LEASES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Operating Leases, Future Minimum Payments Due under ASC 840		$ 6.3
Operating Leases, Future Minimum Payments, Due in Two Years		5.1
Operating Leases, Future Minimum Payments, Due in Three Years		4.5
Operating Leases, Future Minimum Payments, Due in Four Years		4.3
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 7.6
Operating Lease, Weighted Average Discount Rate, Percent	3.62%
Lessee, Operating Lease, Option to Extend	10 years
Operating Lease, Weighted Average Remaining Lease Term	7 years
Operating Lease, Right-of-Use Asset	$ 34.2	32.0
Operating Lease, Expense	8.5
Operating Leases, Rent Expense		8.2	$ 8.7
Operating Lease, Payments	(8.4)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	9.5
Lessee, Operating Lease, Liability, Payments, Due Year Two	7.2
Lessee, Operating Lease, Liability, Payments, Due Year Three	6.9
Lessee, Operating Lease, Liability, Payments, Due Year Four	5.8
Lessee, Operating Lease, Liability, Payments, Due Year Five	3.1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	8.5
Lessee, Operating Lease, Liability, Payments, Due	39.1
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(4.6)
Operating Lease, Liability	34.5	32.0
Operating Lease, Liability, Current	6.5
Operating Lease, Liability, Noncurrent	$ 28.0
Operating Leases, Future Minimum Payments, Due in Five Years		4.2
Operating Leases, Future Minimum Payments, Due Thereafter		3.8
Operating Leases, Future Minimum Payments Due		$ 28.2
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	15 years