Fair Value Of Financial Instruments (Fair Values Of Financial Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Jan. 01, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	$ 10,459	[1]	$ 9,517	[1]
Fair values of financial liabilities	200	[2]	338	[2]
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	10,404	[1]	9,517	[1]
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets	55	[1]
Fair values of financial liabilities	200	[2]	338	[2]
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of financial assets		[1]		[1]
Fair values of financial liabilities		[2]		[2]
Money Market Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	10,404	[3]	7,003	[3]
Money Market Funds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets	10,404	[3]	7,003	[3]
Money Market Funds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets		[3]		[3]
Short-Term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets			2,514	[4]
Short-Term Investments [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets			2,514	[4]
Short-Term Investments [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of non-derivative financial assets		[4]		[4]
Foreign Exchange Contracts [Member] | Non-Designated Hedges [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial assets	55	[1]		[1]
Fair values of derivative financial liabilities	31	[1]	154	[1]
Foreign Exchange Contracts [Member] | Non-Designated Hedges [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial assets	55	[1]
Fair values of derivative financial liabilities	31	[1]	154	[1]
Foreign Exchange Contracts [Member] | Non-Designated Hedges [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial assets		[1]		[1]
Fair values of derivative financial liabilities		[1]		[1]
Interest Rate Swaps [Member] | Designated Hedges [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial liabilities	169	[2]	184	[2]
Interest Rate Swaps [Member] | Designated Hedges [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial liabilities	169	[2]	184	[2]
Interest Rate Swaps [Member] | Designated Hedges [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair values of derivative financial liabilities		[2]		[2]

[1] 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

[2] 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

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

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