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Business Segment Information - Schedule Of Depreciation And Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Depreciation and Amortization	$ 55,409	$ 50,523	$ 48,343
Corporate
Depreciation and Amortization	20,800	18,600	19,200
Operating Segments | A&D
Depreciation and Amortization	13,600	12,600	11,100
Operating Segments | USG
Depreciation and Amortization	15,700	14,000	12,600
Operating Segments | Test
Depreciation and Amortization	$ 5,300	$ 5,300	$ 5,400

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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