Net Sales by Originating Geographic Area and Estimated End Market (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 01, 2012	Jan. 02, 2011
Segment Reporting Disclosure [Line Items]
Net Sales	$ 240,920	$ 184,351
Defense And Security
Segment Reporting Disclosure [Line Items]
Net Sales	69,115	69,843
Aerospace
Segment Reporting Disclosure [Line Items]
Net Sales	49,123	45,071
Enterprise and Communication
Segment Reporting Disclosure [Line Items]
Net Sales	75,124	33,636
Industrial and Alternative Energy
Segment Reporting Disclosure [Line Items]
Net Sales	47,558	35,801
United States
Segment Reporting Disclosure [Line Items]
Net Sales	169,487	112,459
Europe
Segment Reporting Disclosure [Line Items]
Net Sales	33,228	30,689
Asia
Segment Reporting Disclosure [Line Items]
Net Sales	$ 38,205	$ 41,203