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Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Mar. 31, 2016
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable, Billed | $ 126,592 | $ 146,309
Accounts receivable, Unbilled | 129,724 | 141,568
Allowance for doubtful accounts | (1,557) | (1,153)
Accounts receivable, net | 254,759 | 286,724
Inventories: |  |
Raw materials | 53,756 | 46,757
Work in process | 28,113 | 27,200
Finished goods | 76,591 | 71,204
Inventories | 158,460 | 145,161
Prepaid expenses and other current assets: |  |
Prepaid expenses | 49,589 | 41,784
Other | 3,973 | 5,799
Prepaid expenses and other current assets | 53,562 | 47,583
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 214,586 | 197,604
Less: accumulated amortization | (170,034) | (164,000)
Other acquired intangible assets, net | 44,552 | 33,604
Other assets: |  |
Deferred income taxes | 131,808 | 134,721
Capitalized software costs, net | 196,620 | 163,061
Patents, orbital slots and other licenses, net | 16,600 | 16,900
Other | 35,314 | 25,323
Other assets | 380,342 | 340,005
Accrued liabilities: |  |
Collections in excess of revenues and deferred revenues | 84,430 | 64,624
Accrued employee compensation | 39,206 | 35,056
Accrued vacation | 29,952 | 28,646
Warranty reserve, current portion | 7,859 | 7,867
Current portion of other long-term debt | 284 | 274
Other | 37,339 | 47,877
Accrued liabilities | 199,070 | 184,344
Other liabilities: |  |
Deferred revenue, long-term portion | 5,123 | 5,470
Deferred rent, long-term portion | 10,387 | 8,808
Warranty reserve, long-term portion | 3,644 | 3,567
Satellite performance incentives obligation, long-term portion | 19,372 | 19,514
Deferred income taxes, long-term | 2,213 | 12
Other liabilities | 40,739 | 37,371
Technology-Based Intangible Assets [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 87,214 | 74,848
Contracts and Customer Relationships [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 102,937 | 99,499
Satellite Co-Location Rights [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 8,600 | 8,600
Trade Names [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 5,940 | 5,940
Other Intangible Assets [Member] |  |
Other acquired intangible assets, net: |  |
Other acquired intangible assets, gross | 9,895 | 8,717
Satellites, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 1,355,169 | 1,173,880
Less: accumulated depreciation and amortization | (314,007) | (275,683)
Property and equipment, net | 1,041,162 | 898,197
Property and Equipment, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 1,179,608 | 1,050,886
Less: accumulated depreciation and amortization | (633,933) | (563,976)
Property and equipment, net | 545,675 | 486,910
Satellites [Member] | Satellites, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 559,380 | 559,094
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 | 696,699 | 515,696
Construction in Progress [Member] | Property and Equipment, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 99,976 | 73,535
Equipment and Software [Member] | Property and Equipment, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 650,307 | 568,663
CPE Leased Equipment [Member] | Property and Equipment, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 268,742 | 260,409
Less: accumulated depreciation and amortization | (153,400) | (136,400)
Furniture and Fixtures [Member] | Property and Equipment, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 29,767 | 25,501
Leasehold Improvements [Member] | Property and Equipment, Net [Member] |  |
Property and equipment, net: |  |
Property and equipment | 79,823 | 71,895
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 | $ 42,070 | $ 41,960

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