Segment Information (U.S. Government Related Sales by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Entity Wide Revenue Major Customer [Line Items]
Net sales	$ 2,382,790	$ 2,245,832	$ 2,495,665
Aerospace [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	1,519,322	1,404,117	1,590,963
Industrial [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	863,468	841,715	904,702
Direct Sales to U.S. Government [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	98,025	124,564	155,283
Direct Sales to U.S. Government [Member] | Aerospace [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	93,266	116,832	149,416
Direct Sales to U.S. Government [Member] | Industrial [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	$ 4,759	$ 7,732	$ 5,867
Direct Sales to U.S. Government [Member] | Sales [Member] | Product Concentration Risk [Member]
Entity Wide Revenue Major Customer [Line Items]
Percentage of attributable to revenue	4.00%	6.00%	6.00%
Indirect Sales to U.S. Government [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	$ 439,698	$ 528,560	$ 553,897
Indirect Sales to U.S. Government [Member] | Aerospace [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	433,646	526,118	536,424
Indirect Sales to U.S. Government [Member] | Industrial [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	$ 6,052	$ 2,442	$ 17,473
Indirect Sales to U.S. Government [Member] | Sales [Member] | Product Concentration Risk [Member]
Entity Wide Revenue Major Customer [Line Items]
Percentage of attributable to revenue	19.00%	23.00%	22.00%
U.S. Government Related [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	$ 537,723	$ 653,124	$ 709,180
U.S. Government Related [Member] | Aerospace [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	526,912	642,950	685,840
U.S. Government Related [Member] | Industrial [Member]
Entity Wide Revenue Major Customer [Line Items]
Net sales	$ 10,811	$ 10,174	$ 23,340
U.S. Government Related [Member] | Sales [Member] | Product Concentration Risk [Member]
Entity Wide Revenue Major Customer [Line Items]
Percentage of attributable to revenue	23.00%	29.00%	28.00%