Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Accounts receivable, net:
Accounts receivable, Billed	$ 289,580	$ 263,383
Accounts receivable, Unbilled	95,799	103,045
Allowance for doubtful accounts	(13,261)	(7,159)
Accounts receivable, net	372,118	359,269
Inventories:
Raw materials	106,047	92,650
Work in process	65,107	64,371
Finished goods	190,853	184,869
Inventories	362,007	341,890
Prepaid expenses and other current assets:
Prepaid expenses	104,039	107,885
Other	68,653	39,969
Prepaid expenses and other current assets	172,692	147,854
Property, equipment and satellites, net:
Property, equipment and satellites, gross	6,004,899	5,801,692
Less: accumulated depreciation and amortization	(2,140,400)	(2,059,780)
Property and equipment, net	3,864,499	3,741,912
Other acquired intangible assets, net:
Other acquired intangible assets, gross	374,443	382,585
Less: accumulated amortization	(152,256)	(146,542)
Other acquired intangible assets, net	222,187	236,043
Other assets:
Deferred income taxes	314,970	304,642
Capitalized software costs, net	221,126	221,647
Patents, orbital slots and other licenses, net	65,525	62,200
Other	133,983	117,141
Other assets	735,604	705,630
Accrued and other liabilities:
Collections in excess of revenues and deferred revenues	154,828	148,906
Accrued employee compensation	34,119	113,554
Accrued vacation	50,045	51,675
Warranty reserve, current portion	4,963	5,043
Operating lease liabilities	$ 52,629	$ 52,122
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued and other liabilities	Accrued and other liabilities
Other	$ 144,557	$ 145,122
Accrued And Other Liabilities Current	441,141	516,422
Accrued and other liabilities	441,141	516,422
Other liabilities:
Deferred revenues, long-term portion	85,216	90,151
Warranty reserve, long-term portion	5,533	5,675
Satellite performance incentive obligations, long-term portion	17,700	18,651
Deferred income taxes, long-term	15,775	16,869
Other	24,950	26,105
Other liabilities	149,174	157,451
Technology [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	150,063	154,624
Contracts and Customer Relationships [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	161,888	164,635
Satellite Co-Location Rights [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	8,600	8,600
Trade Name [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	32,138	32,463
Other [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	21,754	22,263
Satellites [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	1,054,551	1,059,182
Satellites under Construction [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	1,917,973	1,808,474
Equipment and Software [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	1,796,855	1,750,855
CPE Leased Equipment [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	385,428	395,539
Satellite Ka-band Capacity Obtained under Finance Leases [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	176,348	173,480
Furniture and Fixtures [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	59,196	58,602
Leasehold Improvements [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	151,207	151,508
Buildings [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	12,340	12,440
Land [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	3,854	3,944
Construction in Progress [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	$ 447,147	$ 387,668