Segment Information - Reconciliation of Adjusted EBITDA to Consolidated Balances (Details) - USD ($) $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 10,969	$ 15,193	$ 16,058	$ 9,130	$ 7,617	$ 14,055	$ 14,509	$ 7,798	$ 4,976		$ 51,350	$ 43,979	$ 28,252
Depreciation and amortization											15,124	15,316	15,166
Interest expense											10,413	9,295	14,647
Interest income											(178)	(313)	(321)
Provision for income taxes	$ 3,148	$ 3,277	$ 3,457	$ 2,148	$ 1,818	$ 3,116	$ 3,129	$ 1,885		$ 1,071	12,030	9,948	2,844
EBITDA											88,739	78,225	60,588
(Gain) loss on sale or disposition of assets and sublease											(3,650)	(340)	971
Loss on early extinguishment of debt											94	178	1,798
Non-cash straight-line rent expense											889	812	1,183
Equity-based compensation expense incurred prior to or in conjunction with the IPO													2,748
Chairman executive compensation													2,261
Public offering related expenses											1,097		6,995
Severance related expenses											1,482	4,617
Acquisition related expenses											2,750	313	495
Adjusted EBITDA											91,401	83,805	77,039
HBN
Acquisition related expenses											2,729
Real Estate Franchise Services
Net income											47,044	43,664	26,792
Depreciation and amortization											14,827	15,032	14,791
Interest expense											10,371	9,266	14,641
Interest income											(178)	(313)	(321)
Provision for income taxes											11,181	9,894	2,882
EBITDA											83,245	77,543	58,785
(Gain) loss on sale or disposition of assets and sublease											(342)	(469)	1,110
Loss on early extinguishment of debt											94	178	1,798
Non-cash straight-line rent expense											954	1,045	1,298
Equity-based compensation expense incurred prior to or in conjunction with the IPO													2,748
Chairman executive compensation													2,261
Public offering related expenses											1,097		6,995
Severance related expenses											1,482	4,617
Acquisition related expenses											2,750	313	495
Adjusted EBITDA											89,280	83,227	75,490
Brokerages
Net income											4,306	315	1,460
Depreciation and amortization											297	284	375
Interest expense											42	29	6
Provision for income taxes											849	54	(38)
EBITDA											5,494	682	1,803
(Gain) loss on sale or disposition of assets and sublease											(3,308)	129	(139)
Non-cash straight-line rent expense											(65)	(233)	(115)
Adjusted EBITDA											$ 2,121	$ 578	$ 1,549