GOODWILL & INTANGIBLE ASSETS (Tables)

12 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the fiscal years ended March 31, 2020 and 2019 are as follows (in thousands):

Balance at March 31, 2018	$	1,712,764
Divestiture of the HNT tools business	(4,414)
Foreign currency translation impact	7,135
Balance at March 31, 2019	$	1,715,485
Goodwill attributed to the Eastwind acquisition	1,003
Goodwill attributed to the Gigavation acquisition	3,816
Foreign currency translation impact	5,376
Balance at March 31, 2020	$	1,725,680

Schedule of Intangible Assets

Intangible assets include the indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2020 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	249,675	$	(191,876)	$	57,799
Customer relationships	767,366		(275,361)		492,005
Distributor relationships and technology licenses	6,785		(6,321)		464
Definite-lived trademark and trade name	39,059		(26,246)		12,813
Core technology	7,192		(7,074)		118
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,223		(16,223)		—
Capitalized software	3,317		(3,202)		115
Other	1,208		(943)		265
	$	1,091,953	$	(528,374)	$	563,579

Intangible assets include the indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2019 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	242,259	$	(168,289)	$	73,970
Customer relationships	772,969		(218,043)		554,926
Distributor relationships and technology licenses	6,882		(5,237)		1,645
Definite-lived trademark and trade name	39,304		(20,586)		18,718
Core technology	7,192		(6,845)		347
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,397		(16,397)		—
Capitalized software	3,317		(2,690)		627
Other	1,208		(923)		285
	$	1,090,656	$	(440,138)	$	650,518

Summary of Amortization Expense

The following table provides a summary of amortization expense during the fiscal years ended March 31, 2020, 2019, and 2018 (in thousands).

	Years Ended March 31,
	2020		2019		2018
Amortization of intangible assets included as:
Product revenue	$	—	$	—	$	9
Cost of product revenue	26,664		34,039		40,286
Operating expense	64,525		74,325		76,661
	$	91,189	$	108,364	$	116,956

Schedule of Expected Future Amortization Expense

The following is the expected future amortization expense at March 31, 2020 for the fiscal years ended March 31 (in thousands):

2021	$	80,028
2022	69,657
2023	61,976
2024	53,910
2025	47,665
Thereafter	250,343
Total	$	563,579