Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Revenue:
Total revenue	$ 2,097,053	$ 1,933,347	$ 1,807,159
Cost of revenue:
Total cost of revenue	441,006	385,980	371,102
Gross margin	1,656,047	1,547,367	1,436,057
Operating expenses:
Sales and marketing	530,125	485,247	517,779
Research and development	394,370	338,822	299,917
General and administrative	233,516	204,732	206,006
Amortization of acquired intangible assets	40,022	34,970	29,396
Restructuring and other charges (credits), net	(460)	36,234	2,211
Total operating expenses	1,197,573	1,100,005	1,055,309
Operating income	458,474	447,362	380,748
Interest and debt premium expense	(129,417)	(54,268)	(50,478)
Other income, net	3,509	4,004	61,485
Income before income taxes	332,566	397,098	391,755
Provision (benefit) for income taxes	87,026	84,017	(85,168)
Net income	$ 245,540	$ 313,081	$ 476,923
Earnings per share-Basic	$ 2.07	$ 2.67	$ 4.08
Earnings per share-Diluted	$ 2.06	$ 2.65	$ 4.03
Weighted-average shares outstanding—Basic	118,341	117,194	116,836
Weighted-average shares outstanding—Diluted	119,334	118,233	118,367
License
Revenue:
License	$ 747,022	$ 782,680	$ 738,053
Cost of revenue:
Cost of license revenue	53,200	49,240	61,750
Support and cloud services
Revenue:
Support and cloud services	1,199,536	987,573	911,288
Cost of revenue:
Cost of support and cloud services revenue	245,027	184,789	164,108
Software
Revenue:
Total software revenue	1,946,558	1,770,253	1,649,341
Cost of revenue:
Total cost of software revenue	298,227	234,029	225,858
Professional services
Revenue:
Professional services	150,495	163,094	157,818
Cost of revenue:
Cost of professional services revenue	$ 142,779	$ 151,951	$ 145,244