Goodwill (Schedule) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Goodwill [Roll Forward]
Goodwill, beginning of the period	$ 411,346	$ 321,913
Business combinations	1,738	92,272
Measurement period adjustment	(1,874)	(715)
Goodwill reclassified to assets held for sale	(14,911)
Foreign currency translation	(3,409)	(2,124)
Goodwill, end of the period	392,890	411,346
Integrated Solutions and Services
Goodwill [Roll Forward]
Goodwill, beginning of the period		138,181
Business combinations		88,080
Measurement period adjustment		(404)
Foreign currency translation		(1,487)
Applied Product Technologies
Goodwill [Roll Forward]
Goodwill, beginning of the period		183,732
Business combinations		4,192
Measurement period adjustment		(311)
Foreign currency translation		(637)
Operating Segments [Member] \| Integrated Solutions and Services
Goodwill [Roll Forward]
Goodwill, beginning of the period	224,370
Business combinations	0
Measurement period adjustment	(1,937)
Goodwill reclassified to assets held for sale	0
Foreign currency translation	(420)
Goodwill, end of the period	222,013	224,370
Operating Segments [Member] \| Applied Product Technologies
Goodwill [Roll Forward]
Goodwill, beginning of the period	186,976
Business combinations	1,738
Measurement period adjustment	63
Goodwill reclassified to assets held for sale	(14,911)
Foreign currency translation	(2,989)
Goodwill, end of the period	$ 170,877	$ 186,976

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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