COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	1 Months Ended
	Jul. 31, 2016	Mar. 28, 2020	Mar. 31, 2019	Mar. 30, 2019
Loss Contingencies [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months				$ 18,882
Operating Leases, Future Minimum Payments Receivable, Current				(5,238)
Operating Leases, Future Minimum Payments Due, Next Twelve Months, Net				13,644
Operating Lease, Weighted Average Remaining Lease Term		3 years
Operating Lease, Weighted Average Discount Rate, Percent		4.70%
Unconditional purchase obligations		$ 344,500
Operating Leases, Future Minimum Payments, Due in Two Years				17,883
Operating Leases, Future Minimum Payments Receivable, in Two Years				(5,481)
Operating Leases, Future Minimum Payments, Due in Two Years, Net				12,402
Operating Leases, Future Minimum Payments, Due in Three Years				15,239
Operating Leases, Future Minimum Payments Receivable, in Three Years				(5,645)
Operating Leases, Future Minimum Payments, Due in Three Years, Net				9,594
Operating Leases, Future Minimum Payments, Due in Four Years				5,800
Operating Leases, Future Minimum Payments Receivable, in Four Years				(1,160)
Operating Leases, Future Minimum Payments, Due in Four Years, Net				4,640
Operating Leases, Future Minimum Payments, Due in Five Years				1,281
Operating Leases, Future Minimum Payments Receivable, in Five Years				0
Operating Leases, Future Minimum Payments, Due in Five Years, Net				1,281
Operating Leases, Future Minimum Payments, Due Thereafter				601
Operating Leases, Future Minimum Payments Receivable, Thereafter				0
Operating Leases, Future Minimum Payments, Due Thereafter, Net				601
Operating Leases, Future Minimum Payments Due				59,686
Operating Leases, Future Minimum Payments Receivable				(17,524)
Operating Leases, Future Minimum Payments Due, Net				$ 42,162
GN Netcom, Inc. vs. Plantronics, Inc. | Punitive Sanctions
Loss Contingencies [Line Items]
Punitive sanctions awarded against Plantronics, Inc.	$ 4,900
Liability [Member]
Loss Contingencies [Line Items]
2021		24,845
2022		21,468
2023		9,256
2024		4,020
2025		2,356
Thereafter		1,651
Total lease payments		63,596
Less: Imputed interest		5,935
Present value of lease liabilities		$ 57,661	$ 68,500