INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit) from the Act	$ 0.7
Remeasurement of deferred tax assets and liabilities	0.7
Increase (decrease) in valuation allowance		$ 1.9	$ 0.5
Net operating loss carryforwards	24.8	24.8
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 71.2	$ 71.2
Income taxes receivable			$ 21.8	$ 21.8