Restructuring Activities and Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 01, 2012
Scottsdale Facility
Restructuring Reserve Disclosures [Abstract]
Beginning Balance	$ 6,837
Cash expenditures	(524)
Ending Balance	6,313
Scottsdale Facility | Employee Severance
Restructuring Reserve Disclosures [Abstract]
Beginning Balance	355
Cash expenditures	(159)
Ending Balance	196
Scottsdale Facility | Contract Termination Costs
Restructuring Reserve Disclosures [Abstract]
Beginning Balance	6,482
Cash expenditures	(365)
Ending Balance	6,117
Other Facility
Restructuring Reserve Disclosures [Abstract]
Beginning Balance	2,700
Provisions	(7,200)
Other Facility | Employee Severance
Restructuring Reserve Disclosures [Abstract]
Beginning Balance	2,724
Provisions	7,225
Cash expenditures	(2,741)
Other non-cash settlement	(1,388)
Ending Balance	$ 5,820