Components of Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 01, 2012	Oct. 02, 2011
Schedule of Accrued Liabilities [Line Items]
Payroll, bonus, accrued time off and other employee benefits	$ 38,342	$ 41,264
Fair value of foreign currency forward		11,675
Restructuring and severance	9,352	9,562
Licenses	9,601	9,636
Outside services	12,686	7,815
Interest	1,965	4,037
Warranties	2,426	2,945
Commissions	2,813	2,692
Other	16,682	11,452
Accrued liabilities	$ 93,867	$ 101,078