DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended							12 Months Ended							3 Months Ended	12 Months Ended
	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Jan. 02, 2011	Sep. 30, 2012	Oct. 02, 2011	Oct. 03, 2010	Sep. 30, 2012 International	Oct. 02, 2011 International	Oct. 03, 2010 International	Sep. 27, 2009 Broomfield Facility	Oct. 03, 2010 Scottsdale Facility	Sep. 30, 2012 Defense And Security	Oct. 02, 2011 Prior To Correction	Sep. 30, 2012 Internal Revenue Service (IRS) Minimum	Sep. 30, 2012 Internal Revenue Service (IRS) Maximum	Sep. 30, 2012 Foreign Country Minimum	Sep. 30, 2012 Foreign Country Maximum	Jul. 01, 2012 Tax Adjustment Restatement Adjustment	Oct. 02, 2011 Tax Adjustment Restatement Adjustment
Basis of Presentation [Line Items]
Open tax years by major tax jurisdiction																			2007	2012	2009	2012
Concentration of credit risk in major customer									20.00%								28.00%
Income tax effect on retained earnings									$ 1,300,000
Impairment of property, plant and equipment, held for sale															1,700,000
Impairment of long-lived assets for closure																4,500,000
Stock awards excluded from computation of diluted EPS									5.1	7.3	7.4
Percentage of net sales from international market												50.00%	46.00%	40.00%
Prior period reclassification adjustment									7,400,000
Net cash provided by operating activities									171,223,000	146,561,000	107,611,000							139,200,000
Net cash (used in) provided by financing activities									392,400,000	380,638,000	(42,359,000)							388,000,000
Net income (loss)	11,593,000	8,126,000	(4,792,000)	(44,602,000)	43,376,000	32,778,000	(19,128,000)	(1,296,000)	(29,675,000)	55,730,000	59,038,000													(800,000)
Earnings per share, basic and diluted																							$ 0.02	$ 0.01
Provision (benefit) for income taxes									$ 14,950,000	$ (33,681,000)	$ (4,007,000)												$ 1,500,000