ORGANIZATION AND BASIS OF PRESENTATION (Details) - Feb. 18, 2015 - Common Class A - USD ($) $ / shares in Units, $ in Millions	Total
ORGANIZATION AND BASIS OF PRESENTATION
Shares issued	25,364,803
IPO
ORGANIZATION AND BASIS OF PRESENTATION
Shares issued	22,222,222
Share price (in dollars per share)	$ 27.00
Proceeds from issuance of initial public offering shares	$ 639.1
Over-Allotment Option
ORGANIZATION AND BASIS OF PRESENTATION
Shares issued	3,142,581