INCOME TAXES - Components of Deferred Tax Assets (Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Accounts receivable, net	$ 1,173	$ 945
Inventories	14,501	9,264
Accrued employee benefit expenses	8,806	4,230
Net operating losses	149,571	140,555
Tax credits	144,219	140,069
Accrued other expenses	11,397	6,287
Deferred equity compensation	16,725	14,845
Property and equipment, net	3,115	3,242
Other assets	11,753	9,797
Total deferred tax assets	361,260	329,234
Intangible assets	(127,213)	(100,050)
Deferred Tax Liabilities, Foreign Declared Dividend	(3,642)	0
Effective Income Tax Reconciliation, Deduction, Foreign Declared Dividends, Amount	3,642	0	0
Total deferred tax liabilities	(130,855)	(100,050)
Less valuation allowance	(218,946)	(210,073)
Deferred Tax Assets (Liabilities), Net, Total	$ 11,459	$ 19,111