Financial Instruments (Fair Values Of Financial Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013		Dec. 29, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	$ 56,294		$ 1,189
Fair values of financial liabilities			244
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	56,294		932
Fair values of financial liabilities
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets			257
Fair values of financial liabilities			244
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets
Fair values of financial liabilities
Money Market Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	56,002	[1]	705	[1]
Money Market Funds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	56,002	[1]	705	[1]
Money Market Funds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets		[1]		[1]
Money Market Funds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets		[1]		[1]
Short-Term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	292	[2]	227	[2]
Short-Term Investments [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	292	[2]	227	[2]
Short-Term Investments [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets		[2]		[2]
Short-Term Investments [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets		[2]		[2]
Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial assets		[3]	257	[3]
Fair values of derivative financial liabilities			157	[3]
Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial assets		[3]		[3]
Fair values of derivative financial liabilities		[3]		[3]
Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial assets		[3]	257	[3]
Fair values of derivative financial liabilities			157	[3]
Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial assets		[3]		[3]
Fair values of derivative financial liabilities		[3]		[3]
Interest Rate Swaps [Member] | Derivatives Designated As Hedging Instruments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial liabilities			87	[4]
Interest Rate Swaps [Member] | Derivatives Designated As Hedging Instruments [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial liabilities		[4]		[4]
Interest Rate Swaps [Member] | Derivatives Designated As Hedging Instruments [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial liabilities			87	[4]
Interest Rate Swaps [Member] | Derivatives Designated As Hedging Instruments [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial liabilities		[4]		[4]

[1] Value is based on quoted market prices of identical instruments, fair value is included in cash and cash equivalents

[2] Value is based on quoted market prices of identical instruments

[3] Value is based on the present value of the forward rates less the contract rate multiplied by the notional amount, fair value is included in other current assets or accounts payable, accrued expenses and other liabilities

[4] Value is derived from a discounted cash flow analysis based on the terms of the contract and the interest rate curve, fair value is included in accounts payable, accrued expenses and other liabilities