Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Revenue:
Revenue	$ 290,451	$ 307,883	$ 625,140	$ 614,527
Cost of revenue:
Cost of revenue	79,904	83,708	157,256	166,743
Gross margin	210,547	224,175	467,884	447,784
Operating expenses:
Sales and marketing	103,722	98,390	207,940	197,765
Research and development	61,402	62,197	122,184	126,169
General and administrative	35,371	33,369	73,235	68,389
Amortization of acquired intangible assets	5,930	7,895	11,866	15,716
Restructuring and other charges, net	26,980	114	45,473	219
Total operating expenses	233,405	201,965	460,698	408,258
Operating income (loss)	(22,858)	22,210	7,186	39,526
Interest expense	(11,383)	(10,379)	(21,659)	(20,426)
Other income (expense), net	821	(285)	1,475	(1,083)
Income (loss) before income taxes	(33,420)	11,546	(12,998)	18,017
Provision (benefit) for income taxes	10,093	3,624	9,530	(3,782)
Net income (loss)	$ (43,513)	$ 7,922	$ (22,528)	$ 21,799
Earnings per share—Basic (in USD per share)	$ (0.37)	$ 0.07	$ (0.19)	$ 0.19
Earnings per share—Diluted (in USD per share)	$ (0.37)	$ 0.07	$ (0.19)	$ 0.19
Weighted average shares outstanding—Basic (in shares)	118,461	116,241	118,392	115,986
Weighted average shares outstanding—Diluted (in shares)	118,461	117,905	118,392	117,780
Software
Revenue:
Revenue	$ 249,521	$ 262,453	$ 542,764	$ 527,643
Cost of revenue:
Cost of revenue	45,749	46,189	89,509	92,805
License
Revenue:
Revenue	61,876	120,505	167,198	240,023
Cost of revenue:
Cost of revenue	12,875	11,854	25,438	23,968
Support and cloud services
Revenue:
Revenue	187,645	141,948	375,566	287,620
Cost of revenue:
Cost of revenue	32,874	34,335	64,071	68,837
Professional services
Revenue:
Revenue	40,930	45,430	82,376	86,884
Cost of revenue:
Cost of revenue	$ 34,155	$ 37,519	$ 67,747	$ 73,938