Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 28, 2020	Mar. 31, 2021	Mar. 28, 2020
Revenue:
Revenue	$ 461,785	$ 359,603	$ 890,836	$ 715,713
Cost of revenue:
Cost of revenue	89,448	83,027	176,278	170,432
Gross margin	372,337	276,576	714,558	545,281
Operating expenses:
Sales and marketing	129,178	107,438	253,903	215,042
Research and development	72,545	59,954	143,380	125,262
General and administrative	60,805	33,629	110,333	78,186
Amortization of acquired intangible assets	7,650	7,288	14,197	14,065
Restructuring and other charges, net	469	18,242	716	32,276
Total operating expenses	270,647	226,551	522,529	464,831
Operating income	101,690	50,025	192,029	80,450
Interest and debt premium expense	(12,925)	(32,618)	(24,444)	(44,716)
Other expense, net	(2,408)	(1,629)	(3,821)	(925)
Income before income taxes	86,357	15,778	163,764	34,809
Provision (benefit) for income taxes	(22,905)	8,622	30,987	(7,802)
Net income	$ 109,262	$ 7,156	$ 132,777	$ 42,611
Earnings per share—Basic	$ 0.94	$ 0.06	$ 1.14	$ 0.37
Earnings per share—Diluted	$ 0.92	$ 0.06	$ 1.13	$ 0.37
Weighted-average shares outstanding—Basic	116,777	115,606	116,587	115,401
Weighted-average shares outstanding—Diluted	118,331	116,017	117,966	115,856
License
Revenue:
Revenue	$ 198,011	$ 127,607	$ 375,186	$ 251,037
Cost of revenue:
Cost of revenue	14,160	13,873	27,416	27,046
Support and cloud services
Revenue:
Revenue	223,756	196,473	440,002	387,409
Cost of revenue:
Cost of revenue	39,972	34,264	78,314	73,192
Software
Revenue:
Revenue	421,767	324,080	815,188	638,446
Cost of revenue:
Cost of revenue	54,132	48,137	105,730	100,238
Professional services
Revenue:
Revenue	40,018	35,523	75,648	77,267
Cost of revenue:
Cost of revenue	$ 35,316	$ 34,890	$ 70,548	$ 70,194