ACQUISITION, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jul. 02, 2018	Mar. 31, 2018
Accounts payable
Goodwill	$ 1,272,619		$ 15,498
Polycom [Member]
ASSETS
Cash and cash equivalents		$ 80,139
Trade receivables, net		166,067
Inventories		107,842
Prepaid expenses and other current assets		66,491
Property and equipment, net		80,310
Intangible assets		985,400
Other assets		27,237
Total assets acquired		1,513,486
Accounts payable
Accounts payable		81,395
Accrued payroll and related liabilities		44,538
Accrued expenses		136,823
Income tax payable		32,513
Deferred revenue		115,061
Deferred income taxes		104,242
Other liabilities		39,390
Total liabilities assumed		553,962
Total identifiable net assets acquired		959,524
Goodwill		1,257,121
Total Purchase Price		$ 2,216,645