Income Taxes (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended		3 Months Ended
	Jun. 29, 2013	Sep. 30, 2012	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 29, 2012 Servigistics, Inc	Oct. 02, 2012 Servigistics, Inc	Jun. 29, 2013 Tax Litigation
Income Tax Disclosure [Line Items]
Effective income tax rate	26.00%		26.00%	12.00%	25.00%
Income before income taxes	$ 46,396,000		$ 30,779,000	$ 77,827,000	$ 64,577,000
Statutory federal income tax rate				35.00%
Income tax benefit related to resolution of tax examination	1,600,000			1,600,000				3,200,000
Noncash charge related to Japanese legislative change and expiration of U.S. R&D tax credit			4,200,000		1,500,000
Income tax reconciliation, tax credits, research				2,000,000
Non-cash charge to establish a valuation allowance against U.S. deferred tax assets		124,500,000
U.S. deferred tax liabilities		28,000,000
Identifiable intangible assets						118,300,000	118,300,000
Deferred tax assets and liabilities, net						(35,600,000)	35,566,000
Tax benefit recorded to decrease valuation allowance in conjunction with business combination						32,600,000
Unrecognized tax benefits	16,400,000	19,100,000		16,400,000
Income tax provision upon recognition of unrecognized tax benefit	15,600,000			15,600,000
Increase in valuation allowance	7,100,000			7,100,000
Potentail reduction in unrecognized tax benefits and accrued interest over next 12 months	$ 7,000,000			$ 7,000,000