LEASES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 37,300	$ 37,300	$ 32,000
Operating Lease, Expense	$ 2,200	$ 4,200
Operating Lease, Weighted Average Remaining Lease Term	7 years	7 years
Operating Lease, Weighted Average Discount Rate, Percent	3.62%	3.62%
Operating Lease, Payments		$ (4,400)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		9,100
Operating Leases, Future Minimum Payments Due under ASC 840				$ 6,300
Operating Leases, Future Minimum Payments, Due in Two Years				5,100
Operating Leases, Future Minimum Payments, Due in Three Years				4,500
Operating Leases, Future Minimum Payments, Due in Four Years				4,300
Operating Leases, Future Minimum Payments, Due in Five Years				4,200
Operating Leases, Future Minimum Payments, Due Thereafter				3,800
Operating Leases, Future Minimum Payments Due				$ 28,200
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 3,700	3,700
Lessee, Operating Lease, Liability, Payments, Due Year Two	7,500	7,500
Lessee, Operating Lease, Liability, Payments, Due Year Three	7,100	7,100
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,800	6,800
Lessee, Operating Lease, Liability, Payments, Due Year Five	5,700	5,700
Lessee, Operating Lease, Liability, Payments, Due after Year Five	11,600	11,600
Lessee, Operating Lease, Liability, Payments, Due	42,400	42,400
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(5,200)	(5,200)
Operating Lease, Liability	37,200	37,200	$ 32,000
Operating Lease, Liability, Current	6,200	6,200
Operating Lease, Liability, Noncurrent	$ 31,000	$ 31,000
Lessee, Operating Lease, Option to Extend		10 years
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	15 years	15 years