Acquisitions (Details) - USD ($) $ in Thousands			12 Months Ended
	Aug. 09, 2021	Jul. 29, 2021	Sep. 30, 2021	Sep. 30, 2019	Sep. 30, 2020
Business Acquisition [Line Items]
Payments to acquire businesses net of cash acquired			$ 168,903	$ 95,840
Goodwill			504,853	$ 390,300	$ 408,063
Goodwill, tax deductible expenses			$ 13,746		$ 7,878
Altanova Group
Business Acquisition [Line Items]
Payments to acquire businesses net of cash acquired		$ 115,000
Goodwill		71,900
Business combination contingent consideration liability		6,900
Business combination recognized identifiable assets acquired and liabilities assumed, property, plant and equipment		1,200
Business combination recognized identifiable assets acquired and liabilities assumed deferred tax liabilities		16,400
Business combination recognized identifiable assets acquired and liabilities assumed current assets receivables		9,700
Business combination recognized identifiable assets acquired and liabilities assumed inventory		5,600
Business combination recognized identifiable assets acquired and liabilities assumed other noncurrent assets		8,000
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accounts payable		$ 12,800
Altanova Group | Customer relationships
Business Acquisition [Line Items]
Acquired finite-lived intangible assets weighted average useful life		20 years
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets		$ 50,500
Altanova Group | Trade Names
Business Acquisition [Line Items]
Acquired finite-lived intangible assets weighted average useful life		10 years
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets		$ 4,300
Phenix Technologies
Business Acquisition [Line Items]
Payments to acquire businesses net of cash acquired	$ 47,200
Goodwill	23,200
Business combination recognized identifiable assets acquired and liabilities assumed, property, plant and equipment	8,000
Business combination recognized identifiable assets acquired and liabilities assumed current assets receivables	2,600
Business combination recognized identifiable assets acquired and liabilities assumed inventory	5,800
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accounts payable	6,200
Goodwill, tax deductible expenses	$ 20,000
Phenix Technologies | Customer relationships
Business Acquisition [Line Items]
Acquired finite-lived intangible assets weighted average useful life	13 years
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets	$ 9,600
Phenix Technologies | Customer Relationships and Developed Technology
Business Acquisition [Line Items]
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets	500
Phenix Technologies | Trade Names
Business Acquisition [Line Items]
Business combination recognized identifiable assets acquired and liabilities assumed indefinite-lived intangible assets	$ 3,700