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Segment Information (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2022 USD ($) geographic_region segment	Sep. 30, 2021 USD ($) segment geographic_region	Sep. 30, 2020 USD ($) segment geographic_region
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment	1	1	1
Number of Geographic Regions | geographic_region	3	3	3
Net revenues	$ 2,695,845	$ 2,603,416	$ 2,350,822
Property and equipment, net	168,182	191,164
Product [Member]
Segment Reporting Information [Line Items]
Net revenues	1,317,117	1,247,084	1,025,856
Product [Member] | Systems
Segment Reporting Information [Line Items]
Net revenues	651,902	748,192	668,313
Product [Member] | Software
Segment Reporting Information [Line Items]
Net revenues	665,215	498,892	357,543
United States [Member]
Segment Reporting Information [Line Items]
Net revenues	1,487,144	1,365,625	1,221,190
Property and equipment, net	134,699	153,030
Other Americas [Member]
Segment Reporting Information [Line Items]
Net revenues	85,711	92,111	95,878
Americas [Member]
Segment Reporting Information [Line Items]
Net revenues	1,572,855	1,457,736	1,317,068
EMEA [Member]
Segment Reporting Information [Line Items]
Net revenues	634,759	667,219	593,307
Property and equipment, net	17,376	20,526
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net revenues	488,231	478,461	$ 440,447
Other International Countries [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	$ 16,107	$ 17,608
Customer One [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	20.00%	19.20%	16.70%
Customer One [Member] | Geographic Concentration Risk [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	12.90%	12.60%
Customer Two [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	13.40%	11.10%	0.00%
Customer Two [Member] | Geographic Concentration Risk [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	12.60%	11.90%
Customer Three [Member] | Geographic Concentration Risk [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	16.20%	11.50%

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