Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenues	$ 255,108	$ 171,444	$ 449,125	$ 298,302
Cost of goods sold	192,388	138,007	338,211	245,401
Gross profit	62,720	33,437	110,914	52,901
Selling, general and administrative expenses	20,947	21,820	41,294	38,693
Research and development expenses	2,284	1,543	4,251	3,044
Operating income	39,489	10,074	65,369	11,164
Interest income, net	(4,428)	(899)	(8,426)	(1,423)
Income before income taxes	43,917	10,973	73,795	12,587
Income tax provision	10,429	2,500	16,222	2,951
Net income	$ 33,488	$ 8,473	$ 57,573	$ 9,636
Earnings per share:
Basic (in dollars per share)	$ 2.79	$ 0.71	$ 4.81	$ 0.81
Diluted (in dollars per share)	$ 2.75	$ 0.70	$ 4.73	$ 0.80
Weighted average shares:
Basic (in shares)	11,992	11,878	11,966	11,869
Diluted (in shares)	12,191	12,149	12,167	12,109
Dividends per share (in dollars per share)	$ 0.2650	$ 0.2625	$ 0.5275	$ 0.5225