Segment Information (Revenue and Operating Income) (Details) $ in Thousands		3 Months Ended
		Jan. 02, 2016 USD ($) segments	Jan. 03, 2015 USD ($)
Number of operating and reportable segments | segments		2
Revenue		$ 291,017	$ 325,442
Operating income	[1]	(13,292)	37,631
Sales and marketing expenses	[1]	(98,330)	(89,484)
General and administrative expenses	[1]	(41,928)	(35,130)
Interest and other expense, net		(6,253)	(3,224)
Income before income taxes		(19,545)	34,407
Restructuring charges		37,147	(255)
Segment Software Products
Revenue		225,537	246,991
Operating income	[1]	117,888	149,045
Restructuring charges		13,000
Segment Services
Revenue		65,480	78,451
Operating income	[1]	9,078	$ 13,200
Restructuring charges		4,800
Sales and Marketing
Restructuring charges		15,900
General and Administrative
Restructuring charges		$ 3,400

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjZhYWE2OThhOWIyNjRkYzFhMDYyZDNlZGY3NTAwMTZkfFRleHRTZWxlY3Rpb246RjNCQjhDMEExMzM0RDBCODY3QTY3RTU2QTVERUFEMkUM}