2015 shares	Dec. 31, 2016 Vote class
Class Of Stock [Line Items]
Number of classes of common stock | class		2
Number of votes for common class holders, as a multiple of the aggregate number of Common Units in RMCO held by the holder upon occurrence of certain events (as a percent)		1
Ownership percentage		30.00%
RMCO, LLC | RIHI
Class Of Stock [Line Items]
Redemption of common membership units price per common stock (in units) | shares	5,175,000
Common Class B | RMCO, LLC
Class Of Stock [Line Items]
Number of votes for common class holders, for each Common Unit in RMCO held by the holder (in votes)		2
Ratio of votes in parent company to number of L L C common units held		2
Common Units | RMCO, LLC
Class Of Stock [Line Items]
Number of votes for common class holders, as a multiple of the aggregate number of Common Units in RMCO held by the holder (as a percent)		1
Common Class A
Class Of Stock [Line Items]
Number of votes per share held		1