Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Revenue	$ 1,458,415	$ 1,255,631	$ 1,241,824
Cost of revenue:
Cost of revenue	334,271	325,378	326,502
Gross margin	1,124,144	930,253	915,322
Operating expenses:
Sales and marketing	435,451	417,449	414,764
Research and development	256,575	246,888	249,786
General and administrative	159,826	127,919	143,045
Amortization of acquired intangible assets	28,713	23,841	31,350
Restructuring and other charges, net	32,716	51,114	3,764
Total operating expenses	913,281	867,211	842,709
Operating income	210,863	63,042	72,613
Interest and debt premium expense	(76,428)	(43,047)	(41,673)
Other income (expense), net	271	305	(2,284)
Income before income taxes	134,706	20,300	28,656
Provision (benefit) for income taxes	4,011	47,760	(23,331)
Net income (loss)	$ 130,695	$ (27,460)	$ 51,987
Earnings (loss) per share—Basic	$ 1.13	$ (0.23)	$ 0.45
Earnings (loss) per share—Diluted	$ 1.12	$ (0.23)	$ 0.44
Weighted-average shares outstanding—Basic	115,663	117,724	116,390
Weighted-average shares outstanding—Diluted	116,267	117,724	118,158
License
Revenue:
Revenue	$ 509,792	$ 324,400	$ 529,265
Cost of revenue:
Cost of revenue	53,195	51,936	47,737
Support and cloud services
Revenue:
Revenue	804,825	763,700	559,222
Cost of revenue:
Cost of revenue	145,386	133,478	135,106
Software
Revenue:
Revenue	1,314,617	1,088,100	1,088,487
Cost of revenue:
Cost of revenue	198,581	185,414	182,843
Professional services
Revenue:
Revenue	143,798	167,531	153,337
Cost of revenue:
Cost of revenue	$ 135,690	$ 139,964	$ 143,659