ACQUISITIONS - Summary of Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jul. 14, 2015	Sep. 30, 2015	Mar. 31, 2015
Estimated fair value of assets acquired and liabilities assumed:
Goodwill		$ 1,702,705	$ 197,445
Communications Business
Business Acquisition [Line Items]
Equity consideration	$ 2,305,611
Less: Delayed close entities	(5,700)
Estimated Purchase Price	2,274,210
Estimated fair value of assets acquired and liabilities assumed:
Cash	27,748
Accounts receivable	135,322
Inventories	80,320
Prepaid expenses and other assets	7,220
Property, plant and equipment	36,539
Deferred income taxes	13,067
Intangible assets	1,080,700
Other assets	897
Accounts payable	(21,819)
Accrued compensation	(27,861)
Accrued other	(13,977)
Deferred revenue	(198,265)
Other long-term liabilities	(3,572)
Accrued retirement benefits	(26,758)
Deferred tax liabilities	(319,612)
Goodwill	1,504,261
Communications Business | Replacement Awards
Business Acquisition [Line Items]
Equity consideration	$ (25,701)