Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Expected Amortization Expense for Acquired Intangible Assets

Expected amortization expense for acquired intangible assets for each of the following periods is as follows:

	Amortization
	(In thousands)
Expected for fiscal year 2019	$	9,571
Expected for fiscal year 2020		7,726
Expected for fiscal year 2021		5,277
Expected for fiscal year 2022		3,451
Expected for fiscal year 2023		3,146
Thereafter		2,691
	$	31,862

Allocation of Other Acquired Intangible Assets and Related Accumulated Amortization

The allocation of the other acquired intangible assets and the related accumulated amortization as of March 31, 2018 and 2017 is as follows:

			As of March 31, 2018							As of March 31, 2017
	Weighted Average Useful Life		Total		Accumulated Amortization			Net Book Value		Total		Accumulated Amortization			Net Book Value
	(In years)		(In thousands)
Technology		6	$	90,652	$	(69,387	)	$	21,265	$	87,592	$	(62,749	)	$	24,843
Contracts and customer relationships		7		103,808		(94,584	)		9,224		103,034		(89,083	)		13,951
Satellite co-location rights		9		8,600		(7,668	)		932		8,600		(6,743	)		1,857
Trade name		3		5,940		(5,940	)		—		5,940		(5,940	)		—
Other		6		10,137		(9,696	)		441		9,925		(8,899	)		1,026
Total other acquired intangible assets			$	219,137	$	(187,275	)	$	31,862	$	215,091	$	(173,414	)	$	41,677