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Balance Sheet Details (Tables) | 12 Months Ended
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Sep. 30, 2023
Balance Sheet Details [Abstract] |
Cash, Cash Equivalents and Restricted Cash | The following table provides a reconciliation of the Company’s cash and cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash shown in the Company’s consolidated statements of cash flows for the periods presented (in thousands):
|  | September 30,
|  | 2023 |  | 2022
Cash and cash equivalents |  | $ | 797,163 |  |  | $ | 758,012 |
Restricted cash included in other assets, net |  | 3,672 |  |  | 4,195 |
Total cash, cash equivalents and restricted cash |  | $ | 800,835 |  |  | $ | 762,207 |
Inventories | Inventories consist of the following (in thousands):
|  | September 30,
|  | 2023 |  | 2022
Finished goods |  | $ | 11,699 |  |  | $ | 10,164 |
Raw materials |  | 24,175 |  |  | 58,201 |
|  | $ | 35,874 |  |  | $ | 68,365 |
Other Current Assets | Other current assets consist of the following (in thousands):
|  | September 30,
|  | 2023 |  | 2022
Unbilled receivables |  | $ | 374,113 |  |  | $ | 319,707 |
Prepaid expenses |  | 84,506 |  |  | 57,340 |
Capitalized contract acquisition costs |  | 31,206 |  |  | 34,658 |
Other 1 |  | 64,919 |  |  | 77,609 |
|  | $ | 554,744 |  |  | $ | 489,314 |
(1) As of September 30, 2023 and 2022, includes a deposit of $36.2 million and $57.0 million, respectively, used to support the working capital needs of the Company’s primary contract manufacturer's procurement of components used in the manufacturing of system hardware.
Property, Plant and Equipment | Property and Equipment Property and equipment are stated at net book value. Depreciation of property and equipment is provided using the straight-line method over the estimated useful lives of the assets, ranging from two to five years. Leasehold improvements are amortized over the lesser of the remaining lease term or the estimated useful life of the improvements. The cost of normal maintenance and repairs is charged to expense as incurred and expenditures for major improvements are capitalized at cost. Gains or losses on the disposition of assets are reflected in the consolidated income statements at the time of disposal. Property and equipment consist of the following (in thousands):
|  | September 30,
|  | 2023 |  | 2022
Computer equipment |  | $ | 189,555 |  |  | $ | 168,204 |
Software |  | 78,184 |  |  | 86,036 |
Office furniture and equipment |  | 44,525 |  |  | 41,619 |
Leasehold improvements |  | 185,225 |  |  | 173,689 |
|  | 497,489 |  |  | 469,548 |
Accumulated depreciation and amortization |  | (327,067) |  |  | (301,366) |
|  | $ | 170,422 |  |  | $ | 168,182 |
Goodwill | Changes in the carrying amount of goodwill during fiscal years 2023 and 2022 are summarized as follows (in thousands):
Balance, September 30, 2021 |  | $ | 2,216,553 |
Acquisition of Threat Stack, Inc. |  | 43,956 |
Other |  | (1,227) |
Balance, September 30, 2022 |  | 2,259,282 |
Other business acquisitions |  | 29,396 |
Balance, September 30, 2023 |  | $ | 2,288,678 |
Other Assets | Other assets consist of the following (in thousands):
|  | September 30,
|  | 2023 |  | 2022
Intangible assets |  | $ | 150,969 |  |  | $ | 200,288 |
Unbilled receivables |  | 202,838 |  |  | 224,780 |
Capitalized contract acquisition costs |  | 35,263 |  |  | 42,561 |
Other |  | 55,543 |  |  | 48,493 |
|  | $ | 444,613 |  |  | $ | 516,122 |
Intangible Assets | Intangible assets are included in other assets on the consolidated balance sheets and consist of the following (in thousands):
|  | September 30, 2023 |  | September 30, 2022
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Developed technology |  | $ | 319,368 |  |  | $ | (190,135) |  |  | $ | 129,233 |  |  | $ | 319,436 |  |  | $ | (151,332) |  |  | $ | 168,104 |
Customer relationships |  | 45,642 |  |  | (33,298) |  |  | 12,344 |  |  | 46,142 |  |  | (25,630) |  |  | 20,512 |
Patents and trademarks |  | 13,699 |  |  | (9,658) |  |  | 4,041 |  |  | 23,504 |  |  | (19,255) |  |  | 4,249 |
Trade names |  | 15,473 |  |  | (10,122) |  |  | 5,351 |  |  | 24,973 |  |  | (17,550) |  |  | 7,423 |
Non-compete covenants |  | 1,960 |  |  | (1,960) |  |  | — |  |  | 2,260 |  |  | (2,260) |  |  | — |
|  | $ | 396,142 |  |  | $ | (245,173) |  |  | $ | 150,969 |  |  | $ | 416,315 |  |  | $ | (216,027) |  |  | $ | 200,288 |
Estimated Amortization Expense For Intangible Assets | For intangible assets held as of September 30, 2023, amortization expense for the five succeeding fiscal years is as follows (in thousands):
2024 | $ | 50,914 |
2025 | 39,477 |
2026 | 34,723 |
2027 | 16,541 |
2028 | 4,106 |
| $ | 145,761 |
Accrued Liabilities | Accrued liabilities consist of the following (in thousands):
|  | September 30,
|  | 2023 |  | 2022
Payroll and benefits |  | $ | 152,898 |  |  | $ | 165,437 |
Operating lease liabilities, current |  | 41,421 |  |  | 42,523 |
Income and other tax accruals |  | 34,504 |  |  | 41,217 |
Other |  | 54,067 |  |  | 60,642 |
|  | $ | 282,890 |  |  | $ | 309,819 |
Other Long-term Liabilities | Other long-term liabilities consist of the following (in thousands):
|  | September 30,
|  | 2023 |  | 2022
Income taxes payable |  | $ | 73,751 |  |  | $ | 59,553 |
Other |  | 8,822 |  |  | 8,157 |
|  | $ | 82,573 |  |  | $ | 67,710 |

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