CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Revenue	$ 613,627	$ 647,814	$ 1,857,744	$ 1,963,847
Cost of goods and services	348,379	398,665	1,076,009	1,207,392
Gross profit	265,248	249,149	781,735	756,455
Selling, general and administrative expenses	147,637	159,810	450,865	469,830
Goodwill and intangible asset impairments	243,612	0	243,612	0
Total operating expenses	391,249	159,810	694,477	469,830
Income (loss) from operations	(126,001)	89,339	87,258	286,625
Other income (expense)
Interest expense	(24,137)	(27,024)	(72,954)	(78,472)
Interest income	569	769	1,683	1,830
Gain (loss) on sale of real estate	122	(725)	8,279	(167)
Loss from debt extinguishment	0	(1,700)	0	(1,700)
Other, net	247	350	2,591	1,608
Total other expense, net	(23,199)	(28,330)	(60,401)	(76,901)
Income (loss) before taxes	(149,200)	61,009	26,857	209,724
Provision (benefit) for income taxes	(29,061)	19,923	19,383	62,318
Net income (loss)	$ (120,139)	$ 41,086	$ 7,474	$ 147,406
Basic earnings per common share (in dollars per share)	$ (2.65)	$ 0.87	$ 0.16	$ 3.08
Basic weighted-average shares outstanding (in shares)	45,320	47,034	45,505	47,921
Diluted earnings per common share (in dollars per share)	$ (2.65)	$ 0.84	$ 0.16	$ 2.94
Diluted weighted-average shares outstanding (in shares)	45,320	48,851	46,911	50,085
Dividends paid per common share (in dollars per share)	$ 0.18	$ 0.15	$ 0.54	$ 0.45
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	$ 12,244	$ (827)	$ (4,804)	$ 2,212
Pension and other post retirement plans	897	532	1,493	1,595
Change in cash flow hedges	(695)	(927)	475	550
Total other comprehensive income (loss), net of taxes	12,446	(1,222)	(2,836)	4,357
Comprehensive income (loss), net	$ (107,693)	$ 39,864	$ 4,638	$ 151,763