Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Consolidated net sales	$ 2,245,832	$ 2,495,665	$ 2,900,197
Interest Expense, net	(32,787)	(34,047)	(42,588)
Consolidated earnings before income taxes	245,799	281,881	320,612
Aerospace [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	1,404,117	1,590,963	1,880,520
Industrial [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	841,715	904,702	1,019,677
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	1,404,117	1,590,963	1,880,520
Segment earnings (loss)	234,356	310,137	389,126
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	841,715	904,702	1,019,677
Segment earnings (loss)	108,672	100,321	93,521
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (64,442)	$ (94,530)	$ (119,447)