FAIR VALUE (Narrative) (Details) - US Government Obligations and Authorities, Corporate and International Securities [Member] - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities, fair value	$ 3.9	$ 4.0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities, fair value	$ 1.2	$ 1.3