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Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Apr. 01, 2019 | Mar. 31, 2019
--- | --- | --- | ---
Accounts receivable, net: |  |  |
Accounts receivable, Billed | $ 220,068 |  | $ 218,276
Accounts receivable, Unbilled | 98,517 |  | 83,743
Allowance for doubtful accounts | (2,146) |  | (1,712)
Accounts receivable, net | 316,439 |  | 300,307
Inventories: |  |  |
Raw materials | 81,483 |  | 77,834
Work in process | 61,125 |  | 52,084
Finished goods | 140,692 |  | 104,600
Inventories | 283,300 |  | 234,518
Prepaid expenses and other current assets: |  |  |
Prepaid expenses | 84,297 |  | 72,369
Other | 18,427 |  | 18,277
Prepaid expenses and other current assets | 102,724 | $ 90,179 | 90,646
Property, equipment and satellites, net |  |  |
Property, equipment and satellites, gross | 3,974,057 |  | 3,419,456
Less: accumulated depreciation and amortization | (1,461,044) |  | (1,294,166)
Property and equipment, net | 2,513,013 |  | 2,125,290
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 217,651 |  | 217,784
Less: accumulated amortization | (201,380) |  | (195,483)
Other acquired intangible assets, net | 16,271 |  | 22,301
Other assets: |  |  |
Investment in unconsolidated affiliate | 158,358 |  | 160,711
Deferred income taxes | 275,657 |  | 258,834
Capitalized software costs, net | 241,782 |  | 244,368
Patents, orbital slots and other licenses, net | 39,056 |  | 23,059
Other | 85,052 |  | 71,833
Other assets | 799,905 |  | 758,805
Accrued and other liabilities: |  |  |
Collections in excess of revenues and deferred revenues | 120,275 |  | 125,540
Accrued employee compensation | 59,395 |  | 56,454
Accrued vacation | 45,030 |  | 43,077
Warranty reserve, current portion | 5,845 |  | 5,877
Operating lease liabilities | 42,829 |  |
Other | 82,542 |  | 77,320
Accrued and other liabilities | 355,916 | 346,674 | 308,268
Other liabilities: |  |  |
Deferred revenues, long-term portion | 83,423 |  | 71,230
Deferred rent, long-term portion |  |  | 16,810
Warranty reserve, long-term portion | 4,226 |  | 1,707
Satellite performance incentive obligations, long-term portion | 24,642 |  | 25,324
Other | 5,829 |  | 5,755
Other liabilities | 118,120 | $ 104,115 | 120,826
Technology [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 89,882 |  | 89,972
Contracts and Customer Relationships [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 103,251 |  | 103,283
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 | 5,940 |  | 5,940
Other [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 9,978 |  | 9,989
Satellites [Member] |  |  |
Property, equipment and satellites, net |  |  |
Property, equipment and satellites, gross | 978,113 |  | 978,118
Satellites under Construction [Member] |  |  |
Property, equipment and satellites, net |  |  |
Property, equipment and satellites, gross | 839,420 |  | 590,000
Equipment and Software [Member] |  |  |
Property, equipment and satellites, net |  |  |
Property, equipment and satellites, gross | 1,173,309 |  | 1,027,293
CPE Leased Equipment [Member] |  |  |
Property, equipment and satellites, net |  |  |
Property, equipment and satellites, gross | 401,741 |  | 373,357
Less: accumulated depreciation and amortization | (160,400) |  | (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 | 53,002 |  | 46,678
Leasehold Improvements [Member] |  |  |
Property, equipment and satellites, net |  |  |
Property, equipment and satellites, gross | 132,107 |  | 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 | $ 213,350 |  | $ 167,178

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