Non-controlling Interest - Narrative (Details) - USD ($)		1 Months Ended	12 Months Ended
	Jan. 20, 2017	Feb. 28, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 07, 2013
Significant Accounting Policies [Line Items]
Exercise of stock options, Shares			28,057
Percentage of remaining cash savings from which the entity expects to benefit			15.00%
Current portion of payable pursuant to tax receivable agreements			$ 13,235,000	$ 8,478,000
Amounts paid pursuant to Tax Receivable Agreements (TRAs)			1,344,000	$ 0	$ 986,000
Subsequent Event
Significant Accounting Policies [Line Items]
Amounts paid pursuant to Tax Receivable Agreements (TRAs)	$ 1,931,000
Quarterly distribution | Subsequent Event
Significant Accounting Policies [Line Items]
Distributions declared to non-controlling unitholders		$ 2,261,000
RIHI
Significant Accounting Policies [Line Items]
Liability representing the payments due pursuant to tax receivable agreements			98,809,000
Current portion of payable pursuant to tax receivable agreements			13,235,000
RIHI | 2014 Tax Returns
Significant Accounting Policies [Line Items]
Current portion of payable pursuant to tax receivable agreements			2,602,000
RIHI | 2015 Tax Returns
Significant Accounting Policies [Line Items]
Current portion of payable pursuant to tax receivable agreements			$ 4,605,000
RMCO, LLC
Significant Accounting Policies [Line Items]
Parent economic interest in RMCO (as a percent)			58.43%	58.33%		39.56%
Weighted average ownership percentage			58.40%	42.33%	39.57%
Non-controlling unitholders ownership of common units in RMCO as a percentage			41.57%	41.67%
RIHI and Western Presidio V, L.P.
Significant Accounting Policies [Line Items]
Percentage of cash savings in federal, state and local taxes to be paid in cash under tax receivable agreements			85.00%
Restricted Stock Units exchanged for Class A Common Stock [Member]
Significant Accounting Policies [Line Items]
Vesting of restricted stock units			40,140