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Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Mar. 31, 2021
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable, Billed | $ 262,591 | $ 172,559
Accounts receivable, Unbilled | 105,366 | 70,785
Allowance for doubtful accounts | (3,463) | (4,692)
Accounts receivable, net | 364,494 | 238,652
Inventories: |  |
Raw materials | 94,937 | 98,338
Work in process | 77,400 | 71,875
Finished goods | 177,350 | 166,459
Inventories | 349,687 | 336,672
Prepaid expenses and other current assets: |  |
Prepaid expenses | 101,189 | 94,405
Other | 41,970 | 25,555
Prepaid expenses and other current assets | 143,159 | 119,960
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 5,200,686 | 4,834,919
Less: accumulated depreciation and amortization | (1,811,243) | (1,784,436)
Property and equipment, net | 3,389,443 | 3,050,483
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 391,180 | 151,549
Less: accumulated amortization | (129,239) | (141,981)
Other acquired intangible assets, net | 261,941 | 9,568
Other assets: |  |
Investment in unconsolidated affiliate |  | 176,938
Deferred income taxes | 286,556 | 273,288
Capitalized software costs, net | 232,493 | 237,100
Patents, orbital slots and other licenses, net | 59,307 | 52,889
Other | 105,372 | 95,212
Other assets | 683,728 | 835,427
Accrued and other liabilities: |  |
Collections in excess of revenues and deferred revenues | 201,706 | 216,594
Accrued employee compensation | 42,075 | 87,153
Accrued vacation | 58,606 | 59,509
Warranty reserve, current portion | 7,039 | 6,693
Operating lease liabilities | $ 50,955 | $ 48,896
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Accrued and other liabilities | Accrued and other liabilities
Other | $ 149,648 | $ 113,986
Accrued and other liabilities | 510,029 | 532,831
Other liabilities: |  |
Deferred revenues, long-term portion | 90,352 | 84,654
Warranty reserve, long-term portion | 5,491 | 5,193
Satellite performance incentive obligations, long-term portion | 21,347 | 22,191
Other | 47,837 | 25,312
Other liabilities | 165,027 | 137,350
Technology [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 154,246 | 78,185
Contracts and Customer Relationships [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 177,224 | 55,161
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 | 32,318 | 5,940
Other [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 18,792 | 3,663
Satellites [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 1,065,559 | 969,952
Satellites under Construction [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 1,497,175 | 1,338,408
Equipment and Software [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 1,587,674 | 1,505,697
CPE Leased Equipment [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 409,849 | 409,942
Less: accumulated depreciation and amortization | (198,900) | (193,700)
Satellite Ka-band Capacity Obtained under Finance Leases [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 173,480 | 173,467
Furniture and Fixtures [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 59,719 | 57,433
Leasehold Improvements [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 154,006 | 149,324
Building [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 12,512 | 8,923
Land [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 4,008 | 2,291
Construction in Progress [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | $ 236,704 | $ 219,482

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