CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - 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]
Revenue	$ 779,617	$ 574,682	$ 1,371,366	$ 1,116,205
Cost of goods and services	518,974	413,476	944,881	790,863
Gross profit	260,643	161,206	426,485	325,342
Selling, general and administrative expenses	157,838	117,559	285,190	229,268
Income from operations	102,805	43,647	141,295	96,074
Other income (expense)
Interest expense	(21,408)	(15,831)	(37,089)	(31,521)
Interest income	32	304	65	348
Other, net	1,675	1,081	3,056	1,438
Total other expense, net	(19,701)	(14,446)	(33,968)	(29,735)
Income before taxes from continuing operations	83,104	29,201	107,327	66,339
Provision for income taxes	24,533	11,082	31,851	22,790
Income from continuing operations	58,571	18,119	75,476	43,549
Discontinued operations:
Income (loss) from operations of discontinued operations	694	(1,341)	3,708	690
Provision (benefit) for income taxes	(6,424)	(334)	(5,803)	(2,373)
Income (loss) from discontinued operations	7,118	(1,007)	9,511	3,063
Net income	$ 65,689	$ 17,112	$ 84,987	$ 46,612
Basic earnings per common share:
Income from continuing operations (in dollars per share)	$ 1.13	$ 0.36	$ 1.47	$ 0.86
Income (loss) from discontinued operations (in dollars per share)	0.14	(0.02)	0.18	0.06
Basic earnings per common share (in dollars per share)	$ 1.27	$ 0.34	$ 1.65	$ 0.92
Basic weighted-average shares outstanding (in shares)	51,668	50,838	51,423	50,717
Diluted earnings per common share:
Income from continuing operations (in dollars per share)	$ 1.10	$ 0.34	$ 1.41	$ 0.82
Income (loss) from discontinued operations (in dollars per share)	0.13	(0.02)	0.18	0.06
Diluted earnings per common share (in dollars per share)	$ 1.23	$ 0.32	$ 1.59	$ 0.88
Diluted weighted-average shares outstanding (in shares)	53,430	53,264	53,602	53,211
Dividends paid per common share (in dollars per share)	$ 0.09	$ 0.08	$ 0.18	$ 0.16
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	$ 6,049	$ 1,739	$ 3,730	$ 13,862
Pension and other post retirement plans	140	1,245	808	2,951
Change in cash flow hedges	(1,240)	1,791	(2,340)	1,103
Total other comprehensive income, net of taxes	4,949	4,775	2,198	17,916
Comprehensive income, net	$ 70,638	$ 21,887	$ 87,185	$ 64,528