Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Apr. 01, 2019	Mar. 31, 2019
Accounts receivable, net:
Accounts receivable, Billed	$ 260,431		$ 218,276
Accounts receivable, Unbilled	75,661		83,743
Allowance for doubtful accounts	(5,394)		(1,712)
Accounts receivable, net	330,698		300,307
Inventories:
Raw materials	83,353		77,834
Work in process	59,429		52,084
Finished goods	151,634		104,600
Inventories	294,416		234,518
Prepaid expenses and other current assets:
Prepaid expenses	84,872		72,369
Other	31,409		18,277
Prepaid expenses and other current assets	116,281	$ 90,179	90,646
Property, equipment and satellites, net:
Property, equipment and satellites, gross	4,101,634		3,419,456
Less: accumulated depreciation and amortization	(1,514,899)		(1,294,166)
Property and equipment, net	2,586,735		2,125,290
Other assets:
Investment in unconsolidated affiliate	160,204		160,711
Deferred income taxes	276,331		258,834
Capitalized software costs, net	242,741		244,368
Patents, orbital slots and other licenses, net	39,135		23,059
Other	88,941		71,833
Other assets	807,352		758,805
Accrued and other liabilities:
Collections in excess of revenues and deferred revenues	123,019		125,540
Accrued employee compensation	72,654		56,454
Accrued vacation	48,963		43,077
Warranty reserve, current portion	6,233		$ 5,877
Operating lease liabilities	$ 42,146
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	vsat:AccruedAndOtherLiabilitiesCurrent		vsat:AccruedAndOtherLiabilitiesCurrent
Other	$ 98,175		$ 77,320
Accrued and other liabilities	391,190	346,674	308,268
Other liabilities:
Deferred revenues, long-term portion	80,802		71,230
Deferred rent, long-term portion			16,810
Warranty reserve, long-term portion	5,410		1,707
Satellite performance incentive obligations, long-term portion	24,349		25,324
Other	10,373		5,755
Other liabilities	120,934	$ 104,115	120,826
Satellites [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	969,952		978,118
Satellites under Construction [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	906,720		590,000
Equipment and Software [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	1,229,926		1,027,293
CPE Leased Equipment [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	399,343		373,357
Less: accumulated depreciation and amortization	(165,700)		(142,600)
Satellite Ka-band Capacity Obtained under Finance Leases [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	171,801		99,090
Furniture and Fixtures [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	54,688		46,678
Leasehold Improvements [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	137,287		126,528
Building [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	8,923		8,923
Land [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	2,291		2,291
Construction in Progress [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	$ 220,703		$ 167,178