LEASES (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 38,500,000	$ 32,000,000
Operating Lease, Expense	$ 2,000,000
Operating Lease, Weighted Average Remaining Lease Term	7 years
Operating Lease, Weighted Average Discount Rate, Percent	3.66%
Operating Lease, Payments	$ (2,200,000)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	8,700,000
Operating Leases, Future Minimum Payments Due under ASC 840			$ 6,300,000
Operating Leases, Future Minimum Payments, Due in Two Years			5,100,000
Operating Leases, Future Minimum Payments, Due in Three Years			4,500,000
Operating Leases, Future Minimum Payments, Due in Four Years			4,300,000
Operating Leases, Future Minimum Payments, Due in Five Years			4,200,000
Operating Leases, Future Minimum Payments, Due Thereafter			3,800,000
Operating Leases, Future Minimum Payments Due			$ 28,200,000
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	5,700,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	7,400,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	7,000,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,700,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	5,700,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five	11,600,000
Lessee, Operating Lease, Liability, Payments, Due	44,100,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(5,600,000)
Operating Lease, Liability	38,500,000	$ 32,000,000
Operating Lease, Liability, Current	6,200,000
Operating Lease, Liability, Noncurrent	$ 32,300,000
Lessee, Operating Lease, Option to Extend	10 years
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