Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Subscription	$ 118,322	$ 65,239	$ 27,137
Support	651,807	681,524	688,502
Total recurring software revenue	770,129	746,763	715,639
Perpetual license	173,467	282,760	362,602
Total software revenue	943,596	1,029,523	1,078,241
Professional services	196,937	225,719	278,726
Total revenue	1,140,533	1,255,242	1,356,967
Cost of revenue:
Cost of software revenue	155,439	135,992	129,708
Cost of professional services revenue	170,226	198,742	243,975
Total cost of revenue	325,665	334,734	373,683
Gross margin	814,868	920,508	983,284
Sales and marketing	367,465	346,794	367,454
Research and development	229,331	227,513	226,496
General and administrative	145,615	158,715	132,225
U.S. pension settlement loss	0	66,332	0
Amortization of acquired intangible assets	33,198	36,129	32,127
Restructuring charges	76,273	43,409	28,406
Total operating expenses	851,882	878,892	786,708
Operating income (loss)	(37,014)	41,616	196,576
Foreign currency losses, net	(1,889)	(2,706)	(4,469)
Interest income	3,437	3,697	3,117
Interest expense	(29,882)	(14,742)	(8,155)
Other expense (income), net	(1,844)	(1,340)	(957)
Income (loss) before income taxes	(67,192)	26,525	186,112
Provision (benefit) for income taxes	(12,727)	(21,032)	25,918
Net income (loss)	$ (54,465)	$ 47,557	$ 160,194
Earnings (loss) per share—Basic (in USD per share)	$ (0.48)	$ 0.41	$ 1.36
Earnings (loss) per share—Diluted (in USD per share)	$ (0.48)	$ 0.41	$ 1.34
Weighted average shares outstanding—Basic (in shares)	114,612	114,775	118,094
Weighted average shares outstanding—Diluted (in shares)	114,612	116,012	119,984