CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue	$ 710,984	$ 779,617	$ 1,360,368	$ 1,371,366
Cost of goods and services	516,492	518,974	932,051	944,881
Gross profit	194,492	260,643	428,317	426,485
Selling, general and administrative expenses	160,301	157,838	313,021	285,190
Intangible asset impairment	100,000	0	100,000	0
Total operating expenses	260,301	157,838	413,021	285,190
Income (loss) from operations	(65,809)	102,805	15,296	141,295
Other income (expense)
Interest expense	(24,879)	(21,408)	(49,527)	(37,089)
Interest income	236	32	340	65
Gain on sale of building	0	0	10,852	0
Other, net	293	1,369	900	2,444
Total other expense, net	(24,350)	(20,007)	(37,435)	(34,580)
Income (loss) before taxes from continuing operations	(90,159)	82,798	(22,139)	106,715
Provision (benefit) for income taxes	(27,904)	24,638	(8,586)	31,851
Income (loss) from continuing operations	(62,255)	58,160	(13,553)	74,864
Discontinued operations:
Income from operations of discontinued operations	0	1,000	0	4,320
Provision (benefit) for income taxes	0	(6,529)	0	(5,803)
Income from discontinued operations	0	7,529	0	10,123
Net income (loss)	$ (62,255)	$ 65,689	$ (13,553)	$ 84,987
Basic earnings per common share:
Income (loss) from continuing operations (in dollars per share)	$ (1.17)	$ 1.13	$ (0.26)	$ 1.46
Income from discontinued operations (in dollars per share)	0	0.15	0	0.20
Basic (loss) earnings per common share (in dollars per share)	$ (1.17)	$ 1.27	$ (0.26)	$ 1.65
Basic weighted-average shares outstanding (in shares)	53,038	51,668	52,809	51,423
Diluted earnings per common share:
Income (loss) from continuing operations (in dollars per share)	$ (1.17)	$ 1.09	$ (0.26)	$ 1.40
Income from discontinued operations (in dollars per share)	0	0.14	0	0.19
Diluted earnings (loss) per common share (in dollars per share)	$ (1.17)	$ 1.23	$ (0.26)	$ 1.59
Diluted weighted-average shares outstanding (in shares)	53,038	53,430	52,809	53,602
Dividends paid per common share (in dollars per share)	$ 0.10	$ 0.09	$ 0.20	$ 0.18
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	$ 334	$ 6,049	$ 12,271	$ 3,730
Pension and other post retirement plans	746	140	1,608	808
Change in cash flow hedges	1,533	(1,240)	953	(2,340)
Total other comprehensive income (loss), net of taxes	2,613	4,949	14,832	2,198
Comprehensive income (loss), net	$ (59,642)	$ 70,638	$ 1,279	$ 87,185