Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net sales	$ 434,369	$ 387,553	$ 1,093,221	$ 981,504
Cost of sales	270,045	255,639	681,174	696,529
Gross profit	164,324	131,914	412,047	284,975
Selling, general and administrative expenses	88,598	72,490	249,042	220,211
Other general expenses	0	1,065	0	1,065
Loss (gain) on disposal of property, plant and equipment	(49)	95	2,049	278
Operating income	75,775	58,264	160,956	63,421
Other income and expenses:
Interest expense, net	7,863	10,408	24,453	30,481
Gain on sale of business	(90)	0	(38,390)	0
Total other (income) and expenses	7,773	10,408	(13,937)	30,481
Income before income taxes	68,002	47,856	174,893	32,940
Income tax expense	17,892	13,216	49,877	9,810
Net income	50,110	34,640	125,016	23,130
Other comprehensive income (loss):
Unrealized gain (loss) due to change in fair value of derivatives, net of tax	236	3,953	(951)	691
Total other comprehensive income (loss)	236	3,953	(951)	691
Comprehensive income	$ 50,346	$ 38,593	$ 124,065	$ 23,821
Net income per common share:
Basic (in dollars per share)	$ 0.34	$ 0.23	$ 0.86	$ 0.15
Diluted (in dollars per share)	$ 0.34	$ 0.23	$ 0.84	$ 0.15
Weighted-average common shares outstanding:
Basic (in shares)	145,439,955	150,140,392	146,159,550	150,610,890
Diluted (in shares)	147,495,902	151,069,954	148,011,393	151,056,199