Goodwill and Acquisition-Related Intangibles (Tables)

3 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Gross and net amounts of goodwill and of acquisition-related intangibles

As of June 30, 2018 and March 31, 2018, the gross and net amounts of goodwill and of acquisition-related intangibles for all acquisitions were as follows:

							Weighted-Average
(In thousands)	June 30, 2018			March 31, 2018			Amortization Life
Goodwill	$	162,421		$	162,421
Core technology, gross	82,480			82,480
Less accumulated amortization	(78,885		)	(78,562		)
Core technology, net	3,595			3,918			4.8 years
Other intangibles, gross	46,966			46,966
Less accumulated amortization	(46,798		)	(46,761		)
Other intangibles, net	168			205			2.6 years
Total acquisition-related intangibles, gross	129,446			129,446
Less accumulated amortization	(125,683		)	(125,323		)
Total acquisition-related intangibles, net	$	3,763		$	4,123

Schedule of expected annual amortization expense for acquisition-related intangibles

Based on the carrying value of acquisition-related intangibles recorded as of June 30, 2018, and assuming no subsequent acquisition or impairment of the underlying assets, the annual amortization expense for acquisition-related intangibles is expected to be as follows:

Fiscal	(In thousands)
2019 (remaining nine months)	$	893
2020	1,160
2021	1,137
2022	573
Total	$	3,763