Business Segment Information - Schedule Of Depreciation And Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Depreciation and Amortization	$ 48,343	$ 42,049	$ 41,338
Aerospace & Defense
Depreciation and Amortization	11,100	10,400	9,400
USG
Depreciation and Amortization	12,600	13,500	14,400
Test
Depreciation and Amortization	5,400	5,200	5,000
Corporate
Depreciation and Amortization	$ 19,200	$ 12,900	$ 12,500