Segment Information (Summary of Consolidated Net Sales and Segment Operating Profit by Segment) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Segment Reporting [Line Items] | ||||||
| Net sales | $ 1,109,705 | $ 915,446 | $ 3,196,727 | $ 2,571,800 | ||
| Cost of goods sold | 759,799 | 666,287 | 2,238,752 | 1,892,908 | ||
| Selling, general and administrative expenses | 106,465 | 88,703 | 303,735 | 242,241 | ||
| Research and development costs | 49,316 | 41,088 | 133,191 | 108,525 | ||
| Aerospace [Member] | ||||||
| Segment Reporting [Line Items] | ||||||
| Net sales | 708,673 | 595,990 | 2,046,891 | 1,651,601 | ||
| Industrial [Member] | ||||||
| Segment Reporting [Line Items] | ||||||
| Net sales | 401,032 | 319,456 | 1,149,836 | 920,199 | ||
| Operating Segments [Member] | ||||||
| Segment Reporting [Line Items] | ||||||
| Net sales | 1,109,705 | 915,446 | 3,196,727 | 2,571,800 | ||
| Cost of goods sold | 758,117 | 665,682 | 2,236,408 | 1,891,120 | ||
| Selling, general and administrative expenses | 63,956 | 51,574 | 190,764 | 140,456 | ||
| Research and development costs | 47,398 | 39,564 | 128,010 | 104,053 | ||
| Other segment items | [1] | (18,270) | (14,736) | (56,144) | (42,696) | |
| Reportable segment operating profit | 258,504 | 173,362 | 697,689 | 478,867 | ||
| Operating Segments [Member] | Aerospace [Member] | ||||||
| Segment Reporting [Line Items] | ||||||
| Net sales | 708,673 | 595,990 | 2,046,891 | 1,651,601 | ||
| Cost of goods sold | 489,027 | 436,516 | 1,448,885 | 1,219,331 | ||
| Selling, general and administrative expenses | 34,235 | 21,353 | 90,766 | 62,318 | ||
| Research and development costs | 32,724 | 25,732 | 84,158 | 64,583 | ||
| Other segment items | [1] | (17,333) | (13,351) | (53,408) | (39,712) | |
| Reportable segment operating profit | 170,020 | 125,740 | 476,490 | 345,081 | ||
| Operating Segments [Member] | Industrial [Member] | ||||||
| Segment Reporting [Line Items] | ||||||
| Net sales | 401,032 | 319,456 | 1,149,836 | 920,199 | ||
| Cost of goods sold | 269,090 | 229,166 | 787,523 | 671,789 | ||
| Selling, general and administrative expenses | 29,721 | 30,221 | 99,998 | 78,138 | ||
| Research and development costs | 14,674 | 13,832 | 43,852 | 39,470 | ||
| Other segment items | [1] | (937) | (1,385) | (2,736) | (2,984) | |
| Reportable segment operating profit | $ 88,484 | $ 47,622 | $ 221,199 | $ 133,786 | ||
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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of other expense (income) and loss (gain) calculated as difference between segment revenue and separately disclosed expense category to arrive at segment profit (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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