GOODWILL AND PURCHASED INTANGIBLE ASSETS (Tables)

12 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Details of acquired intangible assets

The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:

(in thousands, except for remaining life)	Fair Value		Weighted-Average Amortization Period
Existing technology	$	538,600	4.95
Customer relationships	245,100		5.46
Trade name/Trademarks	115,600		9.00
Backlog	28,100		0.25
Total amortizable intangible assets acquired	927,400		5.45
In-process research and development	58,000
Total acquired intangible assets	$	985,400

The carrying value of other intangible assets, excluding fully amortized intangible assets as of March 31, 2019, is set forth in the following table:

(in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life
Amortizing Assets
Existing technology	$	566,881	$	86,301	$	480,580	4.2 years
Customer relationships	245,481		36,245		209,236		4.8 years
Trade name	115,600		9,633		105,967		8.3 years
Non-amortizing assets
In-process R&D	29,892		—		29,892		N/A
Total intangible assets	$	957,854	$	132,179	$	825,675	4.9 years

Details of acquired intangible assets

The following table shows the fair value of the separately identifiable intangible assets at the time of acquisition and the period over which each intangible asset will be amortized:

(in thousands, except for remaining life)	Fair Value		Weighted-Average Amortization Period
Existing technology	$	538,600	4.95
Customer relationships	245,100		5.46
Trade name/Trademarks	115,600		9.00
Backlog	28,100		0.25
Total amortizable intangible assets acquired	927,400		5.45
In-process research and development	58,000
Total acquired intangible assets	$	985,400

The carrying value of other intangible assets, excluding fully amortized intangible assets as of March 31, 2019, is set forth in the following table:

(in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life
Amortizing Assets
Existing technology	$	566,881	$	86,301	$	480,580	4.2 years
Customer relationships	245,481		36,245		209,236		4.8 years
Trade name	115,600		9,633		105,967		8.3 years
Non-amortizing assets
In-process R&D	29,892		—		29,892		N/A
Total intangible assets	$	957,854	$	132,179	$	825,675	4.9 years

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

As of March 31, 2019, expected amortization expense for other intangible assets for each of the next five years and thereafter is as follows:

in thousands	Amount
2020	$	179,253
2021	174,411
2022	160,128
2023	156,419
2024	75,012
Thereafter	50,103
	$	795,326