Financial Instruments (Fair Values Of Financial Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012		Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	$ 1,014		$ 10,459
Fair values of financial liabilities	345		200
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	931		10,404
Fair values of financial liabilities
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	83		55
Fair values of financial liabilities	345		200
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	705	[1]	10,404	[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	705	[1]	10,404	[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	226	[2]		[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	226	[2]		[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	83	[3]	55	[3]
Fair values of derivative financial liabilities	220	[3]	31	[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	83	[3]	55	[3]
Fair values of derivative financial liabilities	220	[3]	31	[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	125	[4]	169	[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	125	[4]	169	[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