Non-controlling Interest - Narrative (Details) - USD ($)		1 Months Ended	12 Months Ended
	Feb. 24, 2015	Feb. 29, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 07, 2013
Significant Accounting Policies [Line Items]
Minority economic interest in RMCO (as a percent)			58.33%
Exercise of stock options, Shares			624,443
Tax distribution rate			46.20%
Distributions for taxes, non-controlling unitholders				$ 17,765,000	$ 19,614,000
Maximum cash distribution			$ 8,000,000
Other distributions, non-controlling unitholders			42,827,000	4,432,000	8,000,000
Other distributions, non-controlling unitholders, dividends			35,469,000
Other distributions, non-controlling unitholders, discretionary	$ 1,884,000		7,358,000
Distributions declared to non-controlling unitholders				0	$ 0
Current portion of payable pursuant to tax receivable agreements			8,478,000	3,914,000
Amounts paid pursuant to Tax Receivable Agreements (TRAs)			0	$ 986,000
RIHI
Significant Accounting Policies [Line Items]
Liability representing the payments due pursuant to tax receivable agreements			100,035,000
Current portion of payable pursuant to tax receivable agreements			8,478,000
RIHI | Subsequent Event
Significant Accounting Policies [Line Items]
Amounts paid pursuant to Tax Receivable Agreements (TRAs)		$ 1,344,000
RIHI | 2014 Tax Returns
Significant Accounting Policies [Line Items]
Current portion of payable pursuant to tax receivable agreements			$ 3,848,000
RMCO, LLC
Significant Accounting Policies [Line Items]
Minority economic interest in RMCO (as a percent)			58.33%	39.89%		39.56%
Non-controlling unitholders ownership of common units in RMCO as a percentage			41.67%	60.11%
Class A common stock
Significant Accounting Policies [Line Items]
Exercise of stock options, Shares			624,443
Restricted stock, vested			14,866
Issuance of Class A common stock, equity-based compensation plans, shares			2,001
Secondary Offering | RIHI
Significant Accounting Policies [Line Items]
Portion of liability under tax receivable agreements recorded during current period			$ 33,018,000