ACQUISITION, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jul. 02, 2018	Mar. 31, 2018
Accounts payable
Goodwill	$ 1,334,534		$ 15,498
Polycom [Member]
ASSETS
Cash and cash equivalents		$ 80,139
Trade receivables, net		168,595
Inventories		107,820
Prepaid expenses and other current assets		32,551
Property and equipment, net		80,310
Intangible assets		985,400
Other assets		28,572
Total assets acquired		1,483,387
Accounts payable
Accounts payable		81,854
Accrued payroll and related liabilities		45,317
Accrued expenses		120,167
Income tax payable		30,153
Deferred revenue		114,264
Deferred income taxes		150,112
Other liabilities		35,912
Total liabilities assumed		577,779
Total identifiable net assets acquired		905,608
Goodwill		1,319,036
Total Purchase Price		$ 2,224,644