COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	1 Months Ended
	Nov. 30, 2017	Jul. 31, 2016	Dec. 31, 2019	Apr. 01, 2019
Loss Contingencies [Line Items]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year			$ 6,153
Lessee, Operating Lease, Liability, Payments, Due Year Two			23,233
Lessee, Operating Lease, Liability, Payments, Due Year Three			19,961
Lessee, Operating Lease, Liability, Payments, Due Year Four			7,613
Lessee, Operating Lease, Liability, Payments, Due Year Five			2,724
Lessee, Operating Lease, Liability, Payments, Due after Year Five			1,102
Lessee, Operating Lease, Liability, Payments, Due			60,786
Lessee, Operating Lease, Liability, Undiscounted Excess Amount			(3,518)
Operating lease, liability			$ 57,268	$ 68,500
Operating Lease, Weighted Average Remaining Lease Term			2 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent			4.70%
Unconditional purchase obligations			$ 308,500
GN Netcom, Inc. vs. Plantronics, Inc. [Member] | Punitive Sanctions [Member]
Loss Contingencies [Line Items]
Sanctions order issued for allegations of spoliation of evidence		$ 4,900
Amount awarded from other party	$ 200