Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Revenue:
License and subscription	$ 347,999	$ 389,739	$ 354,282
Support	681,524	688,502	654,679
Professional services	225,719	278,726	284,580
Total revenue	1,255,242	1,356,967	1,293,541
Cost of revenue:
Cost of license and subscription revenue	53,163	45,005	39,037
Cost of support revenue	82,829	84,703	81,081
Cost of professional services revenue	198,742	243,975	252,921
Total cost of revenue	334,734	373,683	373,039
Gross margin	920,508	983,284	920,502
Sales and marketing	338,777	357,447	360,640
Research and development	227,513	226,496	221,918
General and administrative	166,732	142,232	131,937
U.S. pension settlement loss	66,332	0	0
Amortization of acquired intangible assets	36,129	32,127	26,486
Restructuring charges	43,409	28,406	52,197
Total operating expenses	878,892	786,708	793,178
Operating income	41,616	196,576	127,324
Foreign currency losses, net	(2,706)	(4,469)	(2,027)
Interest income	3,697	3,117	2,862
Interest expense	(14,742)	(8,155)	(6,976)
Other expense (income), net	(1,340)	(957)	5,051
Income before income taxes	26,525	186,112	126,234
Provision (benefit) for income taxes	(21,032)	25,918	(17,535)
Net income	$ 47,557	$ 160,194	$ 143,769
Earnings (loss) per share—Basic (in USD per share)	$ 0.41	$ 1.36	$ 1.20
Earnings (loss) per share—Diluted (in USD per share)	$ 0.41	$ 1.34	$ 1.19
Weighted average shares outstanding—Basic (in shares)	114,775	118,094	119,473
Weighted average shares outstanding—Diluted (in shares)	116,012	119,984	121,240