INVESTMENTS (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) security	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) security
Investments [Abstract]
Unrealized gains and losses for equity securities (Less Than) | $	$ 2.3	$ 0.1
Debt and equity securities held in an unrealized loss position | security	592		1,222
Debt securities and equity securities held in an unrealized loss position 12 months or more | security	475		371
Fair value of investments deposited with governmental authorities required by law | $	$ 10.6		$ 10.3