Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Total net sales	$ 586,839	$ 581,321	$ 1,128,425	$ 1,118,940
Interest expense, net	(7,697)	(7,966)	(15,362)	(16,377)
Consolidated earnings before income taxes	54,096	78,487	91,842	126,071
Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	372,757	364,706	709,192	686,373
Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	214,082	216,615	419,233	432,567
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	372,757	364,706	709,192	686,373
Segment earnings (loss)	59,809	69,008	110,892	115,474
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	214,082	216,615	419,233	432,567
Segment earnings (loss)	17,234	27,871	40,927	60,759
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (15,250)	$ (10,426)	$ (44,615)	$ (33,785)