Estimated Future Amortization Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 01, 2012
Remainder of Year
Amortization expense	$ 96,871
More than One and within Two Years from Balance Sheet Date
Amortization expense	80,837
More than Two and within Three Years from Balance Sheet Date
Amortization expense	74,739
More than Three and within Four Years from Balance Sheet Date
Amortization expense	69,667
More than Four Years from Balance Sheet Date and Thereafter
Amortization expense	$ 144,812