CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenue	$ 478,560	$ 383,807	$ 915,863	$ 736,084
Cost of goods and services	357,087	284,938	673,546	540,471
Gross profit	121,473	98,869	242,317	195,613
Selling, general and administrative expenses	103,675	81,933	209,482	160,817
Income from operations	17,798	16,936	32,835	34,796
Other income (expense)
Interest expense	(16,806)	(12,720)	(33,645)	(26,015)
Interest income	762	15	959	21
Other, net	1,434	(62)	966	(202)
Total other expense, net	(14,610)	(12,767)	(31,720)	(26,196)
Income before taxes from continuing operations	3,188	4,169	1,115	8,600
Provision (benefit) from income taxes	1,237	2,219	(23,667)	(394)
Income from continuing operations	1,951	1,950	24,782	8,994
Discontinued operations:
Income from operations of discontinued operations (including a gain on sale of $117,625 in 2018)	113,376	6,070	124,842	14,615
Provision for income taxes (including tax on gain on sale of $31,268 in 2018)	25,047	2,975	28,355	6,300
Income from discontinued operations (including a gain on sale, net of tax of $86,357 in 2018)	88,329	3,095	96,487	8,315
Net income	$ 90,280	$ 5,045	$ 121,269	$ 17,309
Income from continuing operations (in dollars per share)	$ 0.05	$ 0.05	$ 0.59	$ 0.22
Income from discontinued operations (in dollars per share)	2.13	0.07	2.31	0.21
Basic earnings per common share (in Dollars per share)	$ 2.18	$ 0.12	$ 2.91	$ 0.43
Weighted-average shares outstanding (in shares)	41,477	41,277	41,700	40,307
Income from continuing operations (in dollars per share)	$ 0.05	$ 0.05	$ 0.58	$ 0.21
Income from discontinued operations (in dollars per share)	2.07	0.07	2.24	0.19
Diluted earnings per common share (in dollars per share)	$ 2.11	$ 0.12	$ 2.82	$ 0.40
Weighted-average shares outstanding (in shares)	42,765	43,229	43,062	42,776
Dividends paid per common share (in Dollars per share)	$ 0.07	$ 0.06	$ 0.14	$ 0.12
Dividends paid per common share	$ 90,280	$ 5,045	$ 121,269	$ 17,309
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	19,714	8,409	18,425	(5,070)
Pension and other post retirement plans	247	544	9,806	1,088
Change in cash flow hedges	440	(1,020)	528	603
Total other comprehensive income (loss), net of taxes	20,401	7,933	28,759	(3,379)
Comprehensive income (loss), net	$ 110,681	$ 12,978	$ 150,028	$ 13,930