BUSINESS CHANGES AND DEVELOPMENTS (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2014	Mar. 31, 2014	Mar. 31, 2013
Reorganization and initial public offering
Distributions	$ 215,000
Pro forma net income attributable to Class A common shareholders		22,092	711
Pro forma net income attributable to Class A common shareholders
Income before income taxes		22,734	746
Provision for income taxes		(642)	(35)
Pro forma net income attributable to Class A common shareholders		22,092	711
Class A common stock
Reorganization and initial public offering
Number of shares of common stock to be issued upon exchange of a partnership unit	1
Class A common stock | Pro Forma
Reorganization and initial public offering
Pro forma net income attributable to Class A common shareholders		2,248
Weighted average shares of Class A common stock outstanding - basic and diluted (in shares)		7,699,851
Net income available to holders of Class A common stock per share (in dollars per share)		$ 0.29
Pro forma net income attributable to Class A common shareholders
Income before income taxes		22,734
Provision for income taxes		(2,035)
Pro forma net income		20,699
Pro forma net income attributable to noncontrolling interests		18,451
Pro forma net income attributable to Class A common shareholders		$ 2,248
Effective tax rate (as a percent)		40.00%
Basic and diluted weighted average Class A common stock outstanding
Class A common stock outstanding upon completion of the reorganization		7,699,851
Weighted average shares of Class A common stock outstanding upon completion of the reorganization		7,699,851
Fully diluted shares of common stock outstanding if all Class A partnership units were to be exchanged for common stock immediately following the reorganization		46,722,753
Class B common stock
Reorganization and initial public offering
Ratio of subscription price to the initial public offering price of shares of common stock		0.00055
Dividends payable ratio to outstanding shares of publicly traded common stock		0.00055
Number of votes entitled to holder for each share of common stock held upon satisfaction of Class B Condition	10
Number of votes entitled to holder for each share of common stock held upon failure of Class B Condition	1
Class B common stock | Maximum
Reorganization and initial public offering
Aggregate number of shares of Class B common stock that may be converted into Class A common stock	20,000
Group LP
Reorganization and initial public offering
Number of principal classes of units	1
Post reorganization partnership units	46,722,753
Number of units held by noncontrolling interest holders	39,022,902
Number of units converted into Class A Common stock of reporting entity	7,699,851
Pro forma net income attributable to Class A common shareholders
Percentage of outstanding partnership ownership interest converted	16.48%
Noncontrolling interests (as a percent)	83.52%
Old Holdings
Reorganization and initial public offering
Partnership units converted in reorganization	1,101,541