Schedule II Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Allowance for Doubtful Accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 14,386	$ 6,034	$ 4,209
Charged to Bad Debt Expense	5,984	10,350	2,514
Write-Offs/ Adjustments Charged to Allowance	5,635	1,998	689
Balance at End of Period	14,735	14,386	6,034
Valuation Allowance of Deferred Tax Assets
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	45,751	46,924	38,456
Balance at End of Period	60,704	45,751	46,924
Increases	14,953		8,642
Deductions		$ 1,173	$ 174