Fair Value Measurement (Financial Assets And Liabilities Carried At Fair Value Measured On A Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 25, 2011
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Cash and cash equivalents		$ 45,004
Investments in marketable securities	4,781	3,762
Bonds - foreign government		4,976
Derivative assets	447	66
Derivative liabilities	957	15,566
Contingent consideration liabilities	58,885	9,566
Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Cash and cash equivalents		45,004
Investments in marketable securities	4,781	3,762
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Bonds - foreign government		4,976
Derivative assets	447	66
Derivative liabilities	957	15,566
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Contingent consideration liabilities	$ 58,885	$ 9,566