COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Operating Leases, Future Minimum Payments Due [Abstract]
2017	$ 2,416,000
2018	1,522,000
2019	1,279,000
2020	1,203,000
2021	952,000
Thereafter	1,855,000
Total minimum future rental payments	9,227,000
Total rent expense for operating leases	2,900,000	$ 3,400,000	$ 4,300,000
Unconditional purchase obligations	150,900,000
GN Netcom, Inc. vs. Plantronics, Inc. | Spoliation of Evidence | Minimum
Loss Contingencies [Line Items]
Estimate of possible loss	$ 0