Segment Information (Revenue And Operating Income) (Details) (USD $)	3 Months Ended
	Dec. 31, 2011		Jan. 01, 2011
Revenue	$ 318,276,000		$ 266,552,000
Operating income	32,505,000		17,110,000
Sales and marketing expenses	(97,778,000)		(84,521,000)
General and administrative expenses	(29,572,000)		(23,484,000)
Loss on services customer contract			5,000,000
Software Products Segment [Member]
Revenue	236,963,000		201,910,000
Operating income	151,961,000		126,519,000
Services Segment [Member]
Revenue	81,313,000		64,642,000
Operating income	$ 7,894,000	[1]	$ (1,404,000)	[1]

[1] In the first quarter of 2011, we made a strategic decision to enter into a contract with a customer in the automotive industry, for which we expected our costs to exceed our revenue by approximately $5 million. Services segment operating income in the first three months of 2011 included immediate recognition of the approximately 5 million estimated loss on this contract.W