LEASES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Lessee, Lease, Description [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 9,804	$ 11,225
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 8,540
Operating Lease, Weighted Average Discount Rate, Percent	6.00%
Operating Lease, Weighted Average Remaining Lease Term	7 years
Lease, Cost	$ 9,700
Operating Lease, Payments	9,800
Operating Leases, Rent Expense, Net	10,300	9,500	$ 11,800
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two	5,945
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three	5,190
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four	4,309
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five	4,186
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five	14,847
Lessee, Operating Lease, Liability, Payments, Due	43,017
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(8,245)
Operating Lease, Liability	34,772
Operating Lease, Liability, Current	6,645	0
Operating Lease, Liability, Noncurrent	28,127	0
Operating Leases, Future Minimum Payments, Due in Two Years	6,604	9,784
Operating Leases, Future Minimum Payments, Due in Three Years	5,712	6,850
Operating Leases, Future Minimum Payments, Due in Four Years	4,756	5,982
Operating Leases, Future Minimum Payments, Due in Five Years	4,638	4,754
Operating Leases, Future Minimum Payments, Due Thereafter	15,388	20,040
Operating Leases, Future Minimum Payments Due	46,902	58,635
Operating Leases, Income Statement, Sublease Revenue	$ 1,300	1,200	700
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	8 years
Operating Leases on Vacated Facilities [Member]
Lessee, Lease, Description [Line Items]
Effect on Future Cash Flows, Amount	$ 2,900
Facilities-Related [Member]
Lessee, Lease, Description [Line Items]
Restructuring Reserve	$ 0	$ 318	$ 2,479	$ 3,308