Schedule of Outstanding Foreign Currency Forward Contracts (Detail) - Foreign Currency Forward Contracts	Sep. 27, 2015 USD ($)
Derivatives Designated as Hedging Instruments | Buy Contracts
Derivative [Line Items]
Derivative notional amount	$ 25,977,000
Derivatives Designated as Hedging Instruments | Buy Contracts | Euro
Derivative [Line Items]
Derivative notional amount	21,929,000
Derivatives Designated as Hedging Instruments | Buy Contracts | Korea (South), Won
Derivative [Line Items]
Derivative notional amount	4,048,000
Derivatives Designated as Hedging Instruments | Sell Contracts
Derivative [Line Items]
Derivative notional amount	76,362,000
Derivatives Designated as Hedging Instruments | Sell Contracts | Japanese Yen
Derivative [Line Items]
Derivative notional amount	76,362,000
Derivatives Not Designated as Hedging Instruments | Buy Contracts
Derivative [Line Items]
Derivative notional amount	46,280,000
Derivatives Not Designated as Hedging Instruments | Buy Contracts | Swiss Francs
Derivative [Line Items]
Derivative notional amount	2,866,000
Derivatives Not Designated as Hedging Instruments | Buy Contracts | Korea (South), Won
Derivative [Line Items]
Derivative notional amount	16,837,000
Derivatives Not Designated as Hedging Instruments | Buy Contracts | Taiwan Dollar
Derivative [Line Items]
Derivative notional amount	26,577,000
Derivatives Not Designated as Hedging Instruments | Sell Contracts
Derivative [Line Items]
Derivative notional amount	75,326,000
Derivatives Not Designated as Hedging Instruments | Sell Contracts | Japanese Yen
Derivative [Line Items]
Derivative notional amount	60,791,000
Derivatives Not Designated as Hedging Instruments | Sell Contracts | Euro
Derivative [Line Items]
Derivative notional amount	$ 14,535,000