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Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Apr. 01, 2018 | Mar. 31, 2018
--- | --- | --- | ---
Accounts receivable, net: |  |  |
Accounts receivable, Billed | $ 218,276 |  | $ 184,536
Accounts receivable, Unbilled | 83,743 | $ 79,492 | 85,156
Allowance for doubtful accounts | (1,712) |  | (2,027)
Accounts receivable, net | 300,307 |  | 267,665
Inventories: |  |  |
Raw materials | 77,834 |  | 62,252
Work in process | 52,084 |  | 47,465
Finished goods | 104,600 |  | 86,590
Inventories | 234,518 |  | 196,307
Prepaid expenses and other current assets: |  |  |
Prepaid expenses | 72,369 |  | 68,516
Other | 18,277 |  | 8,619
Prepaid expenses and other current assets | 90,646 |  | 77,135
Other assets: |  |  |
Investment in unconsolidated affiliate | 160,711 |  | 163,835
Deferred income taxes | 258,834 |  | 222,274
Capitalized software costs, net | 244,368 |  | 246,792
Patents, orbital slots and other licenses, net | 23,059 |  | 16,100
Other | 71,833 |  | 37,133
Other assets | 758,805 |  | 686,134
Accrued liabilities: |  |  |
Collections in excess of revenues and deferred revenues | 125,540 | 127,355 | 121,439
Accrued employee compensation | 56,454 |  | 46,106
Accrued vacation | 43,077 |  | 39,022
Warranty reserve, current portion | 5,877 |  | 5,357
Other | 77,320 |  | 51,752
Accrued liabilities | 308,268 |  | 263,676
Other liabilities: |  |  |
Deferred revenue, long-term portion | 71,230 | $ 77,831 | 77,831
Deferred rent, long-term portion | 16,810 |  | 13,769
Warranty reserve, long-term portion | 1,707 |  | 1,557
Satellite performance incentive obligation, long-term portion | 25,324 |  | 18,181
Other | 5,755 |  | 9,902
Other liabilities | 120,826 |  | 121,240
Satellites, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 1,667,208 |  | 1,613,935
Less: accumulated depreciation and amortization | (451,545) |  | (373,948)
Property and equipment, net | 1,215,663 |  | 1,239,987
Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 1,752,248 |  | 1,442,398
Less: accumulated depreciation and amortization | (842,621) |  | (719,910)
Property and equipment, net | 909,627 |  | 722,488
Satellites [Member] | Satellites, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 978,118 |  | 1,152,503
Capital Lease of Satellite Capacity - Anik F2 [Member] | Satellites, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 99,090 |  | 99,090
Construction in Progress [Member] | Satellites, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 590,000 |  | 362,342
Construction in Progress [Member] | Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 167,178 |  | 108,192
Equipment and Software [Member] | Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 1,027,293 |  | 864,140
CPE Leased Equipment [Member] | Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 373,357 |  | 298,746
Less: accumulated depreciation and amortization | (142,600) |  | (129,000)
Furniture and Fixtures [Member] | Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 46,678 |  | 35,234
Leasehold Improvements [Member] | Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 126,528 |  | 111,841
Building [Member] | Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | 8,923 |  | 8,923
Land [Member] | Property and Equipment, Net [Member] |  |  |
Property and equipment, net: |  |  |
Property and equipment | $ 2,291 |  | $ 15,322

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