Goodwill and Acquired Intangible Assets - Allocation of Other Acquired Intangible Assets and Related Accumulated Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	9 years
Other acquired intangible assets, gross	$ 382,585	$ 151,549
Other acquired intangible assets, accumulated amortization	(146,542)	(141,981)
Other acquired intangible assets, net	$ 236,043	9,568
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	7 years
Other acquired intangible assets, gross	$ 154,624	78,185
Other acquired intangible assets, accumulated amortization	(71,582)	(71,549)
Other acquired intangible assets, net	$ 83,042	6,636
Contracts and Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	10 years
Other acquired intangible assets, gross	$ 164,635	55,161
Other acquired intangible assets, accumulated amortization	(53,250)	(52,229)
Other acquired intangible assets, net	$ 111,385	2,932
Satellite Co-Location Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	9 years
Other acquired intangible assets, gross	$ 8,600	8,600
Other acquired intangible assets, accumulated amortization	$ (8,600)	(8,600)
Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	7 years
Other acquired intangible assets, gross	$ 32,463	5,940
Other acquired intangible assets, accumulated amortization	(9,097)	(5,940)
Other acquired intangible assets, net	$ 23,366
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	11 years
Other acquired intangible assets, gross	$ 22,263	3,663
Other acquired intangible assets, accumulated amortization	(4,013)	$ (3,663)
Other acquired intangible assets, net	$ 18,250