Fair Value Of Financial Instruments (Fair Values Of Financial Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012		Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	$ 1,189		$ 10,459
Fair values of financial liabilities	244		200
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	932		10,404
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	257		55
Fair values of financial liabilities	244		200
Money Market Funds [Member] | Derivatives Designated As Hedging Instruments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	705	[1]	10,404	[1]
Money Market Funds [Member] | Derivatives Designated As Hedging Instruments [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	705	[1]	10,404	[1]
Short-Term Investments [Member] | Derivatives Designated As Hedging Instruments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	227	[2]		[2]
Short-Term Investments [Member] | Derivatives Designated As Hedging Instruments [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	227	[2]		[2]
Short-Term Investments [Member] | Derivatives Designated As Hedging Instruments [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] | Derivatives Designated As Hedging Instruments [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets		[2]		[2]
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	[3]	169	[3]
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	[3]	169	[3]
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	257	[4]	55	[4]
Fair values of derivative financial liabilities	157	[4]	31	[4]
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	257	[4]	55	[4]
Fair values of derivative financial liabilities	$ 157	[4]	$ 31	[4]

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

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

[3] 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

[4] 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