CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) shares in Thousands, $ in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2018 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares
Income Statement [Abstract]
Revenue	$ 2,209,289	$ 1,977,918	$ 1,524,997
Cost of goods and services	1,614,020	1,448,737	1,116,871
Gross profit	595,269	529,181	408,126
Selling, general and administrative expenses	460,004	436,380	341,092
Income from continuing operations	135,265	92,801	67,034
Other income (expense)
Interest expense	(68,066)	(65,568)	(51,513)
Interest income	806	1,697	64
Other, net	4,173	4,880	1,113
Total other income (expense)	(63,087)	(58,991)	(50,336)
Income before taxes from continuing operations	72,178	33,810	16,698
Provision (benefit) for income taxes	26,556	555	(1,085)
Income (loss) from continuing operations	45,622	33,255	17,783
Discontinued operations:
Income (loss) from operations of discontinued businesses	(11,050)	119,981	22,276
Provision for income taxes	(2,715)	27,558	25,147
Income (loss) from discontinued operations	(8,335)	92,423	(2,871)
Net income	$ 37,287	$ 125,678	$ 14,912
Income from continuing operations (in usd per share) | $ / shares	$ 1.11	$ 0.81	$ 0.43
Income from discontinued operations (in usd per share) | $ / shares	(0.20)	2.25	(0.07)
Basic earnings per common share (in Dollars per share) | $ / shares	$ 0.91	$ 3.06	$ 0.36
Weighted-average shares outstanding (in Shares) | shares	40,934	41,005	41,005
Income from continuing operations (in usd per share) | $ / shares	$ 1.06	$ 0.78	$ 0.41
Income from discontinued operations (in usd per share) | $ / shares	(0.20)	2.18	(0.07)
Diluted earnings per common share (in usd per share) | $ / shares	$ 0.87	$ 2.96	$ 0.35
Weighted-average shares outstanding (in Shares) | shares	42,888	42,422	43,011
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	$ (8,460)	$ 9,403	$ 10,667
Pension and other post retirement plans	(23,055)	16,381	9,203
Gain (loss) on cash flow hedge	(289)	585	890
Total other comprehensive income (loss), net of taxes	(31,804)	26,369	20,760
Comprehensive income	$ 5,483	$ 152,047	$ 35,672