Liabilities Measured and Recorded at Fair Value On Recurring Basis Using Unobservable Inputs (Level Three) (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Dec. 28, 2012	Sep. 28, 2012	Dec. 28, 2012 Fair Value, Inputs, Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 1,866	$ 1,876	$ 1,876
Additions
Change in fair value of contingent consideration			(10)
Ending Balance	$ 1,866	$ 1,876	$ 1,866