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Acquisitions (Details) - USD ($) $ in Thousands |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 01, 2023 | Nov. 04, 2021 | Aug. 09, 2021 | Jul. 29, 2021 | Jun. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Acquisitions |  |  |  |  |  |  |  |
Payments to acquire businesses net of cash acquired |  |  |  |  |  | $ 17,694 | $ 10,906 | $ 168,903
Goodwill |  |  |  |  |  | 503,177 | 492,709 | $ 504,900
Working capital settlement |  |  |  |  | $ 200 |  |  |
Goodwill, tax deductible expenses |  |  |  |  |  | $ 13,313 | 11,691 |
Phenix Technologies |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Payments to acquire businesses net of cash acquired |  |  | $ 47,200 |  |  |  |  |
Fair value of accounts receivable acquired |  |  | 2,600 |  |  |  |  |
Fair value of inventory acquired |  |  | 5,800 |  |  |  |  |
Fair value of property, plant and equipment acquired |  |  | 8,000 |  |  |  |  |
Goodwill |  |  | 18,700 |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accounts payable |  |  | 6,200 |  |  |  |  |
Goodwill, tax deductible expenses |  |  | 15,000 |  |  |  |  |
Amount received on finalization of working capital adjustment |  |  |  |  |  |  | $ 4,600 |
Networks electronic company |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Payments to acquire businesses net of cash acquired |  | $ 15,400 |  |  |  |  |  |
Fair value of accounts receivable acquired |  | 600 |  |  |  |  |  |
Fair value of inventory acquired |  | 1,500 |  |  |  |  |  |
Fair value of property, plant and equipment acquired |  | 200 |  |  |  |  |  |
Fair value of identifiable intangible assets acquired |  | 8,100 |  |  |  |  |  |
Goodwill |  | 5,700 |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accounts payable |  | 700 |  |  |  |  |  |
I.s.a. Altanova Group S.r.l. Altanova |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Payments to acquire businesses net of cash acquired |  |  |  | $ 115,000 |  |  |  |
Fair value of accounts receivable acquired |  |  |  | 9,700 |  |  |  |
Fair value of inventory acquired |  |  |  | 5,600 |  |  |  |
Fair value of property, plant and equipment acquired |  |  |  | 1,200 |  |  |  |
Goodwill |  |  |  | 71,100 |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accounts payable |  |  |  | 12,800 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  |  |  | 16,700 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets |  |  |  | 9,000 |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  | 6,900 |  |  |  |
CMT Materials, LLC and its affiliate Engineered Syntactic Systems, LLC |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Payments to acquire businesses net of cash acquired | $ 18,000 |  |  |  |  |  |  |
Fair value of accounts receivable acquired | 1,700 |  |  |  |  |  |  |
Fair value of inventory acquired | 3,000 |  |  |  |  |  |  |
Fair value of property, plant and equipment acquired | 1,300 |  |  |  |  |  |  |
Fair value of accounts payable and accrued expenses acquired | 1,200 |  |  |  |  |  |  |
Fair value of identifiable intangible assets acquired | 7,300 |  |  |  |  |  |  |
Goodwill | 5,600 |  |  |  |  |  |  |
Customer Relationships | Phenix Technologies |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets |  |  | $ 9,600 |  |  |  |  |
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 13 years |  |  |  |  |
Customer Relationships | Networks electronic company |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets |  | $ 6,300 |  |  |  |  |  |
Customer Relationships | I.s.a. Altanova Group S.r.l. Altanova |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets |  |  |  | $ 50,500 |  |  |  |
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  |  | 20 years |  |  |  |
Customer Relationships | CMT Materials, LLC and its affiliate Engineered Syntactic Systems, LLC |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed finite-lived intangibles | $ 6,200 |  |  |  |  |  |  |
Customer Relationships and Developed Technology | Phenix Technologies |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets |  |  | $ 500 |  |  |  |  |
Trade Names | Phenix Technologies |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets |  |  | $ 3,700 |  |  |  |  |
Trade Names | I.s.a. Altanova Group S.r.l. Altanova |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets |  |  |  | $ 4,300 |  |  |  |
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  |  | 10 years |  |  |  |

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