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Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total net sales	$ 523,826	$ 752,005	$ 1,964,401	$ 2,163,660
Interest expense, net	(8,360)	(10,450)	(25,162)	(33,143)
Consolidated earnings before income taxes	45,016	92,314	213,763	243,997
Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	306,494	498,775	1,254,655	1,374,616
Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	217,332	253,230	709,746	789,044
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	306,494	498,775	1,254,655	1,374,616
Segment earnings (loss)	41,096	103,238	251,645	277,814
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	217,332	253,230	709,746	789,044
Segment earnings (loss)	27,438	26,240	81,640	82,537
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (15,158)	$ (26,714)	$ (94,360)	$ (83,211)

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