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Basis of Presentation - Additional Information (Detail 2) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 10 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 08, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Nov. 08, 2024 | Mar. 31, 2024
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Increase (decrease) in unbilled accounts receivable |  |  |  | $ 32,700 |  |  |
Insurance recovery proceeds |  |  |  | 197,500 |  |  |
Capitalized costs related to software developed for resale |  | $ 739,700 |  | 739,700 |  |  | $ 723,900
Capitalized cost related to software development for resale, additions |  | 19,000 | $ 15,000 | 37,800 | $ 31,000 |  |
Amortization expense of capitalized software development costs |  | 15,100 | 14,100 | 29,400 | 28,500 |  |
Capitalized Computer Software, Accumulated Amortization |  | 490,700 |  | 490,700 |  |  | 483,300
Gross capitalized implementation costs incurred in cloud computing arrangements |  | 75,600 |  | 75,600 |  |  | 63,600
Accumulated amortization related to capitalized implementation costs incurred in cloud computing arrangements |  | 13,000 |  | 13,000 |  |  | $ 9,500
Amortization of capitalized implementation costs incurred in cloud computing arrangements |  | $ 1,700 | $ 1,200 | $ 3,200 | $ 1,200 |  |
Maximum [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Estimated useful life, years |  | 20 years |  | 20 years |  |  |
Software Development Costs [Member] | Maximum [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Estimated useful life, years |  | 5 years |  | 5 years |  |  |
Funded Research and Development from Customer Contracts [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of revenue |  | 12.00% | 12.00% | 12.00% | 13.00% |  |
Fixed-price Contract [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of revenue |  | 96.00% | 96.00% | 96.00% | 95.00% |  |
U.S. Government as an Individual Customer [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of revenue |  | 18.00% | 16.00% | 17.00% | 16.00% |  |
Satellites [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Insurance recovery proceeds |  | $ 118,000 |  | $ 197,500 |  | $ 746,000 |
Satellites [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Insurance recovery proceeds | $ 40,000 |  |  |  |  |  |
Communication Services [Member] | Satellites [Member] | Selling General and Administrative Expenses [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Satellite impairment loss, net, including liabilities associated with the termination of certain subcontractor agreements |  |  | $ 900,000 |  |  |  |

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