DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - IPO (Details) - IPO $ / shares in Units, $ in Millions	1 Months Ended
	Nov. 30, 2015 USD ($) $ / shares shares
Class of Stock [Line Items]
Proceeds from issuance initial public offering	$ 245.7
Payments of underwriting discounts and commissions	14.7
Payments of other offering expenses	$ 6.9
Class A
Class of Stock [Line Items]
Shares issued (in shares) | shares	29,700,000
Shares issued, price per share (in USD per share) | $ / shares	$ 9.00
Shares sold by stockholder (in shares) | shares	1,350,000