Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Subscription	$ 482,027	$ 279,246	$ 118,322
Support	496,826	574,680	651,807
Total recurring revenue	978,853	853,926	770,129
Perpetual license	109,634	133,390	173,467
Total subscription, support and license revenue	1,088,487	987,316	943,596
Professional services	153,337	176,723	196,937
Total revenue	1,241,824	1,164,039	1,140,533
Cost of revenue:
Cost of license and subscription revenue	94,108	86,047	69,710
Cost of support revenue	88,575	92,202	85,729
Total cost of software revenue	182,683	178,249	155,439
Cost of professional services revenue	143,511	150,770	170,226
Total cost of revenue	326,194	329,019	325,665
Gross margin	915,630	835,020	814,868
Sales and marketing	414,524	372,946	367,465
Research and development	249,774	236,059	229,331
General and administrative	142,981	145,067	145,615
Amortization of acquired intangible assets	31,350	32,108	33,198
Restructuring and other charges, net	3,764	7,942	76,273
Total operating expenses	842,393	794,122	851,882
Operating income (loss)	73,237	40,898	(37,014)
Foreign currency losses, net	(6,982)	(5,686)	(1,889)
Interest income	3,819	3,249	3,437
Interest expense	(41,673)	(42,400)	(29,882)
Other income (expense), net	255	2,533	(1,844)
Income (loss) before income taxes	28,656	(1,406)	(67,192)
Benefit from income taxes	(23,331)	(7,645)	(12,727)
Net income (loss)	$ 51,987	$ 6,239	$ (54,465)
Earnings (loss) per share—Basic (in USD per share)	$ 0.45	$ 0.05	$ (0.48)
Earnings (loss) per share—Diluted (in USD per share)	$ 0.44	$ 0.05	$ (0.48)
Weighted average shares outstanding—Basic (in shares)	116,390	115,523	114,612
Weighted average shares outstanding—Diluted (in shares)	118,158	117,356	114,612