Condensed Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 586,839	$ 581,321	$ 1,128,425	$ 1,118,940
Costs and expenses:
Cost of goods sold	453,425	434,243	872,576	835,883
Selling, general and administrative expenses	44,124	44,329	106,430	100,440
Research and development costs	32,384	27,627	57,776	59,623
Interest expense	8,197	8,249	16,503	17,155
Interest income	(500)	(283)	(1,141)	(778)
Other (income) expense, net	(4,887)	(11,331)	(15,561)	(19,454)
Total costs and expenses	532,743	502,834	1,036,583	992,869
Earnings before income taxes	54,096	78,487	91,842	126,071
Income tax expense	6,190	10,174	13,631	16,188
Net earnings	$ 47,906	$ 68,313	$ 78,211	$ 109,883
Earnings per share:
Basic earnings per share	$ 0.77	$ 1.08	$ 1.24	$ 1.74
Diluted earnings per share	$ 0.74	$ 1.04	$ 1.21	$ 1.68
Weighted Average Common Shares Outstanding:
Basic	62,550	63,278	62,825	63,043
Diluted	64,618	65,654	64,863	65,274