Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Revenue:
Revenue	$ 351,721	$ 295,486	$ 1,067,434	$ 920,626
Cost of revenue:
Cost of revenue	79,224	82,705	249,656	239,961
Gross margin	272,497	212,781	817,778	680,665
Operating expenses:
Sales and marketing	104,594	108,202	319,636	316,142
Research and development	61,429	60,590	186,691	182,774
General and administrative	35,709	28,773	113,895	102,008
Amortization of acquired intangible assets	7,302	5,920	21,367	17,786
Restructuring and other charges, net	62	(9)	32,338	45,464
Total operating expenses	209,096	203,476	673,927	664,174
Operating income	63,401	9,305	143,851	16,491
Interest and debt premium expense	(19,660)	(10,816)	(64,376)	(32,475)
Other income (expense), net	775	1,026	(150)	2,501
Income (loss) before income taxes	44,516	(485)	79,325	(13,483)
Provision for income taxes	9,838	14,273	2,036	23,803
Net income (loss)	$ 34,678	$ (14,758)	$ 77,289	$ (37,286)
Earnings (loss) per share—Basic	$ 0.30	$ (0.13)	$ 0.67	$ (0.32)
Earnings (loss) per share—Diluted	$ 0.30	$ (0.13)	$ 0.67	$ (0.32)
Weighted-average shares outstanding—Basic	115,759	116,133	115,521	117,636
Weighted-average shares outstanding—Diluted	116,229	116,133	115,981	117,636
License
Revenue:
Revenue	$ 118,248	$ 62,918	$ 369,285	$ 230,116
Cost of revenue:
Cost of revenue	13,001	13,307	40,047	38,745
Support and cloud services
Revenue:
Revenue	199,146	190,487	586,555	566,053
Cost of revenue:
Cost of revenue	34,788	33,785	107,980	97,856
Software
Revenue:
Revenue	317,394	253,405	955,840	796,169
Cost of revenue:
Cost of revenue	47,789	47,092	148,027	136,601
Professional services
Revenue:
Revenue	34,327	42,081	111,594	124,457
Cost of revenue:
Cost of revenue	$ 31,435	$ 35,613	$ 101,629	$ 103,360