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Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Mar. 31, 2020
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable, Billed | $ 172,559 | $ 260,431
Accounts receivable, Unbilled | 70,785 | 75,661
Allowance for doubtful accounts | (4,692) | (5,394)
Accounts receivable, net | 238,652 | 330,698
Inventories: |  |
Raw materials | 98,338 | 83,353
Work in process | 71,875 | 59,429
Finished goods | 166,459 | 151,634
Inventories | 336,672 | 294,416
Prepaid expenses and other current assets: |  |
Prepaid expenses | 94,405 | 84,872
Other | 25,555 | 31,409
Prepaid expenses and other current assets | 119,960 | 116,281
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 4,834,919 | 4,101,634
Less: accumulated depreciation and amortization | (1,784,436) | (1,514,899)
Property and equipment, net | 3,050,483 | 2,586,735
Other assets: |  |
Investment in unconsolidated affiliate | 176,938 | 160,204
Deferred income taxes | 273,288 | 276,331
Capitalized software costs, net | 237,100 | 242,741
Patents, orbital slots and other licenses, net | 52,889 | 39,135
Other | 95,212 | 88,941
Other assets | 835,427 | 807,352
Accrued and other liabilities: |  |
Collections in excess of revenues and deferred revenues | 216,594 | 123,019
Accrued employee compensation | 87,153 | 72,654
Accrued vacation | 59,509 | 48,963
Warranty reserve, current portion | 6,693 | 6,233
Operating lease liabilities | $ 48,896 | $ 42,146
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Accrued and other liabilities | Accrued and other liabilities
Other | $ 113,986 | $ 98,175
Accrued and other liabilities | 532,831 | 391,190
Other liabilities: |  |
Deferred revenues, long-term portion | 84,654 | 80,802
Warranty reserve, long-term portion | 5,193 | 5,410
Satellite performance incentive obligations, long-term portion | 22,191 | 24,349
Other | 25,312 | 10,373
Other liabilities | 137,350 | 120,934
Satellites [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 969,952 | 969,952
Satellites under Construction [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 1,338,408 | 906,720
Equipment and Software [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 1,505,697 | 1,229,926
CPE Leased Equipment [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 409,942 | 399,343
Less: accumulated depreciation and amortization | (193,700) | (165,700)
Satellite Ka-band Capacity Obtained under Finance Leases [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 173,467 | 171,801
Furniture and Fixtures [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 57,433 | 54,688
Leasehold Improvements [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 149,324 | 137,287
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 | $ 219,482 | $ 220,703

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