CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Hosting and professional services		$ 926,044	$ 913,643	$ 940,044
Product and licensing		296,127	338,693	375,230
Maintenance and support		256,728	268,935	252,326
Total revenues	[1]	1,478,899	1,521,271	1,567,600
Cost of revenues:
Hosting and professional services		518,145	551,419	608,286
Product and licensing		61,995	71,280	55,670
Maintenance and support		30,989	33,369	39,228
Amortization of intangible assets		27,810	27,416	40,218
Total cost of revenues		638,939	683,484	743,402
Gross profit		839,960	837,787	824,198
Operating expenses:
Research and development		226,234	192,633	207,189
Sales and marketing		273,324	274,031	286,550
General and administrative		156,353	172,638	213,809
Amortization of intangible assets		78,707	81,622	105,375
Intangible Assets Amortization Expense		50,897	54,206	65,157
Acquisition-related costs, net		2,884	7,965	12,010
Restructuring and other charges, net		17,680	29,147	52,846
Impairment of goodwill and other intangible assets		0	0	170,941
Total operating expenses		727,372	730,620	1,008,502
Income (loss) from operations		112,588	107,167	(184,304)
Other income (expense):
Interest income		4,527	13,705	9,327
Interest expense		(93,968)	(120,095)	(137,253)
Other expense, net		(13,117)	(870)	(1,767)
Income (loss) before income taxes		10,030	(93)	(313,997)
(Benefit) provision for income taxes		(18,752)	12,105	(77,160)
Net income (loss) from continuing operations		28,782	(12,198)	(236,837)
Net (loss) income from discontinued operations		(7,386)	226,008	76,909
Net income (loss)		$ 21,396	$ 213,810	$ (159,928)
Net income (loss) per common share - basic:
Continuing operations (per share)		$ 0.10	$ (0.04)	$ (0.81)
Discontinued operations (per share)		(0.02)	0.79	0.26
Total net income (loss) per basic common share (per share)		0.08	0.75	(0.55)
Continuing operations (per share)		0.10	(0.04)	(0.81)
Discontinued operations (per share)		(0.03)	0.79	0.26
Diluted (per share)		$ 0.07	$ 0.75	$ (0.55)
Weighted average common shares outstanding:
Basic (in shares)		282,644	286,347	291,318
Diluted (in shares)		291,994	286,347	291,318

[1] Segment revenues differ from reported revenues due to certain revenue adjustments related to acquisitions that would otherwise have been recognized but for the purchase accounting treatment of the business combinations. These revenues are included to allow for more complete comparisons to the financial results of historical operations and in evaluating management performance.