INCOME TAXES (Reconciliation of Income Tax Provision) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Dec. 31, 2017	Sep. 30, 2018	Sep. 30, 2017
INCOME TAXES
Expected expense at the statutory rate		$ 8.9	$ 10.0
Non-deductible stock-based compensation		1.1	1.5
State income taxes benefit, net of federal benefit		1.5	0.6
Transaction costs not deductible for tax purposes		0.3	0.1
Change in tax rates		(0.1)
Foreign tax rate differential		0.2	(2.2)
U.S. Tax Reform	$ 0.8	7.6
Foreign entities with valuation allowance		(0.3)	(5.7)
Other, net		1.3	1.1
Provision for income taxes		$ 20.5	$ 5.4