PREFERRED STOCK - Repurchases of Depository Shares of Mandatory Convertible Preferred Stock (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Feb. 28, 2018	Mar. 31, 2018
Equity [Abstract]
Number of Depository Shares Repurchased	151,900	151,900
Amount Paid for Repurchases	$ 7.4	$ 7.4
Average Price Paid per Share	$ 49.05	$ 49.05